目标获取博客园的标题与口号：https://www.cnblogs.com/

HTML：代码：

    
        
        
            
            
        
        
        
                
    
        
     
            
      
                
       
        代码改变世界
       
                
       
        
       
                
       
            
      
        
     
        
     
            
      
      
      
            
      
                
       
                    
        
                                            
                
       
                
       
            
      
            
      
      
      
        
     
    

pom.xml

        
             
      
       org.apache.httpcomponents
              
      
       httpclient
              
      
       4.5.2
          
         
         
             
      
       org.jsoup
              
      
       jsoup
              
      
       1.10.2
          
     
    

代码：

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;import org.apache.http.util.EntityUtils;import org.jsoup.Jsoup;import org.jsoup.nodes.Document;import org.jsoup.nodes.Element;import org.jsoup.select.Elements;public class HttpClientjsouDemo01 {    public static void main(String[] args) throws Exception {        //创建实例化对象        CloseableHttpClient httpClient = HttpClients.createDefault();        //创建实例化对象httpget        HttpGet httpGet = new HttpGet("http://www.cnblogs.com/");        //执行get请求        CloseableHttpResponse response = httpClient.execute(httpGet);        //返回实体整个网页内容        HttpEntity entity = response.getEntity();        String toString = EntityUtils.toString(entity,"utf-8");        response.close();//关闭请求流释放系统资源                //解析网页，得到文档对象        Document doc = Jsoup.parse(toString);        //获取tag 是title的所有dom元素        Elements elements = doc.getElementsByTag("title");        //获取第一个元素        Element element = elements.get(0);        //返回元素的文本        String text = element.text();        System.out.println("网页标题是:"+elements);        Element element2=doc.getElementById("site_nav_top"); // 获取id=site_nav_top的DOM元素        String navTop=element2.text(); // 返回元素的文本        System.out.println("口号："+navTop);    }}

运行结果：

网页标题是:口号：代码改变世界Process finished with exit code 0