标题

包含get和post的有参和无参的请求
post有参请求用httpEntity接受，处理成JsonObject类型

方法

package com.shzu.xyf.finding_sql_install_system.finding_sql_install_system.common;import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import org.apache.http.*;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.*;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;public class HttpClientUtils {//    无参数的Get请求public static HttpEntity getWithoutParams(String url) {CloseableHttpClient httpClient = HttpClientBuilder.create().build();// 创建Get请求HttpGet httpGet = new HttpGet(url);// 响应模型CloseableHttpResponse response = null;try {// 由客户端执行(发送)Get请求response = httpClient.execute(httpGet);// 从响应模型中获取响应实体HttpEntity responseEntity = response.getEntity();System.out.println("响应状态为:" + response.getStatusLine());if (responseEntity != null) {System.out.println("响应内容长度为:" + responseEntity.getContentLength());System.out.println("响应内容为:" + EntityUtils.toString(responseEntity));return responseEntity;}} catch (ClientProtocolException e) {e.printStackTrace();} catch (ParseException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} finally {try {// 释放资源if (httpClient != null) {httpClient.close();}if (response != null) {response.close();}} catch (IOException e) {e.printStackTrace();}}return null;}//    带参数的Get请求public static HttpEntity getWithParams(String url, Map<String, String> paramMap) {// 获得Http客户端(可以理解为:你得先有一个浏览器;注意:实际上HttpClient与浏览器是不一样的)CloseableHttpClient httpClient = HttpClientBuilder.create().build();// 参数StringBuffer params = new StringBuffer();try {// 字符数据最好encoding以下;这样一来，某些特殊字符才能传过去(如:某人的名字就是“&”,不encoding的话,传不过去)for (Map.Entry<String, String> paramsEntry : paramMap.entrySet()) {params.append(paramsEntry.getKey() + "=" + URLEncoder.encode(paramsEntry.getValue(), "utf-8"));params.append("&");}params.deleteCharAt(params.length() - 1);} catch (UnsupportedEncodingException e1) {e1.printStackTrace();}// 创建Get请求HttpGet httpGet = new HttpGet(url + "?" + params);// 响应模型CloseableHttpResponse response = null;try {// 配置信息RequestConfig requestConfig = RequestConfig.custom()// 设置连接超时时间(单位毫秒).setConnectTimeout(5000)// 设置请求超时时间(单位毫秒).setConnectionRequestTimeout(5000)// socket读写超时时间(单位毫秒).setSocketTimeout(5000)// 设置是否允许重定向(默认为true).setRedirectsEnabled(true).build();// 将上面的配置信息 运用到这个Get请求里httpGet.setConfig(requestConfig);// 由客户端执行(发送)Get请求response = httpClient.execute(httpGet);// 从响应模型中获取响应实体HttpEntity responseEntity = response.getEntity();System.out.println("响应状态为:" + response.getStatusLine());if (responseEntity != null) {System.out.println("响应内容长度为:" + responseEntity.getContentLength());System.out.println("响应内容为:" + EntityUtils.toString(responseEntity));return responseEntity;}} catch (ClientProtocolException e) {e.printStackTrace();} catch (ParseException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} finally {try {// 释放资源if (httpClient != null) {httpClient.close();}if (response != null) {response.close();}} catch (IOException e) {e.printStackTrace();}}return null;}//    不带参数的post请求public static HttpEntity postWithoutParam(String url){// 获得Http客户端(可以理解为:你得先有一个浏览器;注意:实际上HttpClient与浏览器是不一样的)CloseableHttpClient httpClient = HttpClientBuilder.create().build();// 创建Post请求HttpPost httpPost = new HttpPost(url);// 响应模型CloseableHttpResponse response = null;try {// 由客户端执行(发送)Post请求response = httpClient.execute(httpPost);// 从响应模型中获取响应实体HttpEntity responseEntity = response.getEntity();System.out.println("响应状态为:" + response.getStatusLine());if (responseEntity != null) {System.out.println("响应内容长度为:" + responseEntity.getContentLength());System.out.println("响应内容为:" + EntityUtils.toString(responseEntity));return responseEntity;}} catch (ClientProtocolException e) {e.printStackTrace();} catch (ParseException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} finally {try {// 释放资源if (httpClient != null) {httpClient.close();}if (response != null) {response.close();}} catch (IOException e) {e.printStackTrace();}}return null;}

    //    带参数的Post请求public static String getStrToPostWithParams(String url,JSONObject params) throws URISyntaxException {// 获得Http客户端(可以理解为:你得先有一个浏览器;注意:实际上HttpClient与浏览器是不一样的)CloseableHttpClient httpClient = HttpClientBuilder.create().build();// 创建Post请求// 参数URI uri = new URI(url);HttpPost httpPost = new HttpPost(uri);// 将user对象转换为json字符串，并放入entity中StringEntity entity = new StringEntity(JSON.toJSONString(params), "UTF-8");// post请求是将参数放在请求体里面传过去的;这里将entity放入post请求体中httpPost.setEntity(entity);httpPost.setHeader("Content-Type", "application/json;charset=utf8");// 响应模型CloseableHttpResponse response = null;try {// 由客户端执行(发送)Post请求response = httpClient.execute(httpPost);// 从响应模型中获取响应实体byte[] bytes = EntityUtils.toByteArray(response.getEntity());System.out.println("响应状态为:" + response.getStatusLine());if (bytes != null) {String resultStr = new String(bytes,"UTF-8");JSONObject jsonObject = JSONObject.parseObject(resultStr);return jsonObject.toJSONString();}} catch (ClientProtocolException e) {e.printStackTrace();} catch (ParseException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} finally {try {// 释放资源if (httpClient != null) {httpClient.close();}if (response != null) {response.close();}} catch (IOException e) {e.printStackTrace();}}return null;}}

Demo

public class demo {public static void main(String[] args) throws JSONException, URISyntaxException, IOException {String url = "http://localhost:8000/post";JSONObject params = new JSONObject();params.put("eee","eee");
//        HttpEntity httpEntity = HttpClientUtils.postWithParams(url, params);String strToPostWithParams = HttpClientUtils.getStrToPostWithParams(url, params);JSONObject jsonObject = JSONObject.parseObject(strToPostWithParams);System.out.println(jsonObject.get("code"));}
}

测试接口

    @PostMapping("/post")@ResponseBodypublic JSONObject test(@RequestBody JSONObject data){System.out.println(data);JSONObject result = new JSONObject();result.put("code",1);return result;}

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httpClient请求接口，用httpEntity接受结果

标题

方法

Demo

测试接口

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