Java配置文件Properties的读取、写入与更新操做

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<ol start="1" class="dp-j" style="border:none;color:rgb(92,92,92);font-family:Consolas, 'Courier New', Courier, mono, serif;line-height:26px;"><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">/**&nbsp;</span>&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">*&nbsp;实现对Java配置文件Properties的读取、写入与更新操做&nbsp;</span>&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">*/</span><span style="border:none;background-color:inherit;">&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;"><span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">package</span><span style="border:none;background-color:inherit;">&nbsp;test;&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;"><span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">import</span><span style="border:none;background-color:inherit;">&nbsp;java.io.BufferedInputStream;&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;"><span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">import</span><span style="border:none;background-color:inherit;">&nbsp;java.io.FileInputStream;&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;"><span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">import</span><span style="border:none;background-color:inherit;">&nbsp;java.io.FileNotFoundException;&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;"><span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">import</span><span style="border:none;background-color:inherit;">&nbsp;java.io.FileOutputStream;&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;"><span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">import</span><span style="border:none;background-color:inherit;">&nbsp;java.io.IOException;&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;"><span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">import</span><span style="border:none;background-color:inherit;">&nbsp;java.io.InputStream;&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;"><span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">import</span><span style="border:none;background-color:inherit;">&nbsp;java.io.OutputStream;&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;"><span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">import</span><span style="border:none;background-color:inherit;">&nbsp;java.util.Properties;&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">/**&nbsp;</span>&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">*&nbsp;@author&nbsp;</span>&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">*&nbsp;@version&nbsp;</span>&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">*/</span><span style="border:none;background-color:inherit;">&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;"><span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">public</span><span style="border:none;background-color:inherit;">&nbsp;</span><span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">class</span><span style="border:none;background-color:inherit;">&nbsp;SetSystemProperty&nbsp;{&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;<span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">//属性文件的路径&nbsp;</span><span style="border:none;background-color:inherit;">&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">static</span><span style="border:none;background-color:inherit;">&nbsp;String&nbsp;profilepath=</span><span class="string" style="border:none;color:#FF0000;background-color:inherit;">"mail.properties"</span><span style="border:none;background-color:inherit;">;&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;<span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">/**&nbsp;</span>&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;采用静态方法&nbsp;</span>&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;*/</span><span style="border:none;background-color:inherit;">&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">private</span><span style="border:none;background-color:inherit;">&nbsp;</span><span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">static</span><span style="border:none;background-color:inherit;">&nbsp;Properties&nbsp;props&nbsp;=&nbsp;</span><span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">new</span><span style="border:none;background-color:inherit;">&nbsp;Properties();&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">static</span><span style="border:none;background-color:inherit;">&nbsp;{&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">try</span><span style="border:none;background-color:inherit;">&nbsp;{&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;props.load(<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">new</span><span style="border:none;background-color:inherit;">&nbsp;FileInputStream(profilepath));&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">catch</span><span style="border:none;background-color:inherit;">&nbsp;(FileNotFoundException&nbsp;e)&nbsp;{&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;e.printStackTrace();&nbsp;&nbsp;&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;System.exit(-<span class="number" style="border:none;color:rgb(192,0,0);background-color:inherit;">1</span><span style="border:none;background-color:inherit;">);&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">catch</span><span style="border:none;background-color:inherit;">&nbsp;(IOException&nbsp;e)&nbsp;{&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;System.exit(-<span class="number" style="border:none;color:rgb(192,0,0);background-color:inherit;">1</span><span style="border:none;background-color:inherit;">);&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;<span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">/**&nbsp;</span>&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;读取属性文件中相应键的值&nbsp;</span>&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;@param&nbsp;key&nbsp;</span>&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;主键&nbsp;</span>&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;@return&nbsp;String&nbsp;</span>&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;*/</span><span