Apache HttpComponents 获取inputStream

package org.apache.http.examples.client;



import java.io.IOException;

import java.io.InputStream;



import org.apache.http.HttpEntity;

import org.apache.http.HttpResponse;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpGet;

import org.apache.http.impl.client.DefaultHttpClient;



/**

 * This example demonstrates the recommended way of using API to make sure

 * the underlying connection gets released back to the connection manager.

 */

public class ClientConnectionRelease {



    public final static void main(String[] args) throws Exception {

        HttpClient httpclient = new DefaultHttpClient();

        try {

            HttpGet httpget = new HttpGet("http://www.apache.org/");



            // Execute HTTP request

            System.out.println("executing request " + httpget.getURI());

            HttpResponse response = httpclient.execute(httpget);



            System.out.println("----------------------------------------");

            System.out.println(response.getStatusLine());

            System.out.println("----------------------------------------");



            // Get hold of the response entity

            HttpEntity entity = response.getEntity();



            // If the response does not enclose an entity, there is no need

            // to bother about connection release

            if (entity != null) {

                InputStream instream = entity.getContent();

                try {

                    instream.read();

                    // do something useful with the response

                } catch (IOException ex) {

                    // In case of an IOException the connection will be released

                    // back to the connection manager automatically

                    throw ex;

                } catch (RuntimeException ex) {

                    // In case of an unexpected exception you may want to abort

                    // the HTTP request in order to shut down the underlying

                    // connection immediately.

                    httpget.abort();

                    throw ex;

                } finally {

                    // Closing the input stream will trigger connection release

                    try { instream.close(); } catch (Exception ignore) {}

                }

            }



        } finally {

            // When HttpClient instance is no longer needed,

            // shut down the connection manager to ensure

            // immediate deallocation of all system resources

            httpclient.getConnectionManager().shutdown();

        }

    }



}