Run ClientWithResponseHandler.java HttpComponents Client Example
Q
How to run the ClientWithResponseHandler.java HttpComponents Client Example? I have httpcomponents-client-4.5.3-bin.zip installed.
✍: FYIcenter.com
A
If you have httpcomponents-client-4.5.3-bin.zip installed,
you can follow this tutorial to run the ClientWithResponseHandler.java HttpComponents Client Example:
1. Open the example program file ClientWithResponseHandler.java from \fyicenter\httpcomponents-client-4.5.3\examples\org\apache\http\examples\client folder:
/*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* ...
*/
package org.apache.http.examples.client;
import java.io.IOException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
/**
* This example demonstrates the use of the {@link ResponseHandler} to simplify
* the process of processing the HTTP response and releasing associated resources.
*/
public class ClientWithResponseHandler {
public final static void main(String[] args) throws Exception {
CloseableHttpClient httpclient = HttpClients.createDefault();
try {
HttpGet httpget = new HttpGet("http://httpbin.org/");
System.out.println("Executing request " + httpget.getRequestLine());
// Create a custom response handler
ResponseHandler<String> responseHandler = new ResponseHandler<String>() {
@Override
public String handleResponse(
final HttpResponse response) throws ClientProtocolException, IOException {
int status = response.getStatusLine().getStatusCode();
if (status >= 200 && status < 300) {
HttpEntity entity = response.getEntity();
return entity != null ? EntityUtils.toString(entity) : null;
} else {
throw new ClientProtocolException("Unexpected response status: " + status);
}
}
};
String responseBody = httpclient.execute(httpget, responseHandler);
System.out.println("----------------------------------------");
System.out.println(responseBody);
} finally {
httpclient.close();
}
}
}
2. Compile and run the example with Java SE 8 JDK:
\fyicenter\httpcomponents-client-4.5.3\examples>\fyicenter\jdk-1.8.0\bin\javac
-cp ..\lib\httpclient-4.5.3.jar;..\lib\httpcore-4.4.6.jar
org\apache\http\examples\client\ClientWithResponseHandler.java
\fyicenter\httpcomponents-client-4.5.3\examples>\fyicenter\jdk-1.8.0\bin\java
-cp .\;..\lib\httpclient-4.5.3.jar;..\lib\httpcore-4.4.6.jar;..\lib\commons-logging-1.2.jar
org.apache.http.examples.client.ClientWithResponseHandler
> output.txt
\fyicenter\httpcomponents-client-4.5.3\examples>type output.txt | more
Executing request GET http://httpbin.org/ HTTP/1.1
----------------------------------------
<!DOCTYPE html>
<html>
<head>
<meta http-equiv='content-type' value='text/html;charset=utf8'>
<meta name='generator' value='Ronn/v0.7.3 (http://github.com/rtomayko/ronn/tre
e/0.7.3)'>
<title>httpbin(1): HTTP Client Testing Service</title>
<style type='text/css' media='all'>
/* style: man */
body#manpage {margin:0}
...
⇒ Run ClientChunkEncodedPost.java HttpComponents Client Example
⇐ Run QuickStart.java HttpComponents Client Example
2017-11-02, ∼2346🔥, 0💬
