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Java爬虫.入门小实例：

今天看视频跟着大神进行爬取CSDN上的主页面，感觉很牛的样子，分享以下，哈哈~~

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     4.0.0
        
    
     cn.itcast
        
    
     itcast-crawler-first
        
    
     1.0-SNAPSHOT
    //这里开始是从网上maven官网借套的~~    
            
             
                 
      
       org.apache.httpcomponents
                  
      
       httpclient
                  
      
       4.5.2
              
             
             
                 
      
       org.slf4j
                  
      
       slf4j-log4j12
                  
      
       1.7.25
                  
      
       test
              
         
    
   

package cn.itsast.crawlar.test;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 java.io.IOException;public class CrawlarFirst {       public static void main(String[] args) throws IOException {           // 1.打开浏览器，创建HttpClient对象        CloseableHttpClient httpClient = HttpClients.createDefault();        // 2.输入网址,创建HttpGet对象        String url = "https://www.csdn.net/";        HttpGet httpGet = new HttpGet(url);        // 3.回车键，请求，响应,使用HttpClient对象发起请求        CloseableHttpResponse response = httpClient.execute(httpGet);        // 4.解析响应，获取数据        // 判断状态码是否为200        if (response.getStatusLine().getStatusCode() == 200) {               HttpEntity httpEntity = response.getEntity();            String content = EntityUtils.toString(httpEntity, "utf8");            System.out.println(content);        }    }}

结果：