java中GET方式提交和POST方式提交

java中GET方式提交的示例：

       /**
        * 获取关注列表;
        * @return
        */
       @SuppressWarnings("unchecked")
       public static ArrayList<String> getUserList() {

            StringBuffer bufferRes = new StringBuffer();

            ArrayList<String> users = null;

            try {

                    URL realUrl = new URL("https://api.weixin.qq.com/cgi-bin/user/get?access_token=" + TokenProxys.accessTokens());
                    //URL realUrl = new URL("https://api.weixin.qq.com/cgi-bin/user/tag/get?access_token=" + TokenProxys.accessTokens());

                    HttpURLConnection conn = (HttpURLConnection)realUrl.openConnection();

                    // 请求方式

                    conn.setDoOutput(true);

                    conn.setDoInput(true);

                    conn.setRequestMethod("GET");

                    conn.setUseCaches(false);

                    conn.setInstanceFollowRedirects(true);

                    conn.setRequestProperty("Content-Type","application/json");

                    conn.connect();

                    // 获取URLConnection对象对应的输入流

                    InputStream in =conn.getInputStream();

                    BufferedReader read =new BufferedReader(new InputStreamReader(in,"UTF-8"));

                    String valueString =null;

                    while ((valueString=read.readLine())!=null){

                            bufferRes.append(valueString);

                    }

                    System.out.println(bufferRes);

                    in.close();

                    if (conn !=null){

                        // 关闭连接

                        conn.disconnect();

                    }

            } catch (Exception e) {

                    e.printStackTrace();

            }

            //将返回的字符串转换成json

            JSONObject jsonObject = JSONObject.fromObject(bufferRes.toString());

            //解析json中表示openid的列表

            JSONObject data = (JSONObject)jsonObject.get("data");

            if(data!=null){

              //将openid列表转化成数组保存

              users = new ArrayList<String>(data.getJSONArray("openid"));

              //获取关注者总数

              int count = Integer.parseInt(jsonObject.get("total").toString());

              if(count>1000){

                 JSONObject object = jsonObject;

                 String next_openid = null;

                 JSONObject ob_data = null;

                 ArrayList<String> ob_user = null;

                 //大于1000需要多次获取，或许次数为count/1000

                 for(int i=0;i<count/1000;i++){

                    //解析出下次获取的启示openid

                    next_openid = object.get("next_openid").toString();

                    object = getUserJson(next_openid);

                    ob_data = (JSONObject)object.get("data");

                    ob_user = new ArrayList<String>(ob_data.getJSONArray("openid"));

                    for(String open_id : ob_user){

                        //将多次获取的openid添加到同一个数组

                        users.add(open_id);

                    }

                }

              }

            }

            return users;

       }

java中POST方式提交的示例1：

    public static void main(String[] args) {
        try {
            String pathUrl = "https://api.weixin.qq.com/cgi-bin/user/tag/get?access_token=zN6OKXWAdBKdwPUc1CFXIW-czck3W1CURoKr38Xy7jjDpyIxrpmSyfglAY1Bnvq3FePZbFVUzpeLfWC9lml7ENeApBJhSDXE-BRrHCmBsTk4gUI6DxxDgrGekrdkUSDkETAhAGAZOV";
            // 建立连接
            URL url = new URL(pathUrl);
            HttpURLConnection httpConn = (HttpURLConnection) url.openConnection(); 

            // //设置连接属性
            httpConn.setDoOutput(true);// 使用 URL 连接进行输出
            httpConn.setDoInput(true);// 使用 URL 连接进行输入
            httpConn.setUseCaches(false);// 忽略缓存
            httpConn.setRequestMethod("POST");// 设置URL请求方法
            //POST请求设置所需要的JSON数据格式{"tagid" : 134,"next_openid":""//第一个拉取的OPENID，不填默认从头开始拉取}
            List<Map<String,Object>> list = new ArrayList<Map<String,Object>>();
            Map<String, Object> map = new HashMap<String, Object>();
            map.put("tagid", 104);
            map.put("next_openid","");
            list.add(map);
            JSONArray arry=JSONArray.fromObject(map);
            String requestString = arry.toString().replace("[", "").replace("]", "");

            // 设置请求属性
            // 获得数据字节数据，请求数据流的编码，必须和下面服务器端处理请求流的编码一致
            byte[] requestStringBytes = requestString.getBytes("utf-8");
            httpConn.setRequestProperty("Content-length", "" + requestStringBytes.length);
            httpConn.setRequestProperty("Content-Type", "application/octet-stream");
            httpConn.setRequestProperty("Connection", "Keep-Alive");// 维持长连接
            httpConn.setRequestProperty("Charset", "UTF-8"); 

