httpclient 之get方法（无参和有参）

httplient 执行接口测试，采用maven项目，pom.xml文件配置如下：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 <modelVersion>4.0.0</modelVersion>

 <groupId>httpclient</groupId>
 <artifactId>httpclient</artifactId>
 <version>1.0-SNAPSHOT</version>

 <dependencies>
 <dependency>
 <groupId>org.apache.httpcomponents</groupId>
 <artifactId>httpclient</artifactId>
 <version>4.3.6</version>
 </dependency>
 <dependency>
 <groupId>org.apache.httpcomponents</groupId>
 <artifactId>httpclient-cache</artifactId>
 <version>4.3.6</version>
 </dependency>
 <dependency>
 <groupId>org.apache.httpcomponents</groupId>
 <artifactId>httpmime</artifactId>
 <version>4.3.6</version>
 </dependency>

 <dependency>
 <groupId>org.json</groupId>
 <artifactId>json</artifactId>
 <version>20140107</version>
 </dependency>
 </dependencies>


</project>

httpclient 之get方法（无参和有参）

package httpclient;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.http.*;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
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.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import org.json.JSONObject;
/**
 * Created by jiangcui on 2018/5/18.
 */
public class HttpclientGet {
 public static void main(String[] args) {
 CloseableHttpClient httpClient = HttpClients.createDefault();
 //String html = "";
 String url1 = "http://www.baidu.com";
 String url2 = "http://www.sina.com";

 //发送get请求
 HttpGet httpGet = new HttpGet(url1);

 //设置了header 的参数，如果不需要，可以省略
 HashMap<String, String> headers = new HashMap<String, String>();
 headers.put("Accept", "*/*");
 headers.put("Accept-Encoding", "gzip, deflate, sdch");
 headers.put("Accept-Language", "zh-CN,zh;q=0.8");

 for (Map.Entry m : headers.entrySet()) {
 System.out.println(m.getKey() + "\t" + m.getValue());
 httpGet.setHeader(m.getKey().toString(), m.getValue().toString());
 }
 //配置请求超时设置
 RequestConfig requestConfig = RequestConfig.custom()
 .setConnectTimeout(5000) //设置连接超时时间
 .setConnectionRequestTimeout(5000) // 设置连接请求超时时间
 .setSocketTimeout(5000)
 .setRedirectsEnabled(true) //设置自动允许重定向
 .build();
 httpGet.setConfig(requestConfig);

 //获取 response内容
 try {
 CloseableHttpResponse closeableHttpResponse = httpClient.execute(httpGet);
 //获取响应状态码
 int statusCode = closeableHttpResponse.getStatusLine().getStatusCode();
 System.out.println(statusCode);

 if (closeableHttpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
 HttpEntity httpEntity = closeableHttpResponse.getEntity();
 String strResult = EntityUtils.toString(httpEntity);
 System.out.println(strResult);
 // 把字符串转换为json对象
 JSONObject jsonObject = new JSONObject(strResult);
 System.out.println(jsonObject);
 } else {
 String strResult = "Error Response: " + closeableHttpResponse.getStatusLine().toString();
 System.out.println(strResult);
 }

 } catch (ClientProtocolException e) {
 e.printStackTrace();
 } catch (ParseException e) {
 e.printStackTrace();
 } catch (IOException e) {
 e.printStackTrace();
 } finally {
 try {
 httpClient.close();
 } catch (IOException e) {
 e.printStackTrace();
 }

 //CloseableHttpClient httpClient2 = HttpClients.createDefault();

 //封装参数，get方法传递参数
 List<NameValuePair> param = new ArrayList<NameValuePair>();
 param.add(new BasicNameValuePair("username", "jiangcui"));
 param.add(new BasicNameValuePair("password", "pdmi1234"));

 try {
 UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(param, "utf-8");
 String str = EntityUtils.toString(urlEncodedFormEntity);
 System.out.println(str);
 }catch(IOException e){
 e.printStackTrace();
 }
 }

 try{
 //创建httpGet请求
 HttpGet httpGet2 = new HttpGet(url2);

 //执行httpGet请求
 CloseableHttpResponse closeableHttpResponse1 = httpClient.execute(httpGet2);
 int statusCode = closeableHttpResponse1.getStatusLine().getStatusCode();
 System.out.println(statusCode);


 if (closeableHttpResponse1.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
 HttpEntity httpEntity1 = closeableHttpResponse1.getEntity();
 String strResult1 = EntityUtils.toString(httpEntity1);
 System.out.println(strResult1);
 // 把字符串转换为json对象
 JSONObject jsonObject = new JSONObject(strResult1);
 //获取json串中的数据
 //String str = jsonObject.get("name").toString;

 //将json对象转化为字符串
 String jsonToString = jsonObject.toString();
 System.out.println(jsonToString);
 } else {
 String strResult = "Error Response: " + closeableHttpResponse1.getStatusLine().toString();
 System.out.println(strResult);
 }
 }catch (ClientProtocolException e) {
 e.printStackTrace();
 } catch (ParseException e) {
 e.printStackTrace();
 } catch (IOException e) {
 e.printStackTrace();
 } finally {
 try {
 httpClient.close();
 } catch (IOException e) {
 e.printStackTrace();
 }
 }
 }
 }