ACTION中直接上传图片或者文档 .

时间 2019-12-06

标签 action 直接上传图片或者文档繁體版

原文原文链接

1. 先在页面处配置上传按钮：html

form中须要添加 enctype="multipart/form-data" 参数，以下java

<html:form action="/menuSmart.shtml" enctype="multipart/form-data" method="post"> post

如下为上传按钮，并外加显示链接ui

[java] view plain copy print ?

<td class="dvtCellLabel">菜单图片</td>
<td class="dvtCellInfo">
<html:file property="iconFile" />
<html:hidden property="icon"/>
<logic:notEmpty name="menuSmartForm" property="icon">
<a href="${menuSmartForm.icon}" target="_blank">查看</a>
</logic:notEmpty>
d>

2. 如下为ACTION中的上传文件操做代码：spa

[java] view plain copy print ?

/**
* 文件上传
* @param form
* @param request
* @param isUpdate
* @return
* @throws Exception
*/
protected String simpleUpload(ActionForm form, HttpServletRequest request, boolean isUpdate) throws Exception {
MenuForm menuForm = (MenuForm) form;
String result="" ;
FormFile file = null;
FormFile[] files = new FormFile[]{menuForm.getIconFile(),menuForm.getBgImgFile()};
for (int i = 0; i < files.length; i++) {
file = files[i];
if (file != null && !file.getFileName().equals("")) {
String endName = FileUtil.getFileExt(file.getFileName());
if(!(endName.toUpperCase().equals("PNG")||endName.toUpperCase().equals("JPG")||endName.toUpperCase().equals("GIF"))){
log.info("上传的图标文件不是图片格式");
return null;
}
/*上至上传相对路径*/
String uploadPath = ("upload" + File.separator );
/*设置本地绝对路径*/
String uploadDir = servlet.getServletContext().getRealPath(uploadPath);
try {
/*建立文件流信息*/
File nwFile = new File(uploadDir);
/*判断是否存在改目录文件夹*/
if (!nwFile.exists())
nwFile.mkdirs();
long uid = System.currentTimeMillis();
/*获取文件后缀名*/
String fileExt = "." + endName;
String fname = uploadDir + File.separator + uid + fileExt;
InputStream streamIn = file.getInputStream();
OutputStream streamOut = new FileOutputStream(fname);
int bytesRead = 0;
byte[] buffer = new byte[8192];
/*开始写文件*/
while ((bytesRead = streamIn.read(buffer, 0, 8192)) != -1) {
streamOut.write(buffer, 0, bytesRead);
}
streamOut.close();
streamIn.close();
file.destroy();
String realName = "upload" + "/"+ uid + fileExt;
/*将真实的文件名设置到FORM中*/
if(i==0){
menuForm.setIcon(realName);
}
if(i==1){
menuForm.setBgImg(realName);
}
result = "upload" + File.separator + uid + fileExt;
} catch (Exception e) {
log.error("上传图片信息是发生异常:"+e);
return null;
}
}
}
return result;
}

/** * 文件上传 * @param form * @param request * @param isUpdate * @return * @throws Exception */ protected String simpleUpload(ActionForm form, HttpServletRequest request, boolean isUpdate) throws Exception { MenuForm menuForm = (MenuForm) form; String result="" ; FormFile file = null; FormFile[] files = new FormFile[]{menuForm.getIconFile(),menuForm.getBgImgFile()}; for (int i = 0; i < files.length; i++) { file = files[i]; if (file != null && !file.getFileName().equals("")) { String endName = FileUtil.getFileExt(file.getFileName()); if(!(endName.toUpperCase().equals("PNG")||endName.toUpperCase().equals("JPG")||endName.toUpperCase().equals("GIF"))){ log.info("上传的图标文件不是图片格式"); return null; } /*上至上传相对路径*/ String uploadPath = ("upload" + File.separator ); /*设置本地绝对路径*/ String uploadDir = servlet.getServletContext().getRealPath(uploadPath); try { /*建立文件流信息*/ File nwFile = new File(uploadDir); /*判断是否存在改目录文件夹*/ if (!nwFile.exists()) nwFile.mkdirs(); long uid = System.currentTimeMillis(); /*获取文件后缀名*/ String fileExt = "." + endName; String fname = uploadDir + File.separator + uid + fileExt; InputStream streamIn = file.getInputStream(); OutputStream streamOut = new FileOutputStream(fname); int bytesRead = 0; byte[] buffer = new byte[8192]; /*开始写文件*/ while ((bytesRead = streamIn.read(buffer, 0, 8192)) != -1) { streamOut.write(buffer, 0, bytesRead); } streamOut.close(); streamIn.close(); file.destroy(); String realName = "upload" + "/"+ uid + fileExt; /*将真实的文件名设置到FORM中*/ if(i==0){ menuForm.setIcon(realName); } if(i==1){ menuForm.setBgImg(realName); } result = "upload" + File.separator + uid + fileExt; } catch (Exception e) { log.error("上传图片信息是发生异常:"+e); return null; } } } return result; }

3. 若是还须要对文档进行解压缩操做，以及其余的操做，请参考本博客中标题为 “AJAX上传下载文件”的文章。.net