HttpClient的使用(get、post请求)
添加依赖
HttpClient是java提供的与服务端http接口进行交互的库
方式一:
下载:https://hc.apache.org/downloads.cgi
选择二进制zip包
然后解压
如果是idea,把lib目录加入到Libraries中,如果是eclipse,lib目录复制到项目下,Build Path --> Add to Build Path
方式二:添加pom依赖
<!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient --> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.5.6</version> </dependency>
get请求
package com.qzcsbj; import org.apache.http.HttpResponse; import org.apache.http.client.HttpClient; 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 java.io.IOException; import java.util.HashMap; import java.util.Map; import java.util.Set; /** * @公众号 : 全栈测试笔记 * @博客 : www.cnblogs.com/uncleyong * @微信 : ren168632201 * @描述 : <> */ public class HttpGetRequest { public static void main(String[] args) { String url = "http://127.0.0.1:9999/download"; String fname = "qzcsbj.txt"; Map<String, String> params = new HashMap<String, String>(); params.put("fname", fname); String res = getRequest(url, params); System.out.println("获取到的结果为:" + res); } public static String getRequest(String url, Map<String,String> params){ String res = ""; boolean flag = true; Set<String> keys = params.keySet(); for (String key : keys) { if (flag){ url += "?" + key + "=" + params.get(key); flag = false; }else { url += "&" + key + "=" + params.get(key); } } HttpGet httpGet = new HttpGet(url); HttpClient httpClient = HttpClients.createDefault(); try { HttpResponse response = httpClient.execute(httpGet); res = EntityUtils.toString(response.getEntity()); } catch (IOException e) { e.printStackTrace(); } return res; } }
post请求
k-v
package com.qzcsbj; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpPost; 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 java.io.IOException; import java.io.UnsupportedEncodingException; import java.util.ArrayList; import java.util.HashMap; import java.util.Map; import java.util.Set; /** * @公众号 : 全栈测试笔记 * @博客 : www.cnblogs.com/uncleyong * @微信 : ren168632201 * @描述 : <> */ public class HttpPostRequest { public static void main(String[] args) { String url = "http://127.0.0.1:9999/login"; HashMap<String, String> params = new HashMap<String, String>(); String username = "qzcsbj"; String password = "123456"; params.put("username", username); params.put("password", password); String res = postRequest(url, params); System.out.println("获取到的结果为:" + res); } public static String postRequest(String url, Map<String,String> params){ String res = ""; HttpPost httpPost = new HttpPost(url); ArrayList<BasicNameValuePair> basicNameValuePairs = new ArrayList<BasicNameValuePair>(); Set<String> keys = params.keySet(); for (String key : keys) { basicNameValuePairs.add(new BasicNameValuePair(key,params.get(key))); } try { httpPost.setEntity(new UrlEncodedFormEntity(basicNameValuePairs,"utf-8")); HttpClient httpClient = HttpClients.createDefault(); HttpResponse httpResponse = httpClient.execute(httpPost); res = EntityUtils.toString(httpResponse.getEntity()); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return res; } }
json
package com.qzcsbj; import com.alibaba.fastjson.JSONObject; import org.apache.http.HttpResponse; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpPost; import org.apache.http.entity.StringEntity; import org.apache.http.impl.client.HttpClients; import org.apache.http.util.EntityUtils; import java.io.IOException; import java.util.Set; /** * @公众号 : 全栈测试笔记 * @博客 : www.cnblogs.com/uncleyong * @微信 : ren168632201 * @描述 : <> */ public class Test { // 声明为静态方法,方便调用 public static String postRequest(String url, JSONObject jsonObject, JSONObject headers){ String res = ""; HttpPost httpPost = new HttpPost(url); // 通过形参设置请求头 Set<String> headerkeys = headers.keySet(); for (String headerkey : headerkeys) { httpPost.addHeader(headerkey.trim(),headers.getString(headerkey).trim()); } // 发送 json 类型数据 httpPost.setEntity(new StringEntity(jsonObject.toString(),"UTF-8")); HttpClient httpClient = HttpClients.createDefault(); // 发送请求 HttpResponse httpResponse = null; try { httpResponse = httpClient.execute(httpPost); System.out.println("状态码:" + httpResponse.getStatusLine().getStatusCode()); res = EntityUtils.toString(httpResponse.getEntity()); // res = EntityUtils.toString(httpResponse.getEntity(),"UTF-8"); } catch (IOException e) { e.printStackTrace(); } return res; } // 测试方法 public static void main(String[] args) { // post:json String url2 = "http://127.0.0.1:9999/login"; String parameters = "{\"username\":\"qzcsbj\",\"password\":\"123456\"}"; String headers = "{\"Content-Type\":\"application/json\"}"; JSONObject paramJsonObject = JSONObject.parseObject(parameters); JSONObject headersJsonObject = JSONObject.parseObject(headers); String res2 = postRequest(url2, paramJsonObject,headersJsonObject); System.out.println("获取到的结果为:" + res2); } }
原文会持续更新,原文地址:https://www.cnblogs.com/uncleyong/p/15867745.html
__EOF__
本文作者:持之以恒(韧)
关于博主:擅长性能、全链路、自动化、企业级自动化持续集成(DevTestOps)、测开等
面试必备:项目实战(性能、自动化)、简历笔试,https://www.cnblogs.com/uncleyong/p/15777706.html
测试提升:从测试小白到高级测试修炼之路,https://www.cnblogs.com/uncleyong/p/10530261.html
欢迎分享:如果您觉得文章对您有帮助,欢迎转载、分享,也可以点击文章右下角【推荐】一下!
关于博主:擅长性能、全链路、自动化、企业级自动化持续集成(DevTestOps)、测开等
面试必备:项目实战(性能、自动化)、简历笔试,https://www.cnblogs.com/uncleyong/p/15777706.html
测试提升:从测试小白到高级测试修炼之路,https://www.cnblogs.com/uncleyong/p/10530261.html
欢迎分享:如果您觉得文章对您有帮助,欢迎转载、分享,也可以点击文章右下角【推荐】一下!