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, 2692613726@qq.com 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();
    }
}