Java Implementation POST request (Postmethod)

Project requirements: Implement a POST request, and the request format is in JSON format.

Maven Dependency Packages

<dependency> <groupId>org.apache.httpcomponents</groupId> <artifactid>httpclient</ artifactid> <version>4.5.3</version> </dependency> <dependency> <groupId> Commons-httpclient</groupid> <artifactId>commons-httpclient</artifactId> <version>3.1 </version> </dependency>

Java Code Implementation:

Httpclient httpclient = new httpclient (); Httpclient.getparams (). SetContentCharset ("UTF-8") ; Postmethod method = new postmethod (URL); string str =  "{\ r \ n"  +      "\" begindate\ ": \" 2017-11-01\ ", \ r \ n"  +      "\" enddate\ ": \" 2017-11-01\ "\ r \ n"  +      "}"; Requestentity entity = new stringrequestentity (str, "Application/json", "UTF-8"); Method.setrequestentity (entity); Httpclient.executemethod (method);inputstream in =  Method.getresponsebodyasstream ();//Convert stream to Stringstringbuffer sb = new stringbuffer () below ; Inputstreamreader isr = new inputstreamreader (in,  "UTF-8"); char[] b =  new char[4096];for (int n;  (N = isr.read (b))  != -1;)  {     sb.append (new string (b, 0, n));     } stRing returnstr = sb.tostring ();  system.out.println (RETURNSTR); 

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Java Implementation POST request (Postmethod)