package com.qa.base; 
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Properties;
public class TestBase {
	
	public Properties prop;
	
	//寫一個構造函數(shù)
	public TestBase() {
		
		try {
			prop = new Properties();
			FileInputStream fis = new FileInputStream(System.getProperty("user.dir")+
 "/src/main/java/com/qa/config/config.properties");
			prop.load(fis);
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}		
	}	
}

package com.qa.restclient;
 
import java.io.IOException;
import java.util.HashMap;
import org.apache.http.Header;
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;
 
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
 
public class RestClient {
	
	
	//1. Get 請求方法
	public void get(String url) throws ClientProtocolException, IOException {
		
		//創(chuàng)建一個可關閉的HttpClient對象
		CloseableHttpClient httpclient = HttpClients.createDefault();
		//創(chuàng)建一個HttpGet的請求對象
		HttpGet httpget = new HttpGet(url);
		//執(zhí)行請求,相當于postman上點擊發(fā)送按鈕，然后賦值給HttpResponse對象接收
		CloseableHttpResponse httpResponse = httpclient.execute(httpget);
		
		//拿到Http響應狀態(tài)碼，例如和200,404,500去比較
		int responseStatusCode = httpResponse.getStatusLine().getStatusCode();
		System.out.println("response status code -->"+responseStatusCode);
		
		//把響應內容存儲在字符串對象
		String responseString = EntityUtils.toString(httpResponse.getEntity(),"UTF-8");
		
		//創(chuàng)建Json對象，把上面字符串序列化成Json對象
		JSONObject responseJson = JSON.parseObject(responseString);
		System.out.println("respon json from API-->" + responseJson);
		
		//獲取響應頭信息,返回是一個數(shù)組
		Header[] headerArray = httpResponse.getAllHeaders();
		//創(chuàng)建一個hashmap對象，通過postman可以看到請求響應頭信息都是Key和value得形式，所以我們想起了HashMap
		HashMap<String, String> hm = new HashMap<String, String>();
		//增強for循環(huán)遍歷headerArray數(shù)組，依次把元素添加到hashmap集合
		for(Header header : headerArray) {
			hm.put(header.getName(), header.getValue());
		}
		
		//打印hashmap
		System.out.println("response headers -->"+ hm);
		
	} 
}

package com.qa.tests;
 
import java.io.IOException;
 
import org.apache.http.client.ClientProtocolException;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;
 
import com.qa.base.TestBase;
import com.qa.restclient.RestClient;
 
public class GetApiTest extends TestBase{
	TestBase testBase;
	String host;
	String url;
	RestClient restClient;
	
	
	@BeforeClass
	public void setUp() {
		testBase = new TestBase();
		host = prop.getProperty("HOST");
		url = host + "/api/users";
		
	}
	
	@Test
	public void getAPITest() throws ClientProtocolException, IOException {
		restClient = new RestClient();
		restClient.get(url);
	}
}

[RemoteTestNG] detected TestNG version 6.14.3
response status code -->200
respon json from API-->{"per_page":3,"total":12,"data":[{"last_name":"Bluth","id":1,"avatar":"https://s3.amazonaws.com/uifaces/faces/twitter/calebogden/128.jpg","first_name":"George"},{"last_name":"Weaver","id":2,"avatar":"https://s3.amazonaws.com/uifaces/faces/twitter/josephstein/128.jpg","first_name":"Janet"},{"last_name":"Wong","id":3,"avatar":"https://s3.amazonaws.com/uifaces/faces/twitter/olegpogodaev/128.jpg","first_name":"Emma"}],"page":1,"total_pages":4}
response headers -->{Transfer-Encoding=chunked, Server=cloudflare, CF-RAY=41e822894b39336d-HKG, Access-Control-Allow-Origin=*, ETag=W/"1bb-D+c3sZ5g5u/nmLPQRl1uVo2heAo", Connection=keep-alive, Set-Cookie=__cfduid=d9d93dc43c046707f916670ef491f4c8e1526917157; expires=Tue, 21-May-19 15:39:17 GMT; path=/; domain=.reqres.in; HttpOnly, Date=Mon, 21 May 2018 15:39:17 GMT, Content-Type=application/json; charset=utf-8, X-Powered-By=Express, Expect-CT=max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"}
PASSED: getAPITest