網上找的模擬POST提交上傳圖片類

import java.io.BufferedReader;
import java.io.File;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.Socket;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;

public class SocketHttpRequester {
    
     /**
     * 直接通過HTTP協議提交數據到服務器,實現如下面表單提交功能:
     *   <FORM METHOD=POST ACTION="http://192.168.1.101:8083/upload/servlet/UploadServlet" enctype="multipart/form-data">
            <INPUT TYPE="text" NAME="name">
            <INPUT TYPE="text" NAME="id">
            <input type="file" name="imagefile"/>
            <input type="file" name="zip"/>
         </FORM>
     * @param path 上傳路徑(注：避免使用localhost或127.0.0.1這樣的路徑測試，因為它會指向手機模擬器，你可以使用http://www.iteye.cn或http://192.168.1.101:8083這樣的路徑測試)
     * @param params 請求參數 key為參數名,value為參數值
     * @param file 上傳文件
     */
    public static boolean post(String path, Map<String, String> params, FormFile[] files) throws Exception{     
        final String BOUNDARY = "---------------------------7da2137580612"; //數據分隔線
        final String endline = "--" + BOUNDARY + "--\r\n";//數據結束標志
        
        int fileDataLength = 0;
        for(FormFile uploadFile : files){//得到文件類型數據的總長度
            StringBuilder fileExplain = new StringBuilder();
             fileExplain.append("--");
             fileExplain.append(BOUNDARY);
             fileExplain.append("\r\n");
             fileExplain.append("Content-Disposition: form-data;name=\""+ uploadFile.getParameterName()+"\";filename=\""+ uploadFile.getFilname() + "\"\r\n");
             fileExplain.append("Content-Type: "+ uploadFile.getContentType()+"\r\n\r\n");
             fileExplain.append("\r\n");
             fileDataLength += fileExplain.length();
            if(uploadFile.getInStream()!=null){
                fileDataLength += uploadFile.getFile().length();
             }else{
                 fileDataLength += uploadFile.getData().length;
             }
        }
        StringBuilder textEntity = new StringBuilder();
        for (Map.Entry<String, String> entry : params.entrySet()) {//構造文本類型參數的實體數據
            textEntity.append("--");
            textEntity.append(BOUNDARY);
            textEntity.append("\r\n");
            textEntity.append("Content-Disposition: form-data; name=\""+ entry.getKey() + "\"\r\n\r\n");
            textEntity.append(entry.getValue());
            textEntity.append("\r\n");
        }
        //計算傳輸給服務器的實體數據總長度
        int dataLength = textEntity.toString().getBytes().length + fileDataLength +  endline.getBytes().length;
        
        URL url = new URL(path);
        int port = url.getPort()==-1 ? 80 : url.getPort();
        Socket socket = new Socket(InetAddress.getByName(url.getHost()), port);           
        OutputStream outStream = socket.getOutputStream();
        //下面完成HTTP請求頭的發送
        String requestmethod = "POST "+ url.getPath()+" HTTP/1.1\r\n";
        outStream.write(requestmethod.getBytes());
        String accept = "Accept: image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*\r\n";
        outStream.write(accept.getBytes());
        String language = "Accept-Language: zh-CN\r\n";
        outStream.write(language.getBytes());
        String contenttype = "Content-Type: multipart/form-data; boundary="+ BOUNDARY+ "\r\n";
        outStream.write(contenttype.getBytes());
        String contentlength = "Content-Length: "+ dataLength + "\r\n";
        outStream.write(contentlength.getBytes());
        String alive = "Connection: Keep-Alive\r\n";
        outStream.write(alive.getBytes());
        String host = "Host: "+ url.getHost() +":"+ port +"\r\n";
        outStream.write(host.getBytes());
        //寫完HTTP請求頭后根據HTTP協議再寫一個回車換行
        outStream.write("\r\n".getBytes());
        //把所有文本類型的實體數據發送出來
        outStream.write(textEntity.toString().getBytes());           
        //把所有文件類型的實體數據發送出來
        for(FormFile uploadFile : files){
            StringBuilder fileEntity = new StringBuilder();
             fileEntity.append("--");
             fileEntity.append(BOUNDARY);
             fileEntity.append("\r\n");
             fileEntity.append("Content-Disposition: form-data;name=\""+ uploadFile.getParameterName()+"\";filename=\""+ uploadFile.getFilname() + "\"\r\n");
             fileEntity.append("Content-Type: "+ uploadFile.getContentType()+"\r\n\r\n");
             outStream.write(fileEntity.toString().getBytes());
             if(uploadFile.getInStream()!=null){
                 byte[] buffer = new byte[1024];
                 int len = 0;
                 while((len = uploadFile.getInStream().read(buffer, 0, 1024))!=-1){
                     outStream.write(buffer, 0, len);
                 }
                 uploadFile.getInStream().close();
             }else{
                 outStream.write(uploadFile.getData(), 0, uploadFile.getData().length);
             }
             outStream.write("\r\n".getBytes());
        }
        //下面發送數據結束標志，表示數據已經結束
        outStream.write(endline.getBytes());
        
        BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        if(reader.readLine().indexOf("200")==-1){//讀取web服務器返回的數據，判斷請求碼是否為200，如果不是200，代表請求失敗
            return false;
        }
        outStream.flush();
        outStream.close();
        reader.close();
        socket.close();
        return true;
    }
    
    /**
     * 提交數據到服務器
     * @param path 上傳路徑(注：避免使用localhost或127.0.0.1這樣的路徑測試，因為它會指向手機模擬器，你可以使用http://www.itcast.cn或http://192.168.1.10:8080這樣的路徑測試)
     * @param params 請求參數 key為參數名,value為參數值
     * @param file 上傳文件
     */
    public static boolean post(String path, Map<String, String> params, FormFile file) throws Exception{
       return post(path, params, new FormFile[]{file});
    }
    
    public static void main(String[] args) {
          File imageFile=new File("D:/m.jpg");
          String requestUrl = "http://192.168.0.29:8080/api/club/topicadd.do";
          //請求普通信息
          Map<String, String> params = new HashMap<String, String>();
          params.put("m", "save");
          params.put("Title", "Android上傳文件至服務器");
          params.put("Content", "本實例實現每隔5秒上傳一次，通過服務器端獲取手機上傳過來的文件信息並做相應處理；采用Android+Struts技術。");
          //上傳文件
          FormFile formfile = new FormFile(imageFile.getName(), imageFile, "file", "application/octet-stream");
          try {
            SocketHttpRequester.post(requestUrl, params, formfile);
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}