Httpclient入门代码

/**

 * Project Name:httpClient

 * File Name:Test.java

 * Package Name:httpClient

 * Date:2017年11月9日上午8:32:00

 * Copyright (c) 2017, [email protected] All Rights Reserved.

 *

*/

package httpClient;

import java.io.IOException;

import org.apache.http.Header;

import org.apache.http.HttpEntity;

import org.apache.http.client.ClientProtocolException;

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;

/**

 * ClassName:Test

 * Function: TODO ADD FUNCTION.

 * Reason:     TODO ADD REASON.

 * Date:     2017年11月9日 上午8:32:00

 * @author   michael

 * @version

 * @since    JDK 1.7

 * @see

 */

public class Test {

    public static void main(String[] args) throws Exception, IOException {

        CloseableHttpClient client = HttpClients.createDefault();

        //请求起始行

        HttpGet get= new HttpGet("http://www.sina.com.cn/");

        //请求首部--可选的，User-Agent对于一些服务器必选，不加可能不会返回正确结果

        get.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:39.0) Gecko/20100101 Firefox/39.0");

        //执行请求

        CloseableHttpResponse response = client.execute(get);

        //获得起始行

        System.out.println(response.getStatusLine().toString()+"\n");

        //获取首部

        Header[] hs =  response.getAllHeaders();

        for (Header header : hs) {

            System.out.println(header.getName()+"\t"+header.getValue()+"\n");

        }

        //获取实体

        HttpEntity entity = response.getEntity();

        System.out.println(EntityUtils.toString(entity,"utf-8"));

        EntityUtils.consume(entity);//释放实体

        response.close();

        client.close();

    }

}