HTTP protocol sends JSON string request

package post;

import Java.io.BufferedReader;

import java.io.IOException;

import Java.io.InputStreamReader;

import Java.io.PrintWriter;

import Java.net.URL;

import java.net.URLConnection;

Public class dotest {

/**

* Request Connection Fixed parameters

* @param s pass-through address

*/

Public Static URLConnection getconnection (String s) throws IOException {

URL url = new URL (s);

URLConnection conn = Url.openconnection ();

Conn.setrequestproperty ("Accept", "Application/json"); Set the format for receiving data

Conn.setrequestproperty ("Content-type", "Application/json"); Format the sending data

return Conn;

}

Request address with interface address, request parameter is a JSON string, for example as follows:

Request Address: Http://127.0.0.1:8080/test/testone

Request parameter: {

"Testone": "Testname1",

"Testtwo": "Testname2"

//              }

/**

* POST Request

* @param s pass-through address and interface

* @param param request Parameters

* @return return response results

* @throws IOException Throw exception

*/

Public Static String Reqpost (string s, string param) throws IOException {

System. out. println ("Request address:" +s);

System. out. println ("Request parameter:" +param);

String res = "";

URLConnection conn = getconnection(s); Post request URL does not contain request parameters

Conn.setdooutput (true); These two request properties must be set to true to indicate that the default is to use post to send

Conn.setdoinput (true);

The request parameter must use conn to obtain the OutputStream output to the request body parameter

PrintWriter out = new printwriter (Conn.getoutputstream ()); Packaging with a PrintWriter

Out.println (param);

Out.flush (); Immediately swipe to the request body) PrintWriter default is written in the memory cache first

try//Send a normal request (get resources)

{

BufferedReader in = new BufferedReader (

New InputStreamReader (Conn.getinputstream (), "Utf-8"));

String Line;

while (line = In.readline ()) = null) {

Res + = line + "\ n";

}

} catch (Exception e) {

System. out. println ("Get Error occured!");

E.printstacktrace ();

}

return Res;

}

}

HTTP protocol sends JSON string request