java后端模拟表单提交

代码可实现文本域及非文本域的处理

请求代码：

/** 
     * 上传
     *  
     * @param urlStr 
     * @param textMap 
     * @param fileMap 
     * @return 
     */  
    public static String formUpload(String urlStr, Map<String, String> textMap,  
            Map<String, String> fileMap) {  
        String res = "";  
        HttpURLConnection conn = null;  
        String BOUNDARY = "---------------------------123821742118716"; //boundary就是request头和上传文件内容的分隔符  
        try {  
            URL url = new URL(urlStr);  
            conn = (HttpURLConnection) url.openConnection();  
            conn.setConnectTimeout(5000);  
            conn.setReadTimeout(30000);  
            conn.setDoOutput(true);  
            conn.setDoInput(true);  
            conn.setUseCaches(false);  
            conn.setRequestMethod("POST");  
            conn.setRequestProperty("Connection", "Keep-Alive");  
            conn  
                    .setRequestProperty("User-Agent",  
                            "Mozilla/5.0 (Windows; U; Windows NT 6.1; zh-CN; rv:1.9.2.6)");  
            conn.setRequestProperty("Content-Type",  
                    "multipart/form-data; boundary=" + BOUNDARY);  
  
            OutputStream out = new DataOutputStream(conn.getOutputStream());  
            // text  
            if (textMap != null) {  
                StringBuffer strBuf = new StringBuffer();  
                Iterator iter = textMap.entrySet().iterator();  
                while (iter.hasNext()) {  
                    Map.Entry entry = (Map.Entry) iter.next();  
                    String inputName = (String) entry.getKey();  
                    String inputValue = (String) entry.getValue();  
                    if (inputValue == null) {  
                        continue;  
                    }  
                    strBuf.append("
").append("--").append(BOUNDARY).append(  
                            "
");  
                    strBuf.append("Content-Disposition: form-data; name=""  
                            + inputName + ""

");  
                    strBuf.append(inputValue);  
                }  
                out.write(strBuf.toString().getBytes());  
            }  
  
            // file  
            if (fileMap != null) {  
                Iterator iter = fileMap.entrySet().iterator();  
                while (iter.hasNext()) {  
                    Map.Entry entry = (Map.Entry) iter.next();  
                    String inputName = (String) entry.getKey();  
                    String inputValue = (String) entry.getValue();  
                    if (inputValue == null) {  
                        continue;  
                    }  
                    File file = new File(inputValue);  
                    String filename = file.getName();  
                    String contentType = new MimetypesFileTypeMap()  
                            .getContentType(file);  
                    if (filename.endsWith(".png")) {  
                        contentType = "image/png";  
                    }  
                    if (contentType == null || contentType.equals("")) {  
                        contentType = "application/octet-stream";  
                    }  
  
                    StringBuffer strBuf = new StringBuffer();  
                    strBuf.append("
").append("--").append(BOUNDARY).append(  
                            "
");  
                    strBuf.append("Content-Disposition: form-data; name=""  
                            + inputName + ""; filename="" + filename  
                            + ""
");  
                    strBuf.append("Content-Type:" + contentType + "

");  
  
                    out.write(strBuf.toString().getBytes());  
  
                    DataInputStream in = new DataInputStream(  
                            new FileInputStream(file));  
                    int bytes = 0;  
                    byte[] bufferOut = new byte[1024];  
                    while ((bytes = in.read(bufferOut)) != -1) {  
                        out.write(bufferOut, 0, bytes);  
                    }  
                    in.close();  
                }  
            }  
  
            byte[] endData = ("
--" + BOUNDARY + "--
").getBytes();  
            out.write(endData);  
            out.flush();  
            out.close();  
  
            // 读取返回数据  
            StringBuffer strBuf = new StringBuffer();  
            BufferedReader reader = new BufferedReader(new InputStreamReader(  
                    conn.getInputStream()));  
            String line = null;  
            while ((line = reader.readLine()) != null) {  
                strBuf.append(line).append("
");  
            }  
            res = strBuf.toString();  
            reader.close();  
            reader = null;  
        } catch (Exception e) {  
            System.out.println("发送POST请求出错。" + urlStr);  
            e.printStackTrace();  
        } finally {  
            if (conn != null) {  
                conn.disconnect();  
                conn = null;  
            }  
        }  
        return res;  
    }

　　处理上传请求代码：

/**
	 * 上传
	 * @param request
	 * @param response
	 * @throws Exception
	 */
	public void doUpload(HttpServletRequest request, HttpServletResponse response)throws Exception {
		String jsession = request.getParameter("jsessionid");
		System.out.println(jsession);
		HttpSession s = request.getSession();
		System.out.println(s.getId());
		DiskFileItemFactory factory = new DiskFileItemFactory();
		// 设置内存缓冲区，超过后写入临时文件
		factory.setSizeThreshold(10240000); 
		ServletFileUpload upload = new ServletFileUpload(factory);
		// 设置单个文件的最大上传值
		upload.setFileSizeMax(10002400000l);
		// 设置整个request的最大值
		upload.setSizeMax(10002400000l);
		upload.setHeaderEncoding("UTF-8");
		//Date now = new Date();
		Map map = new HashMap();
		File tmpFile = new File(tmpFilePath);
		if(!tmpFile.exists())
			tmpFile.mkdirs();
		List items = null;
		try {
			items = upload.parseRequest(request);
		} catch (FileUploadException e) {
			throw new RuntimeException(e);
		}
		if (items == null)
			return ;
		Date date = new Date();
		Iterator iter = items.iterator();

		String fileName = tmpFilePath + File.separator +date.getTime();

		while (iter.hasNext()) {// 循环获得每个表单项
			FileItem item = (FileItem) iter.next();
			if (item.isFormField()) {
				String name = item.getFieldName();
				try {
					String value = item.getString("utf-8");// 如果参数里面有中文，防止出现乱码
					map.put(name, value);
				} catch (UnsupportedEncodingException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}else if(item.getName().length() > 0) {
				String namefix = item.getName();
				namefix = namefix.substring(namefix.lastIndexOf("."));
				fileName = fileName +namefix;
				item.write(new File(fileName));
			}

		}
		String type =(String) map.get("type");
		if(type.equals("war")){
			request.getSession().setAttribute("warFileName",fileName);
		}else if(type.equals("sql")){
			request.getSession().setAttribute("sqlFileName",fileName);
		}
		try {
			map.put("data", fileName);
			response.getWriter().write(JsonUtils.convertToString(map));
		} catch (IOException e) {
			e.printStackTrace();
		}

	}

　　测试调用代码：

/** 
     * @param args 
     */  
    public static void main(String[] args) {  
          
        String filepath="D:\test\PPGhost.war";  
          
        String urlStr = "http://localhost:8080/iopm/version/add.do?method=upload";  
          
        Map<String, String> textMap = new HashMap<String, String>();  
      
        textMap.put("name", "testname");  
        textMap.put("type", "war");  
  
        Map<String, String> fileMap = new HashMap<String, String>();  
          
        fileMap.put("userfile", filepath);  
          
        String ret = formUpload(urlStr, textMap, fileMap);  
          
        System.out.println(ret);  
          
  
    }