android上傳圖片至服務器

本實例實現了android上傳手機圖片至服務器，服務器進行保存

服務器servlet代碼
publicvoid doPost(HttpServletRequest request, HttpServletResponse response)

           throws ServletException, IOException {


       String temp=request.getSession().getServletContext().getRealPath("/")+"temp";   //臨時目錄
       System.out.println("temp="+temp);
       String loadpath=request.getSession().getServletContext().getRealPath("/")+"Image"; //上傳文件存放目錄
       System.out.println("loadpath="+loadpath);
       DiskFileUpload fu =new DiskFileUpload();
       fu.setSizeMax(1*1024*1024);   // 設置允許用戶上傳文件大小,單位:字節
       fu.setSizeThreshold(4096);   // 設置最多只允許在內存中存儲的數據,單位:字節
       fu.setRepositoryPath(temp); // 設置一旦文件大小超過getSizeThreshold()的值時數據存放在硬盤的目錄

       //開始讀取上傳信息

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(); // 依次處理每個上傳的文件

while (iter.hasNext())
           {
               FileItem item = (FileItem)iter.next();// 忽略其他不是文件域的所有表單信息
if (!item.isFormField())
               {
                   String name = item.getName();//獲取上傳文件名,包括路徑
                   name=name.substring(name.lastIndexOf("\")+1);//從全路徑中提取文件名
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//取出不是文件域的所有表單信息
           {
               String fieldvalue = item.getString();
        //如果包含中文應寫為：(轉為UTF-8編碼)
               //String fieldvalue = new String(item.getString().getBytes(),"UTF-8");
           }
       }
       String text1="11";
       response.sendRedirect("result.jsp?text1="+ text1);
}  </pre></span>　<span style="border-collapse:collapse;font-family:Arial;color:#333333;" class="Apple-style-span">android客戶端代碼<pre class="brush:java; toolbar: true; auto-links: false;">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
  publicvoid onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.photo_upload);
    mText1 = (TextView) findViewById(R.id.myText2);
    //"文件路徑：\n"+
    mText1.setText(uploadFile);
    mText2 = (TextView) findViewById(R.id.myText3);
    //"上傳網址：\n"+
    mText2.setText(actionUrl);
    /* 設置mButton的onClick事件處理 */    
    mButton = (Button) findViewById(R.id.myButton);
    mButton.setOnClickListener(new View.OnClickListener()
    {
      publicvoid onClick(View v)
      {
        uploadFile();
      }
    });
  }
  /* 上傳文件至Server的方法 */
  privatevoid uploadFile()
  {
    String end ="\r\n";
    String twoHyphens ="--";
    String boundary ="*****";
    try
    {
      URL url =new URL(actionUrl);
      HttpURLConnection con=(HttpURLConnection)url.openConnection();
      /* 允許Input、Output，不使用Cache */
      con.setDoInput(true);
      con.setDoOutput(true);
      con.setUseCaches(false);
      /* 設置傳送的method=POST */
      con.setRequestMethod("POST");
      /* setRequestProperty */
      con.setRequestProperty("Connection", "Keep-Alive");
      con.setRequestProperty("Charset", "UTF-8");
      con.setRequestProperty("Content-Type",
                         "multipart/form-data;boundary="+boundary);
      /* 設置DataOutputStream */
      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);  
      /* 取得文件的FileInputStream */
      FileInputStream fStream =new FileInputStream(uploadFile);
      /* 設置每次寫入1024bytes */
      int bufferSize =1024;
      byte[] buffer =newbyte[bufferSize];
      int length =-1;
      /* 從文件讀取數據至緩沖區 */
      while((length = fStream.read(buffer)) !=-1)
      {
        /* 將資料寫入DataOutputStream中 */
        ds.write(buffer, 0, length);
      }
      ds.writeBytes(end);
      ds.writeBytes(twoHyphens + boundary + twoHyphens + end);
      /* close streams */
      fStream.close();
      ds.flush();
      /* 取得Response內容 */
      InputStream is = con.getInputStream();
      int ch;
      StringBuffer b =new StringBuffer();
      while( ( ch = is.read() ) !=-1 )
      {
        b.append( (char)ch );
      }
      /* 將Response顯示于Dialog */
      showDialog("上傳成功"+b.toString().trim());
      /* 關閉DataOutputStream */
      ds.close();
    }
    catch(Exception e)
    {
      showDialog("上傳失敗"+e);
    }
  }
  /* 顯示Dialog的method */
  privatevoid showDialog(String mess)
  {
    new AlertDialog.Builder(PhotoUpload.this).setTitle("Message")
     .setMessage(mess)
     .setNegativeButton("確定",new DialogInterface.OnClickListener()
     {
       publicvoid onClick(DialogInterface dialog, int which)
       {          
       }
     })
     .show();
  }
}</pre></span>