style="border:none;background-color:inherit;">&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">public</span><span style="border:none;background-color:inherit;">&nbsp;</span><span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">static</span><span style="border:none;background-color:inherit;">&nbsp;String&nbsp;getKeyValue(String&nbsp;key)&nbsp;{&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">return</span><span style="border:none;background-color:inherit;">&nbsp;props.getProperty(key);&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;<span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">/**&nbsp;</span>&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;根据主键key读取主键的值value&nbsp;</span>&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;@param&nbsp;filePath&nbsp;属性文件路径&nbsp;</span>&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;@param&nbsp;key&nbsp;键名&nbsp;</span>&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;*/</span><span style="border:none;background-color:inherit;">&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">public</span><span style="border:none;background-color:inherit;">&nbsp;</span><span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">static</span><span style="border:none;background-color:inherit;">&nbsp;String&nbsp;readValue(String&nbsp;filePath,&nbsp;String&nbsp;key)&nbsp;{&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Properties&nbsp;props&nbsp;=&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">new</span><span style="border:none;background-color:inherit;">&nbsp;Properties();&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">try</span><span style="border:none;background-color:inherit;">&nbsp;{&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;InputStream&nbsp;in&nbsp;=&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">new</span><span style="border:none;background-color:inherit;">&nbsp;BufferedInputStream(</span><span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">new</span><span style="border:none;background-color:inherit;">&nbsp;FileInputStream(&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;filePath));&nbsp;&nbsp;&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;props.load(in);&nbsp;&nbsp;&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;String&nbsp;value&nbsp;=&nbsp;props.getProperty(key);&nbsp;&nbsp;&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;System.out.println(key&nbsp;+<span class="string" style="border:none;color:#FF0000;background-color:inherit;">"键的值是："</span><span style="border:none;background-color:inherit;">+&nbsp;value);&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">return</span><span style="border:none;background-color:inherit;">&nbsp;value;&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">catch</span><span style="border:none;background-color:inherit;">&nbsp;(Exception&nbsp;e)&nbsp;{&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;e.printStackTrace();&nbsp;&nbsp;&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">return</span><span style="border:none;background-color:inherit;">&nbsp;</span><span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">null</span><span style="border:none;background-color:inherit;">;&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;<span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">/**&nbsp;</span>&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;更新（或插入）一对properties信息(主键及其键值)&nbsp;</span>&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;若是该主键已经存在，更新该主键的值；&nbsp;</span>&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;若是该主键不存在，则插件一对键值。&nbsp;</span>&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;@param&nbsp;keyname&nbsp;键名&nbsp;</span>&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;@param&nbsp;keyvalue&nbsp;键值&nbsp;</span>&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;*/</span><span style="border:none;background-color:inherit;">&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">public</span><span style="border:none;background-color:inherit;">&nbsp;</span><span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">static</span><span style="border:none;background-color:inherit;">&nbsp;</span><span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">void</span><span style="border:none;background-color:inherit;">&nbsp;writeProperties(String&nbsp;keyname,String&nbsp;keyvalue)&nbsp;{&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">try</span><span style="border:none;background-color:inherit;">&nbsp;{&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">//&nbsp;调用&nbsp;Hashtable&nbsp;的方法&nbsp;put，使用&nbsp;getProperty&nbsp;方法提供并行性。&nbsp;</span><span style="border:none;background-color:inherit;">&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">//&nbsp;强制要求为属性的键和值使用字符串。返回值是&nbsp;Hashtable&nbsp;调用&nbsp;put&nbsp;的结果。&nbsp;</span><span style="border:none;background-color:inherit;">&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;OutputStream&nbsp;fos&nbsp;=&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">new</span><span style="border:none;background-color:inherit;">&nbsp;FileOutputStream(profilepath);&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;props.setProperty(keyname,&nbsp;keyvalue);&nbsp;&nbsp;&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">//&nbsp;以适合使用&nbsp;load&nbsp;方法加载到&nbsp;Properties&nbsp;表中的格式，&nbsp;</span><span style="border:none;background-color:inherit;">&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">//&nbsp;将此&nbsp;Properties&nbsp;表中的属性列表（键和元素对）写入输出流&nbsp;</span><span style="border:none;background-color:inherit;">&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;props.store(fos,&nbsp;<span class="string" style="border:none;color:#FF0000;background-color:inherit;">"Update&nbsp;'"</span><span style="border:none;background-color:inherit;">&nbsp;+&nbsp;keyname&nbsp;+&nbsp;</span><span class="string" style="border:none;color:#FF0000;background-color:inherit;">"'&nbsp;value"</span><span style="border:none;background-color:inherit;">);&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">catch</span><span style="border:none;background-color:inherit;">&nbsp;(IOException&nbsp;e)&nbsp;{&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;System.err.println(<span class="string" style="border:none;color:#FF0000;background-color:inherit;">"属性文件更新错误"</span><span style="border:none;background-color:inherit;">);&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;<span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">/**&nbsp;</span>&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;更新properties文件的键值对&nbsp;</span>&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;若是该主键已经存在，更新该主键的值；&nbsp;</span>&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;若是该主键不存在，则插件一对键值。