Java send HTTP GET, POST request implementation code _java

HTTP Request Classes

Package Wzh.

Http;
Import Java.io.BufferedReader;
Import java.io.IOException;
Import Java.io.InputStreamReader;
Import Java.io.PrintWriter;
Import Java.net.URL;
Import java.net.URLConnection;
Import java.util.List;

Import Java.util.Map;      public class HttpRequest {/** * request to send a GET method to the specified URL * * @param URL * Send the requested URL * @param param *
   Request parameter, the request parameter should be the form of name1=value1&name2=value2.
    * @return The response result of the remote resource represented by the URL/public static string Sendget (string URL, string param) {String results = "";
    BufferedReader in = null;
      try {String urlnamestring = URL + '? ' + param;
      URL realurl = new URL (urlnamestring);
      The connection between open and URL urlconnection connection = Realurl.openconnection ();
      Sets the common request attribute Connection.setrequestproperty ("accept", "*/*");
      Connection.setrequestproperty ("Connection", "keep-alive"); Connection.setrequestproperty ("User-agent", "mozilla/4.0" (compatible; MSIE 6.0; Windows NT 5.1;
 SV1) ");     Establish the actual connection connection.connect ();
      Gets all response header fields Map<string, list<string>> Map = Connection.getheaderfields ();
      Iterate through all the response header fields for (String Key:map.keySet ()) {System.out.println (key +---> + map.get (key)); }//define BufferedReader input stream to read URL response in = new BufferedReader (New InputStreamReader Connection.getinpu
      Tstream ()));
      String Line;
      while (line = In.readline ())!= null) {result + = line; The catch (Exception e) {System.out.println ("Send GET request exception!
      "+ e);
    E.printstacktrace ();
        ///Use finally block to close the input stream finally {try {if (in!= null) {in.close ();
      } catch (Exception E2) {e2.printstacktrace ();
  } return result; /** * Request * Send the Post method to the specified URL * * @param URL * Send the requested URL * @param param * Request parameters, request parameters should be name1
   The form of =value1&name2=value2. * Response result of the remote resource represented by the @return * * pUblic static string sendpost (string url, string param) {printwriter out = null;
    BufferedReader in = null;
    String result = "";
      try {URL realurl = new URL (URL);
      The connection between open and URL URLConnection conn = realurl.openconnection ();
      Sets the common request attribute Conn.setrequestproperty ("accept", "*/*");
      Conn.setrequestproperty ("Connection", "keep-alive"); Conn.setrequestproperty ("User-agent", "mozilla/4.0" (compatible; MSIE 6.0; Windows NT 5.1;
      SV1) ");
      The Send POST request must be set to the following two lines conn.setdooutput (true);
      Conn.setdoinput (TRUE);
      Gets the output stream of the URLConnection object = new PrintWriter (Conn.getoutputstream ());
      Send request parameter out.print (param);
      Flush output Stream Buffer Out.flush ();
      Defines the response of the BufferedReader input stream to read the URL in = new BufferedReader (New InputStreamReader (Conn.getinputstream ()));
      String Line;
      while (line = In.readline ())!= null) {result + = line;
 } catch (Exception e) {     SYSTEM.OUT.PRINTLN ("Send POST request exception!)
      "+e);
    E.printstacktrace ();
        ///Use finally block to turn off output stream, input stream finally{try{if (out!=null) {out.close ();
        } if (In!=null) {in.close ();
      } catch (IOException ex) {ex.printstacktrace ();
  } return result; }  
}

Call Method:

public static void Main (string[] args) {
    //Send GET request
    String s=httprequest.sendget ("http://localhost:6144/Home/ RequestString "," key=123&v=456 ");
    System.out.println (s);
    
    Send POST request
    String sr=httprequest.sendpost ("http://localhost:6144/Home/RequestPostString", "key=123&v=456 ");
    System.out.println (SR);
  }

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