HttpClient中帶參數的get請求

直接代碼：

package cn.itcast.crawler.test;
import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.net.URISyntaxException;

public class HttpGetParamTest {
    public static void main(String[] args) throws Exception {
        //1.創建HttpClient對象
          CloseableHttpClient httpClient= HttpClients.createDefault();
          //要求：設置請求的地址是：http://yun.itheima.com/search?keys=java
        //創建URLBuilder
        URIBuilder uriBuilder=new URIBuilder("http://yun.itheima.com/search");
        //設置參數
        uriBuilder.setParameter("keys","java");
          //2.創建HttpGet對象，設置URL地址
        HttpGet httpGet=new HttpGet(uriBuilder.build());
        System.out.println("發送請求的信息："+httpGet);
        //使用httpClient發起響應獲取repsonse
        CloseableHttpResponse response=null;
        try {
            response=httpClient.execute(httpGet);
            //4.解析響應，獲取數據
            //判斷狀態碼是否是200
            if(response.getStatusLine().getStatusCode()==200){
                HttpEntity httpEntity=response.getEntity();
                String content=EntityUtils.toString(httpEntity,"utf8");
                System.out.println(content.length());
            }
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                response.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
            try {
                httpClient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }
}
執行結果：

 

 有上面的結果可以知道，發送的是一個get請求，並且是參數的；

//創建URLBuilder
        URIBuilder uriBuilder=new URIBuilder("http://yun.itheima.com/search");
        //設置參數
        uriBuilder.setParameter("keys","java");
上面兩行代碼是帶參數的主要代碼，這是帶一個參數，當我們需要帶兩個或兩個以上的參數時，代碼如下：

uriBuilder.setParameter("keys","java").setParameter("","");
在后面直接添加就可以了