JAVA send post and GET request __java

public static string doget (string url) throws exception{
String result= "";
try {
SYSTEM.OUT.PRINTLN ("Send GET Request:" +url);
URL restserviceurl = new URL (URL);


HttpURLConnection httpconnection = (httpurlconnection) restserviceurl.openconnection ();
Httpconnection.setrequestmethod ("get");
Httpconnection.setrequestproperty ("Accept", "Application/json");


if (Httpconnection.getresponsecode ()!= 200) {
throw new RuntimeException ("HTTP get Request Failed with Error code:"
+ Httpconnection.getresponsecode ());
}


BufferedReader responsebuffer = new BufferedReader (New InputStreamReader (
(Httpconnection.getinputstream ()));


String output;



while (output = Responsebuffer.readline ())!= null) {
result = = output;
}


Httpconnection.disconnect ();


catch (Malformedurlexception e) {
E.printstacktrace ();
catch (IOException e) {
E.printstacktrace ();
}

return result;
}


public static string doPost (String URL, map<string, object> params) throws exception{
PrintWriter out = null;
BufferedReader in = null;
String result = "";
try {
URL realurl = new URL (URL);
Opening and linking to URLs
URLConnection conn = Realurl.openconnection ();
To set common request properties
Conn.setrequestproperty ("Accept", "*/*");
Conn.setrequestproperty ("Connection", "keep-alive");
Conn.setrequestproperty ("User-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ");
Send POST request must be set as follows two lines
Conn.setdooutput (TRUE);
Conn.setdoinput (TRUE);
Gets the output stream corresponding to the URLConnection object
out = new PrintWriter (Conn.getoutputstream ());
Send Request parameters
StringBuffer sb = new StringBuffer ();
For (String Key:params.keySet ()) {
Sb.append ("&" +key+ "=" +params.get (key));
}
Sb.deletecharat (0);
Out.print (SB);
Buffer of flush output stream
Out.flush ();
Defines the response of a bufferedreader input stream to read a 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 the finally block to turn off the output stream, the input stream
finally{
try{
if (out!=null) {
Out.close ();
}
if (in!=null) {
In.close ();
}
}
catch (IOException ex) {
Ex.printstacktrace ();
}
}
return result;


}