java功能-发送http请求

一、发送json

    public void test() throws IOException {
        //参数封装------------------------------------------------------
        Map jsonMap = new HashMap();
        Map params1 = new HashMap();
        List params2=new ArrayList<>();
        //封装params1
        //封装params2
        //封装jsonMap
        jsonMap.put("sendBasic", params1);
        jsonMap.put("toUsers", params2);
        String json = JSON.toJSONString(jsonMap);
        //---建立连接---------------------------------------------------------------
        URL url = new URL("http://");//请求的路径
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setDoInput(true); // 设置可输入
        connection.setDoOutput(true); // 设置该连接是可以输出的
        connection.setRequestMethod("POST");// 设置请求方式
        connection.setRequestProperty("Charset", "UTF-8");
        connection.setRequestProperty("Accept-Charset", "utf-8");
        connection.setRequestProperty("Content-Type", "application/json;charset=utf-8");

        //发送参数---------------------------------------------------------------------------
        BufferedOutputStream pw = new BufferedOutputStream(connection.getOutputStream());
        //发送内容转码utf-8 **必写**
        pw.write(json.getBytes("UTF-8"));
        pw.flush();
        pw.close();
        //读取响应数据---------------------------------------------------------------------------
        //输入流转码utf-8  **必写**
        BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
        String line = null;
        StringBuilder result = new StringBuilder();
        while ((line = br.readLine()) != null) { // 读取数据
            result.append(line + "\n");
        }
    }
						  
					  
						
							


						

							
							
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