&nbsp;</span>&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;@param&nbsp;keyname&nbsp;键名&nbsp;</span>&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;@param&nbsp;keyvalue&nbsp;键值&nbsp;</span>&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;"><span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;*/</span><span style="border:none;background-color:inherit;">&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">public</span><span style="border:none;background-color:inherit;">&nbsp;</span><span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">void</span><span style="border:none;background-color:inherit;">&nbsp;updateProperties(String&nbsp;keyname,String&nbsp;keyvalue)&nbsp;{&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">try</span><span style="border:none;background-color:inherit;">&nbsp;{&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;props.load(<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">new</span><span style="border:none;background-color:inherit;">&nbsp;FileInputStream(profilepath));&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">//&nbsp;调用&nbsp;Hashtable&nbsp;的方法&nbsp;put，使用&nbsp;getProperty&nbsp;方法提供并行性。&nbsp;</span><span style="border:none;background-color:inherit;">&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">//&nbsp;强制要求为属性的键和值使用字符串。返回值是&nbsp;Hashtable&nbsp;调用&nbsp;put&nbsp;的结果。&nbsp;</span><span style="border:none;background-color:inherit;">&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;OutputStream&nbsp;fos&nbsp;=&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">new</span><span style="border:none;background-color:inherit;">&nbsp;FileOutputStream(profilepath);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;props.setProperty(keyname,&nbsp;keyvalue);&nbsp;&nbsp;&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">//&nbsp;以适合使用&nbsp;load&nbsp;方法加载到&nbsp;Properties&nbsp;表中的格式，&nbsp;</span><span style="border:none;background-color:inherit;">&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">//&nbsp;将此&nbsp;Properties&nbsp;表中的属性列表（键和元素对）写入输出流&nbsp;</span><span style="border:none;background-color:inherit;">&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;props.store(fos,&nbsp;<span class="string" style="border:none;color:#FF0000;background-color:inherit;">"Update&nbsp;'"</span><span style="border:none;background-color:inherit;">&nbsp;+&nbsp;keyname&nbsp;+&nbsp;</span><span class="string" style="border:none;color:#FF0000;background-color:inherit;">"'&nbsp;value"</span><span style="border:none;background-color:inherit;">);&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">catch</span><span style="border:none;background-color:inherit;">&nbsp;(IOException&nbsp;e)&nbsp;{&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;System.err.println(<span class="string" style="border:none;color:#FF0000;background-color:inherit;">"属性文件更新错误"</span><span style="border:none;background-color:inherit;">);&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;&nbsp;</span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;<span class="comment" style="border:none;color:rgb(0,130,0);background-color:inherit;">//测试代码&nbsp;</span><span style="border:none;background-color:inherit;">&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">public</span><span style="border:none;background-color:inherit;">&nbsp;</span><span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">static</span><span style="border:none;background-color:inherit;">&nbsp;</span><span class="keyword" style="border:none;color:#0000FF;font-weight:bold;background-color:inherit;">void</span><span style="border:none;background-color:inherit;">&nbsp;main(String[]&nbsp;args)&nbsp;{&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;readValue(<span class="string" style="border:none;color:#FF0000;background-color:inherit;">"mail.properties"</span><span style="border:none;background-color:inherit;">,&nbsp;</span><span class="string" style="border:none;color:#FF0000;background-color:inherit;">"MAIL_SERVER_PASSWORD"</span><span style="border:none;background-color:inherit;">);&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;writeProperties(<span class="string" style="border:none;color:#FF0000;background-color:inherit;">"MAIL_SERVER_INCOMING"</span><span style="border:none;background-color:inherit;">,&nbsp;</span><span class="string" style="border:none;color:#FF0000;background-color:inherit;">"327@qq.com"</span><span style="border:none;background-color:inherit;">);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;System.out.println(<span class="string" style="border:none;color:#FF0000;background-color:inherit;">"操做完成"</span><span style="border:none;background-color:inherit;">);&nbsp;&nbsp;&nbsp;</span></span></li><li class="alt" style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:inherit;line-height:18px;"> <span style="border:none;color:#000000;background-color:inherit;">&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp;&nbsp;</span></li><li style="border-style:none none none solid;border-left-width:3px;border-left-color:rgb(153,153,153);list-style:outside;color:rgb(85,85,85);line-height:18px;background-color:rgb(248,248,248);"> <span style="border:none;color:#000000;background-color:inherit;">}&nbsp;</span></li></ol> </div>