Java sends a GET, POST request for HTTP

Java sends a GET, POST request for HTTP

HTTP Request Class

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 {/** * a request to send a GET method to a specified URL * * @param URL * Send the requested URL * @param pa     RAM * Request parameters, request parameters should be in the form of name1=value1&name2=value2.        * The response result of the remote resource represented by the @return URL */public static string Sendget (string URL, string param) {string result = "";        BufferedReader in = null;            try {String urlnamestring = URL + "?" + param;            URL realurl = new URL (urlnamestring);            The connection between open and URL urlconnection connection = Realurl.openconnection ();            Set the generic 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 ();            Get all response header fields Map<string, list<string>> Map = Connection.getheaderfields (); Traverse all response header fields for (String Key:map.keySet ()) {System.out.println (key + "--->" + map.get (key            ));                    }//define BufferedReader input stream to read the response of the URL in = new BufferedReader (New InputStreamReader (            Connection.getinputstream ()));            String Line;            while (line = In.readline ()) = null) {result + = line; }} 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.clos                E ();          }} catch (Exception E2) {e2.printstacktrace ();  }} return result;            /** * Request to send a POST method to the specified URL * * @param URL * Send the requested URL * @param param *     Request parameters, request parameters should be in the form of name1=value1&name2=value2.        * The 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 ();            Set the generic 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 corresponding to the URLConnection object out = new PrintWriter (Conn.getoutputstream ());     Send request parameter out.print (param);            Flush output Stream Buffer Out.flush (); Defines the BufferedReader input stream to read the response of the URL in = new BufferedReader (New InputStreamReader (conn.getinput            Stream ()));            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 close the 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);    }
Transfer from http://www.cnblogs.com/zhuawang/archive/2012/12/08/2809380.html

Java sends a GET, POST request for HTTP