Android-向服务器发送图片

Android 客户端

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);         /* 设置mButton的onClick事件处理 */            mButton = (Button) findViewById(R.id.myButton);         mButton.setOnClickListener(new View.OnClickListener()         {           public void onClick(View v)           {             uploadFile();           }         });       }       /* 上传文件至Server的方法 */       private void uploadFile()       {         String end = "\r\n";         String twoHyphens = "--";         String boundary = "*****";         try         {           URL url =new URL(actionUrl);           HttpURLConnection con=(HttpURLConnection)url.openConnection();           /* 允许Input、Output，不使用Cache */           con.setDoInput(true);           con.setDoOutput(true);           con.setUseCaches(false);           /* 设置传送的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);           /* 设置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);           /* 设置每次写入1024bytes */           int bufferSize = 1024;           byte[] buffer = new byte[bufferSize];           int length = -1;           /* 从文件读取数据至缓冲区 */           while((length = fStream.read(buffer)) != -1)           {             /* 将资料写入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内容 */           InputStream is = con.getInputStream();           int ch;           StringBuffer b =new StringBuffer();           while( ( ch = is.read() ) != -1 )           {             b.append( (char)ch );           }           /* 将Response显示于Dialog */           showDialog("上传成功"+b.toString().trim());           /* 关闭DataOutputStream */           ds.close();         }         catch(Exception e)         {           showDialog("上传失败"+e);         }       }       /* 显示Dialog的method */       private void showDialog(String mess)       {         new AlertDialog.Builder(PhotoUpload.this).setTitle("Message")          .setMessage(mess)          .setNegativeButton("确定",new DialogInterface.OnClickListener()          {            public void onClick(DialogInterface dialog, int which)            {                     }          })          .show();       }     }

 

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服务端

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);   // 设置允许用户上传文件大小,单位:字节            fu.setSizeThreshold(4096);   // 设置最多只允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(); // 依次处理每个上传的文件            while (iter.hasNext())            {                FileItem item = (FileItem)iter.next();// 忽略其他不是文件域的所有表单信息                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 //取出不是文件域的所有表单信息                {                    String fieldvalue = item.getString();             //如果包含中文应写为：(转为UTF-8编码)                    //String fieldvalue = new String(item.getString().getBytes(),"UTF-8");                }            }            String text1="11";            response.sendRedirect("result.jsp?text1=" + text1);     }