使用HttpClient进行远程接口测试

前两天在工作中，项目组长给我了一个远程接口让我给测一下，因为是http协议，所以我首先想到了用httpClient工具类来测试，网上一查，找到了好多示例代码，随便复制了一个demo进行了简单的修改，结果怎么测试都是连接超时，试了很多个demo也不好使，最后发现是因为我们公司访问外网是通过代理，所以在进行测试的时候需要配置代理。一下是我的测试程序

用到的jar包：

package com.lym.test;

import org.apache.http.HttpEntity;
import org.apache.http.HttpHost;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;

import com.google.gson.JsonObject;

public class HttpClientTest {
    
    public static void main(String args[]) throws Exception {
        
        // 创建HttpClientBuilder
        HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();
        // HttpClient
        CloseableHttpClient closeableHttpClient = httpClientBuilder.build();
        // 依次是目标请求地址，端口号,协议类型
        HttpHost target = new HttpHost("61.144.244.6:8888/sztmerchant/merchant/addIsztMerchant.htm", 8888, "http");
        // 依次是代理地址，代理端口号，协议类型
        HttpHost proxy = new HttpHost("proxy3.bj.petrochina", 8080, "http");
        RequestConfig config = RequestConfig.custom().setProxy(proxy).build();

        // 请求地址
        HttpPost httpPost = new HttpPost("http://61.144.244.6:8888/sztmerchant/merchant/addIsztMerchant.htm");
        // 设置头信息
        httpPost.addHeader("Content-type", "application/json; charset=utf-8");
        httpPost.setHeader("Accept", "application/json");
        httpPost.setConfig(config);
        
        // 创建参数json串
        JsonObject jsonObj = new JsonObject();
        jsonObj.addProperty("merchantNo", "33300911238");
        jsonObj.addProperty("merchantName", "电商运营生产测试1238");
        String jsonStr = jsonObj.toString();
        System.out.println("parameters: " + jsonStr);
        
        StringEntity entity;
        try {
            entity = new StringEntity(jsonStr, "UTF-8");
            httpPost.setEntity(entity);
            CloseableHttpResponse response = closeableHttpClient.execute(target, httpPost);
            // getEntity()
            HttpEntity httpEntity = response.getEntity();
            if (httpEntity != null) {
                // 打印响应内容
                System.out.println("result: " + EntityUtils.toString(httpEntity, "UTF-8"));
            }else {
                System.out.println("无响应内容");
            }
            // 释放资源
            if(closeableHttpClient != null) {
                closeableHttpClient.close();                
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    
}