微信网站案例,无极网络平台,悬浮网站底部代码,wordpress 文章页模板HttpClientr入门
介绍
HttpClient是Apache Jakarta Common下的子项目#xff0c;可以用来提供高效的#xff0c;最新的、功能丰富的支持HTTP协议的客户端编程工具包#xff0c;并且它支持HTTP协议的版本和建议。
依赖导入
dependencygroupIdorg.apache.…HttpClientr入门
介绍
HttpClient是Apache Jakarta Common下的子项目可以用来提供高效的最新的、功能丰富的支持HTTP协议的客户端编程工具包并且它支持HTTP协议的版本和建议。
依赖导入
dependencygroupIdorg.apache.httpcomponents/groupIdartifactIdhttpclient/artifactIdversion4.5.13/version
/dependency核心API
HttpClientHttpClientsCloseableHttpClientHttpGetHttpPost
发送请求步骤
创建HttpClient对象创建Http请求对象调用HttpClient的execute方法发送请求
import com.alibaba.fastjson.JSONObject;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
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.HttpClients;
import org.apache.http.util.EntityUtils;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;SpringBootTest
Slf4j
public class HttpClientTest {Testpublic void HttpGET() throws Exception {//1.创建请求HttpClient对象CloseableHttpClient httpClient HttpClients.createDefault();//2.创建Http请求对象HttpGet httpGet new HttpGet(http://localhost:8080/user/shop/status);//3.调用HttpClient的execute方法发送请求CloseableHttpResponse response httpClient.execute(httpGet);//获取数据//获取响应的状态码int code response.getStatusLine().getStatusCode();System.out.println(返回的状态码是:code);//获取响应的数据HttpEntity entity response.getEntity();String body EntityUtils.toString(entity);System.out.println(服务器返回的数据为body);//关闭请求httpClient.close();response.close();}Testpublic void HttpPost() throws Exception{//创建HttpClient对象CloseableHttpClient httpClient HttpClients.createDefault();//创建Http请求对象HttpPost post new HttpPost(http://localhost:8080/admin/employee/login);//构建请求的参数JSONObject jsonObject new JSONObject();jsonObject.put(username,admin);jsonObject.put(password,123456);StringEntity stringEntity new StringEntity(jsonObject.toString());//指定编码格式stringEntity.setContentEncoding(utf-8);//数据格式stringEntity.setContentType(application/json);post.setEntity(stringEntity);//发送请求CloseableHttpResponse response httpClient.execute(post);//获取响应回来的参数int statusCode response.getStatusLine().getStatusCode();System.out.println(状态码statusCode);HttpEntity entity response.getEntity();String body EntityUtils.toString(entity);System.out.println(post请求响应回来的参数body);//关闭服务httpClient.close();post.clone();}
}HttpClientUtil 工具类使用的时候直接调用
import com.alibaba.fastjson.JSONObject;
import org.apache.http.NameValuePair;
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.client.methods.HttpPost;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.entity.StringEntity;
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.net.URI;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;/*** Http工具类*/
public class HttpClientUtil {static final int TIMEOUT_MSEC 5 * 1000;/*** 发送GET方式请求* param url* param paramMap* return*/public static String doGet(String url,MapString,String paramMap){// 创建Httpclient对象CloseableHttpClient httpClient HttpClients.createDefault();String result ;CloseableHttpResponse response null;try{URIBuilder builder new URIBuilder(url);if(paramMap ! null){for (String key : paramMap.keySet()) {builder.addParameter(key,paramMap.get(key));}}URI uri builder.build();//创建GET请求HttpGet httpGet new HttpGet(uri);//发送请求response httpClient.execute(httpGet);//判断响应状态if(response.getStatusLine().getStatusCode() 200){result EntityUtils.toString(response.getEntity(),UTF-8);}}catch (Exception e){e.printStackTrace();}finally {try {response.close();httpClient.close();} catch (IOException e) {e.printStackTrace();}}return result;}/*** 发送POST方式请求* param url* param paramMap* return* throws IOException*/public static String doPost(String url, MapString, String paramMap) throws IOException {// 创建Httpclient对象CloseableHttpClient httpClient HttpClients.createDefault();CloseableHttpResponse response null;String resultString ;try {// 创建Http Post请求HttpPost httpPost new HttpPost(url);// 创建参数列表if (paramMap ! null) {ListNameValuePair paramList new ArrayList();for (Map.EntryString, String param : paramMap.entrySet()) {paramList.add(new BasicNameValuePair(param.getKey(), param.getValue()));}// 模拟表单UrlEncodedFormEntity entity new UrlEncodedFormEntity(paramList);httpPost.setEntity(entity);}httpPost.setConfig(builderRequestConfig());// 执行http请求response httpClient.execute(httpPost);resultString EntityUtils.toString(response.getEntity(), UTF-8);} catch (Exception e) {throw e;} finally {try {response.close();} catch (IOException e) {e.printStackTrace();}}return resultString;}/*** 发送POST方式请求* param url* param paramMap* return* throws IOException*/public static String doPost4Json(String url, MapString, String paramMap) throws IOException {// 创建Httpclient对象CloseableHttpClient httpClient HttpClients.createDefault();CloseableHttpResponse response null;String resultString ;try {// 创建Http Post请求HttpPost httpPost new HttpPost(url);if (paramMap ! null) {//构造json格式数据JSONObject jsonObject new JSONObject();for (Map.EntryString, String param : paramMap.entrySet()) {jsonObject.put(param.getKey(),param.getValue());}StringEntity entity new StringEntity(jsonObject.toString(),utf-8);//设置请求编码entity.setContentEncoding(utf-8);//设置数据类型entity.setContentType(application/json);httpPost.setEntity(entity);}httpPost.setConfig(builderRequestConfig());// 执行http请求response httpClient.execute(httpPost);resultString EntityUtils.toString(response.getEntity(), UTF-8);} catch (Exception e) {throw e;} finally {try {response.close();} catch (IOException e) {e.printStackTrace();}}return resultString;}private static RequestConfig builderRequestConfig() {return RequestConfig.custom().setConnectTimeout(TIMEOUT_MSEC).setConnectionRequestTimeout(TIMEOUT_MSEC).setSocketTimeout(TIMEOUT_MSEC).build();}}
