設置請求頭信息User-Agent來模擬瀏覽器。java
先來看User-Agent:apache
當咱們向服務器發送請求時,瀏覽器會將一些頭信息附加上,而後發給服務器。瀏覽器
如上圖所示頭信息(請求頭信息 Request Headers)服務器
咱們的代碼:ui
package com.zhi.httpClient2; 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; public class Demo { public static void main(String[] args) throws Exception { CloseableHttpClient closeableHttpClient=HttpClients.createDefault(); //一、建立實例 HttpGet httpGet=new HttpGet("http://www.tuicool.com"); //二、建立請求 httpGet.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.122 Safari/537.36 SE 2.X MetaSr 1.0"); CloseableHttpResponse closeableHttpResponse=closeableHttpClient.execute(httpGet); //三、執行 HttpEntity httpEntity=closeableHttpResponse.getEntity(); //四、獲取實體 System.out.println(EntityUtils.toString(httpEntity, "utf-8")); //五、獲取網頁內容,而且指定編碼 closeableHttpResponse.close(); closeableHttpClient.close(); } }
httpGet.setHeader(String key,String value);編碼
參數是鍵值對的形式3d