            // 建立输出流，并写入数据，此方法是同样适用于参数中有文字的方法
            OutputStream outputStream = httpConn.getOutputStream();
            outputStream.write(requestStringBytes);
            outputStream.close();
            // 获得响应状态
            int responseCode = httpConn.getResponseCode(); 

            if (HttpURLConnection.HTTP_OK == responseCode) {// 连接成功
                // 当正确响应时处理数据
                StringBuffer sb = new StringBuffer();
                String readLine;
                BufferedReader responseReader;
                // 处理响应流，必须与服务器响应流输出的编码一致
                 responseReader = new BufferedReader(new InputStreamReader(httpConn.getInputStream(), "utf-8"));
                while ((readLine = responseReader.readLine()) != null) {
                sb.append(readLine).append("\n");
                }
                responseReader.close();
                System.err.println(sb.toString());
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        } 

    }    

post请求向服务器传递参数的另外一种形式，示例2：

服务器端接受参数：String datas= request.getParameter("datas");

public static void sendPost() throws IOException{
        List<Map<String,Object>> list = new ArrayList<Map<String,Object>>();
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("phone", "phone");
        list.add(map);
        JSONArray arry=JSONArray.fromObject(map);
        String requestString = arry.toString();

        String result="";
        PrintWriter out = null;
        BufferedReader in = null;
        String pathUrl = "http://shuilangyizu.iask.in/app/appWechatDataController/wchatInfo.do";
        URL url=null;
         try {
             url = new URL(pathUrl);
             URLConnection connect = url.openConnection();
             connect.setRequestProperty("content-type","application/x-www-form-urlencoded;charset=utf-8");
             connect.setRequestProperty("method","POST");
             byte[] bytes= requestString.getBytes("utf-8") ;
             connect.setDoOutput(true);
             connect.setDoInput(true);  

             out = new PrintWriter(connect.getOutputStream());
             // 发送请求参数：此方式遇到中文容易乱码，所以如果参数中有中文建议用上一种方式
             out.print("datas="+requestString);
             out.flush();  
             // 定义BufferedReader输入流来读取URL的响应
             in = new BufferedReader(new InputStreamReader(connect.getInputStream()));
             String line;
             while ((line = in.readLine()) != null) {
                 result +=  line;
             }
             System.out.println(result); 

　　　　　　　 in.close();　　　　　　　
 　　　　　　  out.close();

} catch (Exception e) { // TODO Auto-generated catch block  e.printStackTrace(); } }

接收数据服务器上接收数据的方式，示例1：

@RequestMapping(value = "/synSystemData")
    public void synSystemData(HttpServletRequest request, HttpServletResponse response) throws Exception {
        boolean isGet = request.getMethod().toLowerCase().equals("get");
        if (!isGet) {
            String inputLine;
            String notityJson = "";
            try {
                while ((inputLine = request.getReader().readLine()) != null) {
                    notityJson += inputLine;
                }
                request.getReader().close();
            } catch (Exception e) {
                e.printStackTrace();
            }
            if(StringUtil.isEmpty(notityJson )){
                notityJson = request.getParameter("content");
            }
            String json= java.net.URLDecoder.decode(notityJson , "UTF-8");
            if(StringUtils.isNotEmpty(json)){
                StringBuffer sb = new StringBuffer(); 
　　　　　　　　  sb.append("ok"); 
                response.getWriter().write(sb.toString());
            }

        }
　　　　 wirte.flush();            
        wirte.close();
    }    

接收数据服务器上接收数据的方式，示例2：

/**
     * 接收从发送数据服务器传过来的json串
     * @param request
     * @param response
     * @throws Exception
     */
    @RequestMapping(value = "/synSystemData")
    public void synSystemData(HttpServletRequest request, HttpServletResponse response) throws Exception{
        String result = "error";
        boolean isPost = request.getMethod().toLowerCase().equals("post");
        PrintWriter wirte = null;
        wirte = response.getWriter();
        response.setCharacterEncoding("utf-8");
        response.setContentType("text/html;charset=utf-8");

        if (isPost) {
            String json = request.getParameter("datas");
            System.out.println(json);
            wirte.print(result);
        }else{
            wirte.print("");
        }
        wirte.flush();
        wirte.close();
    }