本文共 4596 字，大约阅读时间需要 15 分钟。

httpclient获取url响应信息Demo，两种方式：

pom.xml

   
       
    
     4.0.0
        
    
     dtwave_pro
        
    
     com.dtwave.pros
        
    
     1.0-SNAPSHOT
        
            
             
                 
      
       org.apache.httpcomponents
                  
      
       httpclient
                  
      
       4.5.3
              
             
                 
      
       com.alibaba
                  
      
       fastjson
                  
      
       1.2.24
              
             
                 
      
       org.apache.commons
                  
      
       commons-lang3
                  
      
       3.8.1
              
             
             
                 
      
       org.apache.commons
                  
      
       commons-io
                  
      
       1.3.2
              
             
             
                 
      
       org.apache.hive
                  
      
       hive-exec
                  
      
       1.2.1
                  
      
       provided
              
             
             
                 
      
       junit
                  
      
       junit
                  
      
       3.8.1
                  
      
       test
              
         
        
            
     
                  
                      
                           
        
         maven-clean-plugin
                            
        
         3.0.0
                        
                       
                       
                           
        
         maven-resources-plugin
                            
        
         3.0.2
                        
                       
                           
        
         maven-compiler-plugin
                            
        
         3.7.0
                        
                       
                           
        
         maven-surefire-plugin
                            
        
         2.20.1
                        
                       
                           
        
         maven-jar-plugin
                            
        
         3.0.2
                        
                       
                           
        
         maven-install-plugin
                            
        
         2.5.2
                        
                       
                           
        
         maven-deploy-plugin
                            
        
         2.8.2
                        
                   
              
             
                 
                      
       
        maven-assembly-plugin
                       
                           
         
                            
         
         
          jar-with-dependencies
          
                        
                       
                           
         
         
          make-assembly
          
         
          package
          
          
          
           single
           
          
                        
                   
              
         
    
   

get和post请求：

package com.dtwave.duruo;import org.apache.commons.io.IOUtils;import org.apache.http.HttpResponse;import org.apache.http.client.HttpClient;import org.apache.http.client.methods.CloseableHttpResponse;import org.apache.http.client.methods.HttpGet;import org.apache.http.client.methods.HttpPost;import org.apache.http.impl.client.CloseableHttpClient;import org.apache.http.impl.client.HttpClients;import java.io.IOException;import java.io.InputStream;public class HttpClientDemo {    public static void main(String[] args) {        System.out.println(doGetMethod("http://www.baidu.com"));        System.out.println(doPostMethod("http://www.baidu.com"));    }    // get请求    public static String doGetMethod(String url){        // 获取httpclient对象        CloseableHttpClient httpclient = HttpClients.createDefault();        // 创建GET请求        // String url = "http://www.baidu.com";        HttpGet hg = new HttpGet(url);        // 设置参数        hg.addHeader("Content-Type", "text/html;charset=utf-8");        String result = null;        try {            CloseableHttpResponse response = httpclient.execute(hg);            InputStream in = response.getEntity().getContent();            result = IOUtils.toString(in);            // 关闭流            in.close();            response.close();        } catch (Exception e) {            e.printStackTrace();        }        return result ;    }    // post请求方法    public static String doPostMethod(String url){        String res = null;        // 获取httpclient对象        CloseableHttpClient httpclient = HttpClients.createDefault();        // 创建POST请求        // String url = "http://www.baidu.com";        HttpPost hp = new HttpPost(url);        hp.addHeader("Content-Type", "text/html;charset=utf-8");        //        try {            CloseableHttpResponse chr = httpclient.execute(hp);            InputStream in = chr.getEntity().getContent();            res = IOUtils.toString(in);        } catch (Exception e) {            e.printStackTrace();        }        return res;    }}