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
複製代碼

1. 服務器servlet代碼
2. public void doPost(HttpServletRequest request, HttpServletResponse response)  
3.            throws ServletException, IOException {  
4.             
5.            String temp=request.getSession().getServletContext().getRealPath("/")+"temp";   //臨時目錄
6.            System.out.println("temp="+temp);
7.            String loadpath=request.getSession().getServletContext().getRealPath("/")+"Image"; //上傳文件存放目錄
8.            System.out.println("loadpath="+loadpath);
9.            DiskFileUpload fu = new DiskFileUpload();
10.            fu.setSizeMax(1*1024*1024);   // 設置容許用戶上傳文件大小,單位:字節
11.            fu.setSizeThreshold(4096);   // 設置最多隻容許在內存中存儲的數據,單位:字節
12.            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
13.           
14.            //開始讀取上傳信息
15.            int index=0;
16.            List fileItems = null;
17.                 
18.                         
19.                                 try {
20.                                         fileItems = fu.parseRequest(request);
21.                                          System.out.println("fileItems="+fileItems);
22.                                 } catch (Exception e) {
23.                                         e.printStackTrace();
24.                                 }
25.                         
26.                 
27.            Iterator iter = fileItems.iterator(); // 依次處理每一個上傳的文件
28.            while (iter.hasNext())
29.            {
30.                FileItem item = (FileItem)iter.next();// 忽略其餘不是文件域的全部表單信息
31.                if (!item.isFormField())
32.                {
33.                    String name = item.getName();//獲取上傳文件名,包括路徑
34.                    name=name.substring(name.lastIndexOf("\\")+1);//從全路徑中提取文件名
35.                    long size = item.getSize();
36.                    if((name==null||name.equals("")) && size==0)
37.                          continue;
38.                    int point = name.indexOf(".");
39.                    name=(new Date()).getTime()+name.substring(point,name.length())+index;
40.                    index++;
41.                    File fNew= new File(loadpath, name);
42.                    try {
43.                                         item.write(fNew);
44.                                 } catch (Exception e) {
45.                                         // TODO Auto-generated catch block
46.                                         e.printStackTrace();
47.                                 }
48.                   
49.                   
50.                }
51.                else //取出不是文件域的全部表單信息
52.                {
53.                    String fieldvalue = item.getString();
54.             //若是包含中文應寫爲：(轉爲UTF-8編碼)
55.                    //String fieldvalue = new String(item.getString().getBytes(),"UTF-8");
56.                }
57.            }
58.            String text1="11";
59.            response.sendRedirect("result.jsp?text1=" + text1);
60.     }  

複製代碼
android客戶端代碼
複製代碼

1. public class PhotoUpload extends Activity {
2.     private String newName = "image.jpg";
3.     private String uploadFile = "/sdcard/image.JPG";
4.     private String actionUrl = "http://192.168.0.71:8086/HelloWord/myForm";
5.     private TextView mText1;
6.     private TextView mText2;
7.     private Button mButton;
8. 
   
9.     @Override
10.       public void onCreate(Bundle savedInstanceState)
11.       {
12.         super.onCreate(savedInstanceState);
13.         setContentView(R.layout.photo_upload);
14. 
    
15.         mText1 = (TextView) findViewById(R.id.myText2);
16.         //"文件路徑：\n"+
17.         mText1.setText(uploadFile);
18.         mText2 = (TextView) findViewById(R.id.myText3);
19.         //"上傳網址：\n"+
20.         mText2.setText(actionUrl);
21.             
22.         mButton = (Button) findViewById(R.id.myButton);
23.         mButton.setOnClickListener(new View.OnClickListener()
24.         {
25.           public void onClick(View v)
26.           {
27.             uploadFile();
28.           }
29.         });
30.       }
31. 
    
32.       
33.       private void uploadFile()
34.       {
35.         String end = "\r\n";
36.         String twoHyphens = "--";
37.         String boundary = "*****";
38.         try
39.         {
40.           URL url =new URL(actionUrl);
41.           HttpURLConnection con=(HttpURLConnection)url.openConnection();
42.           
43.           con.setDoInput(true);
44.           con.setDoOutput(true);
45.           con.setUseCaches(false);
46.           
47.           con.setRequestMethod("POST");
48.           
49.           con.setRequestProperty("Connection", "Keep-Alive");
50.           con.setRequestProperty("Charset", "UTF-8");
51.           con.setRequestProperty("Content-Type",
52.                              "multipart/form-data;boundary="+boundary);
53.           
54.           DataOutputStream ds =
55.             new DataOutputStream(con.getOutputStream());
56.           ds.writeBytes(twoHyphens + boundary + end);
57.           ds.writeBytes("Content-Disposition: form-data; " +
58.                         "name=\"file1\";filename=\"" +
59.                         newName +"\"" + end);
60.           ds.writeBytes(end);  
61. 
    
62.           
63.           FileInputStream fStream = new FileInputStream(uploadFile);
64.           
65.           int bufferSize = 1024;
66.           byte[] buffer = new byte[bufferSize];
67. 
    
68.           int length = -1;
69.           
70.           while((length = fStream.read(buffer)) != -1)
71.           {
72.             
73.             ds.write(buffer, 0, length);
74.           }
75.           ds.writeBytes(end);
76.           ds.writeBytes(twoHyphens + boundary + twoHyphens + end);
77. 
    
78.           
79.           fStream.close();
80.           ds.flush();
81. 
    
82.           
83.           InputStream is = con.getInputStream();
84.           int ch;
85.           StringBuffer b =new StringBuffer();
86.           while( ( ch = is.read() ) != -1 )
87.           {
88.             b.append( (char)ch );
89.           }
90.           
91.           showDialog("上傳成功"+b.toString().trim());
92.           
93.           ds.close();
94.         }
95.         catch(Exception e)
96.         {
97.           showDialog("上傳失敗"+e);
98.         }
99.       }
100. 
     
101.       
102.       private void showDialog(String mess)
103.       {
104.         new AlertDialog.Builder(PhotoUpload.this).setTitle("Message")
105.          .setMessage(mess)
106.          .setNegativeButton("肯定",new DialogInterface.OnClickListener()
107.          {
108.            public void onClick(DialogInterface dialog, int which)
109.            {          
110.            }
111.          })
112.          .show();
113.       }
114.     }