HttpClient详细使用示例

曾经终败给现在 2023-06-12 15:27 8阅读 0赞

# HttpClient #

博客地址：[https://blog.csdn.net/justry\_deng/article/details/81042379][https_blog.csdn.net_justry_deng_article_details_81042379]

HttpClientUtil封装的工具类

github:[https://github.com/Arronlong/httpclientutil][https_github.com_Arronlong_httpclientutil]

## HttpClient作者封装的工具类 ##

###   GET无参工具类 ###

package com.xiaomin.wechat.util;
    
    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.HttpClientBuilder;
    import org.apache.http.util.EntityUtils;
    
    import java.io.IOException;
    
    /**
     * @author 晓敏
     * @create 2019-11-15 10:22
     */
    public class HttpGetUtil {
    
        /**
         * GET无参工具类
         * @param url 接口地址
         * @return 调用接口后返回的结果
         */
        public static String doGet(String url){
            String result="";
            CloseableHttpResponse response=null;
            // 1、获得Http客户端(可以理解为:你得先有一个浏览器;注意:实际上HttpClient与浏览器是不一样的)
            CloseableHttpClient httpClient = HttpClientBuilder.create().build();
            ///2、创建Get请求
            HttpGet httpGet = new HttpGet(url);
            try {
                // 3、由客户端执行(发送)Get请求
                 response = httpClient.execute(httpGet);
                ///4、从响应模型中获取响应实体
                HttpEntity entity = response.getEntity();
                result = EntityUtils.toString(entity,"utf-8");//响应的内容进行编码
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                try {
                    if(httpClient!=null){//关闭连接
                        httpClient.close();
                    }
                    if(response!=null){//关闭
                        response.close();
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return result;
        }
    }

测试结果：

@Test
        public void fun2(){
            String result = HttpGetUtil.doGet("http://localhost:8081/getfirst");
            System.out.println(result);
        }

![2019111510465081.png][]

[https_blog.csdn.net_justry_deng_article_details_81042379]: https://blog.csdn.net/justry_deng/article/details/81042379
[https_github.com_Arronlong_httpclientutil]: https://github.com/Arronlong/httpclientutil
[2019111510465081.png]: https://img-blog.csdnimg.cn/2019111510465081.png