httpPost对JSON发送和接收

小灰灰 2022-09-26 03:55 343阅读 0赞

public static String postURL(String commString, String address, String encode) {
            String rec_string = "";
            URL url = null;
            HttpURLConnection urlConn = null;
            try {
    			/*得到url地址的URL类*/
                url = new URL(address);
    			/*获得打开需要发送的url连接*/
                urlConn = (HttpURLConnection) url.openConnection();
    			/*设置连接超时时间*/
                urlConn.setConnectTimeout(30000);
    			/*设置读取响应超时时间*/
                urlConn.setReadTimeout(30000);
    			/*设置post发送方式*/
                urlConn.setRequestMethod("POST");
    			/*发送commString*/
                urlConn.setDoOutput(true);
                urlConn.setDoInput(true);
                OutputStreamWriter out;
                out = new OutputStreamWriter(urlConn.getOutputStream(), encode);
                out.write(commString);
                out.flush();
                out.close();
    			/*发送完毕 获取返回流，解析流数据*/
                BufferedReader rd = new BufferedReader(new InputStreamReader(urlConn.getInputStream(), encode));
                StringBuffer sb = new StringBuffer();
                int ch;
                while ((ch = rd.read()) > -1) {
                    sb.append((char) ch);
                }
                rec_string = sb.toString().trim();
    			/*解析完毕关闭输入流*/
                rd.close();
            } catch (Exception e) {
    			/*异常处理*/
                rec_string = "-107";
                System.out.println(e);
            } finally {
                if (urlConn != null) {
    				/*关闭URL连接*/
                    urlConn.disconnect();
                }
            }
    		/*返回响应内容*/
            return rec_string;
        }

上面是另一种方式的请求

下面是httpost：

HTTPPost发送JSON：

![None.gif][] private  static  final String APPLICATION\_JSON = "application/json";  
![None.gif][]      
![None.gif][]     private  static  final String CONTENT\_TYPE\_TEXT\_JSON = "text/json";  
![None.gif][]  
![ExpandedBlockStart.gif][] public  static  void httpPostWithJSON(String url, String json)  throws Exception \{  
![InBlock.gif][]         //  将JSON进行UTF-8编码,以便传输中文   
![InBlock.gif][]        String encoderJson = URLEncoder.encode(json, HTTP.UTF\_8);  
![InBlock.gif][]          
![InBlock.gif][]        DefaultHttpClient httpClient =  new DefaultHttpClient();  
![InBlock.gif][]        HttpPost httpPost =  new HttpPost(url);  
![InBlock.gif][]        httpPost.addHeader(HTTP.CONTENT\_TYPE, APPLICATION\_JSON);  
![InBlock.gif][]          
![InBlock.gif][]        StringEntity se =  new StringEntity(encoderJson);  
![InBlock.gif][]        se.setContentType(CONTENT\_TYPE\_TEXT\_JSON);  
![InBlock.gif][]        se.setContentEncoding( new BasicHeader(HTTP.CONTENT\_TYPE, APPLICATION\_JSON));  
![InBlock.gif][]        httpPost.setEntity(se);  
![InBlock.gif][]        httpClient.execute(httpPost);  
![ExpandedBlockEnd.gif][]    \}

接收HTTPPost中的JSON:

![ExpandedBlockStart.gif][] public  static String receivePost(HttpServletRequest request)  throws IOException, UnsupportedEncodingException \{  
![InBlock.gif][]          
![InBlock.gif][]         //  读取请求内容   
![InBlock.gif][]        BufferedReader br =  new BufferedReader( new InputStreamReader(request.getInputStream()));  
![InBlock.gif][]        String line =  null;  
![InBlock.gif][]        StringBuilder sb =  new StringBuilder();  
![ExpandedSubBlockStart.gif][]         while((line = br.readLine())!= null)\{  
![InBlock.gif][]            sb.append(line);  
![ExpandedSubBlockEnd.gif][]        \}  
![InBlock.gif][]  
![InBlock.gif][]         //  将资料解码   
![InBlock.gif][]        String reqBody = sb.toString();  
![InBlock.gif][]         return URLDecoder.decode(reqBody, HTTP.UTF\_8);  
![ExpandedBlockEnd.gif][]    \}

[None.gif]: /images/20220717/f96c091447a240ecb911d1471334ee7d.png
[ExpandedBlockStart.gif]: /images/20220717/149434c12db44150b9e982888194db4a.png
[InBlock.gif]: /images/20220717/3b12430257214e9ebcec82a5ac5170cc.png
[ExpandedBlockEnd.gif]: /images/20220717/f7f925f4662c4e848a6724db8e6098b6.png
[ExpandedSubBlockStart.gif]: /images/20220717/75daa7bb75944c8e95f319f48720e0b2.png
[ExpandedSubBlockEnd.gif]: /images/20220717/b2bd0264cc4848e4b8fc65f1ed594bf3.png