<dependency>

         <groupId>commons-io</groupId>

         <artifactId>commons-io</artifactId>

         <version>2.5</version>

     </dependency>

 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

   <modelVersion>4.0.0</modelVersion>

   <groupId>com.javaxk</groupId>

   <artifactId>HttpClientTest</artifactId>

   <version>0.0.1-SNAPSHOT</version>

   <dependencies>

       <dependency>

         <groupId>org.apache.httpcomponents</groupId>

         <artifactId>httpclient</artifactId>

         <version>4.5.2</version>

     </dependency>

     <dependency>

         <groupId>commons-io</groupId>

         <artifactId>commons-io</artifactId>

         <version>2.5</version>

     </dependency>

   </dependencies>

 </project>

 package com.javaxk.httpclient.chap03;

 import java.io.File;

 import java.io.InputStream;

 import org.apache.commons.io.FileUtils;

 import org.apache.http.HttpEntity;

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

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

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

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

 public class Demo1 {

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

         CloseableHttpClient httpClient=HttpClients.createDefault(); // 创建httpClient实例

         HttpGet httpGet=new HttpGet("http://www.javaxk.com/templets/javaxk/images/logo.jpg"); // 创建httpget实例

         httpGet.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:50.0) Gecko/20100101 Firefox/50.0");

         CloseableHttpResponse response=httpClient.execute(httpGet); // 执行http get请求

         HttpEntity entity=response.getEntity(); // 获取返回实体

         if(entity!=null){

             System.out.println("ContentType:"+entity.getContentType().getValue());

             InputStream inputStream=entity.getContent();

             FileUtils.copyToFile(inputStream, new File("D://logo.jpg"));

         }

         response.close(); // response关闭

         httpClient.close(); // httpClient关闭

     }

 }