Sending a POST Request in Java

[Sheenas]

Hello, I am learning java programming language and while learning it I want to know the details about the Sending a POST Request in java. I have search this on internet and got some details which are of no use. If you are having some useful contents then please reply me about the same. I will be thankful to you.

[Katty]

For sending a POST Request in java you need to use the code below :

try { 
String str = URLEncoder.encode("KeyOne", "UTF-8") + "=" + URLEncoder.encode("value1", "UTF-8"); 
str += "&" + URLEncoder.encode("KeyTwo", "UTF-8") + "=" + URLEncoder.encode("value2", "UTF-8"); 
URL url = new URL("http://hostname:80/cgi"); 
URLConnection urlconnection = url.openConnection(); 
urlconnection.setDoOutput(true); 
OutputStreamWriter outputstreamwriter = new OutputStreamWriter(urlconnection.getOutputStream()); 
outputstreamwriter.outputstreamwriterite(str); outputstreamwriter.flush(); 
BufferedReader bufferedreader = new BufferedReader(new InputStreamReader(urlconnection.getInputStream())); 
String strline; 
while ((strline = bufferedreader.readLine()) != null) 
{ 
} 
outputstreamwriter.close(); 
bufferedreader.close(); 
} 
catch (Exception e) 
{
 }

[kelfro]

The Hypertext Transfer Protocol (HTTP) is the most ubiquitous of the Internet protocols. Although seen primarily as a means to fetch pages of Hypertext Markup Language (HTML) content for display in a web browser, HTTP is really a general-purpose transport for any type of data. That versatility is why HTTP support is a fundamental feature of the Mobile Information Device Profile (MIDP). In fact, on many devices HTTP is the only network protocol available. HTTP is a request-response protocol. Various types of requests are possible, each identified by a different HTTP method. MIDP supports two of those methods, GET and POST. In general, you'll use POST requests to transfer data from a MIDP client to a web server, because the web server doesn't log the data you send, and you can send binary data - handy for transferring byte arrays or serialized Java objects. You also avoid the limits on URL length that GET requests face if they include too many query parameters.

[Zecho]

Hey, you can simply make use of the code below for post request in java:

import com.POSTsoft.*;
public class postRequest {
  static {
    try {
        System.loadLibrary("POST");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Code Error.\n" + e);
      System.exit(1);
    }
  }
  public static void main(String argv[])
  {
    CkHttpRequest request = new CkHttpRequest();
    CkHttp checkHttp = new CkHttp();
    boolean complete;
    complete = checkHttp.UnlockComponent("All");
    if (complete != true) {
        System.out.println(checkHttp.lastErrorText());
        return;
    }
    request.UsePost();
    request.put_Path("/testPostHandler.asp");
    request.AddParam("arg1","Value for arg1.");
    request.AddParam("arg2","Value for arg2.");
    request.AddParam("arg3","Value for arg3.");
    String domain;
    int port;
    boolean ssl;
    domain = "www.TechArena.in";
    port = 80;
    ssl = false;
    CkHttpResponse resp;
    resp = checkHttp.SynchronousRequest(domain,port,ssl,request);
    if (resp == null ) {
        System.out.println(checkHttp.lastErrorText());
    }
    else {
        System.out.println(resp.bodyStr());
    }

  }
}

[Reegan]

Hello, while searching on the sending a POST Request in java I have got the code below. You will get the information from it:

import org.apache.commons.httphttpclient.HttpClient;
import org.apache.commons.httphttpclient.HttpStatus;
import org.apache.commons.httphttpclient.postmethods.PostMethod;
import java.io.BufferedReader;
import java.io.InputStreamReader;
public class PostMethodExample {
  public static void main(String args[]) {
    HttpClient httpclient = new HttpClient();
    httpclient.getParams().setParameter("http.useragent", "Test Client");
    BufferedReader bufferedreader = null;
    PostMethod postmethod = new PostMethod("http://<site name>");
    postmethod.addParameter("p", "\"TA\"");
    try{
      int rCode = httpclient.executeMethod(postmethod);
      if(rCode == HttpStatus.SC_NOT_IMPLEMENTED) {
        System.err.println("The Post postmethod is not implemented by this URI");
        postmethod.getResponseBodyAsString();
      } else {
        bufferedreader = new BufferedReader(new InputStreamReader(postmethod.getResponseBodyAsStream()));
        String readLine;
        while(((readLine = bufferedreader.readLine()) != null)) {
          System.err.println(readLine);
      }
      }
    } catch (Exception e) {
      System.err.println(e);
    } finally {
      postmethod.releaseConnection();
      if(bufferedreader != null) try { bufferedreader.close(); 
} 
catch (Exception fe)
 {}
    }

  }
}