maven依赖

<dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.5.6</version> </dependency> <!-- https://mvnrepository.com/artifact/com.alibaba/fastjson --> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.47</version> </dependency>

工具类

package com.yyjdemo.shardingjdbc.http;import com.alibaba.fastjson.JSONObject;import org.apache.http.HttpEntity;import org.apache.http.NameValuePair;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.params.HttpParams;import org.apache.http.protocol.HTTP;import org.apache.http.util.EntityUtils;import java.io.IOException;import java.util.ArrayList;import java.util.List;public class HttpUtils { public static void main(String[] args) throws IOException { JSONObject jsonObject = new JSONObject(); jsonObject.put("id","1");// String httppost = httppost("http://127.0.0.1:8080/jdbc/testpost",jsonObject);// System.out.println(httppost);// String httppost = httppostjson("http://127.0.0.1:8080/jdbc/testpostjson",jsonObject); String httppost = httpget("http://127.0.0.1:8080/jdbc/test",jsonObject); } public static String httpget(String url, JSONObject jsonObject) { try { URIBuilder uriBuilder = new URIBuilder(url); if(!jsonObject.isEmpty()){ jsonObject.forEach((k,v)->{ uriBuilder.addParameter(k,v.toString()); }); } HttpGet httpget = new HttpGet(uriBuilder.toString()); try(CloseableHttpClient httpclient = HttpClients.createDefault(); CloseableHttpResponse execute = httpclient.execute(httpget);){ HttpEntity entity = execute.getEntity(); String s = EntityUtils.toString(entity); return s; } }catch (Exception e){ e.printStackTrace(); } return null; } public static String httppostjson(String url, JSONObject jsonObject) { try { HttpPost httpPost = new HttpPost(url); httpPost.addHeader(HTTP.CONTENT_TYPE,"application/json"); StringEntity stringEntity = new StringEntity(jsonObject.toString(),"utf-8"); httpPost.setEntity(stringEntity); try(CloseableHttpClient httpclient = HttpClients.createDefault(); CloseableHttpResponse execute = httpclient.execute(httpPost);){ HttpEntity entity = execute.getEntity(); String s = EntityUtils.toString(entity); return s; } }catch (Exception e){ e.printStackTrace(); } return null; } private static String httppost(String url,JSONObject jsonObject){ try { HttpPost httpPost = new HttpPost(url); List<NameValuePair> objects = new ArrayList<>(); jsonObject.forEach((k,v)->{ BasicNameValuePair basicNameValuePair = new BasicNameValuePair(k, v.toString()); objects.add(basicNameValuePair); }); StringEntity stringEntity = new UrlEncodedFormEntity(objects,"utf-8"); httpPost.setEntity(stringEntity); try(CloseableHttpClient httpclient = HttpClients.createDefault(); CloseableHttpResponse execute = httpclient.execute(httpPost);){ HttpEntity entity = execute.getEntity(); String s = EntityUtils.toString(entity); return s; } }catch (Exception e){ e.printStackTrace(); } return null; }}