android上传图片至服务器

时间 2019-11-13

标签 android 上传图片服务器栏目 Android 繁體版

原文原文链接

本实例实现了android上传手机图片至服务器，服务器进行保存
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服务器servlet代码
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String temp=request.getSession().getServletContext().getRealPath("/")+"temp"; //临时目录
System.out.println("temp="+temp);
String loadpath=request.getSession().getServletContext().getRealPath("/")+"Image"; //上传文件存放目录
System.out.println("loadpath="+loadpath);
DiskFileUpload fu = new DiskFileUpload();
fu.setSizeMax(1*1024*1024); // 设置容许用户上传文件大小,单位:字节
fu.setSizeThreshold(4096); // 设置最多只容许在内存中存储的数据,单位:字节
fu.setRepositoryPath(temp); // 设置一旦文件大小超过getSizeThreshold()的值时数据存放在硬盘的目录
//开始读取上传信息
int index=0;
List fileItems = null;
try {
fileItems = fu.parseRequest(request);
System.out.println("fileItems="+fileItems);
} catch (Exception e) {
e.printStackTrace();
}
Iterator iter = fileItems.iterator(); // 依次处理每一个上传的文件
while (iter.hasNext())
{
FileItem item = (FileItem)iter.next();// 忽略其余不是文件域的全部表单信息
if (!item.isFormField())
{
String name = item.getName();//获取上传文件名,包括路径
name=name.substring(name.lastIndexOf("\\")+1);//从全路径中提取文件名
long size = item.getSize();
if((name==null||name.equals("")) && size==0)
continue;
int point = name.indexOf(".");
name=(new Date()).getTime()+name.substring(point,name.length())+index;
index++;
File fNew= new File(loadpath, name);
try {
item.write(fNew);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
else //取出不是文件域的全部表单信息
{
String fieldvalue = item.getString();
//若是包含中文应写为：(转为UTF-8编码)
//String fieldvalue = new String(item.getString().getBytes(),"UTF-8");
}
}
String text1="11";
response.sendRedirect("result.jsp?text1=" + text1);
}

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android客户端代码
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public class PhotoUpload extends Activity {
private String newName = "image.jpg";
private String uploadFile = "/sdcard/image.JPG";
private String actionUrl = "http://192.168.0.71:8086/HelloWord/myForm";
private TextView mText1;
private TextView mText2;
private Button mButton;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.photo_upload);
mText1 = (TextView) findViewById(R.id.myText2);
//"文件路径：\n"+
mText1.setText(uploadFile);
mText2 = (TextView) findViewById(R.id.myText3);
//"上传网址：\n"+
mText2.setText(actionUrl);
mButton = (Button) findViewById(R.id.myButton);
mButton.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
uploadFile();
}
});
}
private void uploadFile()
{
String end = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
try
{
URL url =new URL(actionUrl);
HttpURLConnection con=(HttpURLConnection)url.openConnection();
con.setDoInput(true);
con.setDoOutput(true);
con.setUseCaches(false);
con.setRequestMethod("POST");
con.setRequestProperty("Connection", "Keep-Alive");
con.setRequestProperty("Charset", "UTF-8");
con.setRequestProperty("Content-Type",
"multipart/form-data;boundary="+boundary);
DataOutputStream ds =
new DataOutputStream(con.getOutputStream());
ds.writeBytes(twoHyphens + boundary + end);
ds.writeBytes("Content-Disposition: form-data; " +
"name=\"file1\";filename=\"" +
newName +"\"" + end);
ds.writeBytes(end);
FileInputStream fStream = new FileInputStream(uploadFile);
int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
int length = -1;
while((length = fStream.read(buffer)) != -1)
{
ds.write(buffer, 0, length);
}
ds.writeBytes(end);
ds.writeBytes(twoHyphens + boundary + twoHyphens + end);
fStream.close();
ds.flush();
InputStream is = con.getInputStream();
int ch;
StringBuffer b =new StringBuffer();
while( ( ch = is.read() ) != -1 )
{
b.append( (char)ch );
}
showDialog("上传成功"+b.toString().trim());
ds.close();
}
catch(Exception e)
{
showDialog("上传失败"+e);
}
}
private void showDialog(String mess)
{
new AlertDialog.Builder(PhotoUpload.this).setTitle("Message")
.setMessage(mess)
.setNegativeButton("肯定",new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
}
})
.show();
}
}