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("\r\n").append("--").append(BOUNDARY).append(
                            "\r\n");
                    strBuf.append("Content-Disposition: form-data; name=\""
                            + inputName + "\"\r\n\r\n");
                    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("\r\n").append("--").append(BOUNDARY).append(
                            "\r\n");
                    strBuf.append("Content-Disposition: form-data; name=\""
                            + inputName + "\"; filename=\"" + filename
                            + "\"\r\n");
                    strBuf.append("Content-Type:" + contentType + "\r\n\r\n");  

                    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 = ("\r\n--" + BOUNDARY + "--\r\n").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("\n");
            }
            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);  

    }