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發布時間：2023/12/3 编程问答 29 豆豆

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前端對此接口進行請求

package com.chuang.bootplus.controller.wx;import com.alibaba.fastjson.JSONObject; import com.chuang.bootplus.entity.UserInfo; import com.chuang.bootplus.service.UserInfoService; import com.chuang.bootplus.utils.HttpClientUtil; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.*; import java.text.ParseException; import java.util.HashMap; import java.util.List; import java.util.Map;@RestController @CrossOrigin @RequestMapping("/wx") public class WxLogin2 {@AutowiredUserInfoService userInfoService;//小程序端登錄接收code@PostMapping("/login")@CrossOriginpublic Map<String, String> login(@RequestParam("code") String code,@RequestParam("CName") String CName,@RequestParam("Cimgurl") String url) {// 配置請求參數Map<String, String> param = new HashMap<>();param.put("appid", "");param.put("secret", "");param.put("js_code", code);param.put("grant_type","authorization_code" );// 發送請求String wxResult = HttpClientUtil.doGet("https://api.weixin.qq.com/sns/jscode2session", param);JSONObject jsonObject = JSONObject.parseObject(wxResult);// 獲取參數返回的System.out.println(wxResult);String session_key = jsonObject.get("session_key").toString();System.out.println(session_key);String open_id = jsonObject.get("openid").toString();System.out.println(open_id);// 根據返回的實體類，判斷用戶是否是新用戶，是的話，將用戶信息存到數據庫UserInfo userInfo = new UserInfo();UserInfo byId = userInfoService.getById(open_id);if (byId != null) {Map<String, String> result = new HashMap<>();result.put("Cname", byId.getNickname());result.put("CImgUrl", byId.getAvatar()); // result.put("CNum",byId);result.put("session_key", session_key);result.put("open_id", open_id);return result;} else {userInfo.setNickname(CName);userInfo.setAvatar(url);userInfo.setSession_key(session_key);userInfo.setOpenid(open_id);// 添加到數據庫Boolean flag = userInfoService.save(userInfo);}// 封裝返回小程序Map<String, String> result = new HashMap<>();result.put("session_key", session_key);result.put("open_id", open_id);return result;}}

后端返回

session_key

openid

需要用到的util類

package com.chuang.bootplus.utils;import org.apache.http.client.methods.CloseableHttpResponse; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.utils.URIBuilder; 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.net.URI; import java.util.Map;public class HttpClientUtil {public static String doGet(String url, Map<String, String> param) {// 創建Httpclient對象CloseableHttpClient httpclient = HttpClients.createDefault();String resultString = "";CloseableHttpResponse response = null;try {// 創建uriURIBuilder builder = new URIBuilder(url);if (param != null) {for (String key : param.keySet()) {builder.addParameter(key, param.get(key));}}URI uri = builder.build();// 創建http GET請求HttpGet httpGet = new HttpGet(uri);// 執行請求response = httpclient.execute(httpGet);// 判斷返回狀態是否為200if (response.getStatusLine().getStatusCode() == 200) {resultString = EntityUtils.toString(response.getEntity(), "UTF-8");}} catch (Exception e) {e.printStackTrace();} finally {try {if (response != null) {response.close();}httpclient.close();} catch (IOException e) {e.printStackTrace();}}return resultString;}public static String doGet(String url) {return doGet(url, null);} }

全部的依賴

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.4.5</version><relativePath/> </parent><groupId>com.shengxian</groupId><artifactId>shop</artifactId><version>0.0.1-SNAPSHOT</version><name>shop</name><description>Demo project for Spring Boot</description><properties><java.version>1.8</java.version></properties>                                                                                                                                          <dependencies><dependency><groupId>net.coobird</groupId><artifactId>thumbnailator</artifactId><version>0.4.8</version></dependency><dependency><groupId>org.springframework.session</groupId><artifactId>spring-session-jdbc</artifactId></dependency><dependency><groupId>redis.clients</groupId><artifactId>jedis</artifactId><version>2.1.0</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-thymeleaf</artifactId></dependency>      <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><scope>runtime</scope></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-boot-starter</artifactId><version>3.0.5</version></dependency><dependency><groupId>io.swagger</groupId><artifactId>swagger-annotations</artifactId><version>1.5.22</version></dependency>          <dependency><groupId>org.aspectj</groupId><artifactId>aspectjweaver</artifactId><version>1.8.13</version></dependency><dependency><groupId>org.apache.commons</groupId><artifactId>commons-pool2</artifactId></dependency>    <dependency><groupId>commons-httpclient</groupId><artifactId>commons-httpclient</artifactId><version>3.0.1</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-devtools</artifactId></dependency><dependency><groupId>org.apache.commons</groupId><artifactId>commons-io</artifactId><version>1.3.2</version></dependency><dependency><groupId>org.apache.commons</groupId><artifactId>commons-lang3</artifactId><version>3.4</version></dependency><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpclient</artifactId><version>4.3.2</version></dependency><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpclient</artifactId><version>4.5.5</version></dependency><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpmime</artifactId><version>4.5</version></dependency><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.38</version></dependency><dependency><groupId>com.auth0</groupId><artifactId>java-jwt</artifactId><version>3.4.1</version></dependency><dependency><groupId>com.github.binarywang</groupId><artifactId>weixin-java-miniapp</artifactId><version>3.3.0</version></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><configuration><excludes><exclude><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId></exclude></excludes></configuration></plugin></plugins></build> </project>

總結

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