[后端] 添加OpenFeign RPC框架；添加access微服务项目；添加进出码接口；添加postman-collection JSON

backend/microservice-provider-access-8002/src/main/java/com/cxyxiaomo/epp/access/AccessProvider.java

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+package com.cxyxiaomo.epp.access;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
+import org.springframework.cloud.openfeign.EnableFeignClients;
+
+// 启动类
+
+@SpringBootApplication
+@EnableDiscoveryClient
+@EnableFeignClients
+public class AccessProvider {
+    public static void main(String[] args) {
+        SpringApplication.run(AccessProvider.class, args);
+    }
+}

backend/microservice-provider-access-8002/src/main/java/com/cxyxiaomo/epp/access/controller/CodeController.java

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+package com.cxyxiaomo.epp.access.controller;
+
+import com.cxyxiaomo.epp.common.pojo.User;
+import com.cxyxiaomo.epp.common.response.Res;
+import com.cxyxiaomo.epp.access.rpc.UserServiceFeign;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+import java.util.HashMap;
+import java.util.Map;
+
+@Controller
+@RequestMapping("/access")
+public class CodeController {
+
+    @Autowired
+    private UserServiceFeign userService;
+
+    @PostMapping("/getCodeInfo")
+    @ResponseBody
+    public Res getCodeInfo(@RequestParam("id") Integer id) {
+        User user = userService.getUserById(id);
+        if (user == null) {
+            return Res.error("用户不存在");
+        }
+
+        // TODO 判断用户的健康状态（昨日是否体温打卡，管理员是否禁止该用户进出，用户所属楼栋是否允许出入等）
+
+        Map<String, Object> map = new HashMap<>();
+        map.put("id", id);
+        map.put("qrcodeColor", "green");
+        map.put("infoText", "绿码 请通行");
+        map.put("infoTextColor", "green");
+        map.put("extra", user);
+        return Res.success(map);
+    }
+}

backend/microservice-provider-access-8002/src/main/java/com/cxyxiaomo/epp/access/dao/AccessDao.java

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+package com.cxyxiaomo.epp.access.dao;
+
+import org.apache.ibatis.annotations.Mapper;
+import org.springframework.stereotype.Repository;
+
+@Mapper
+@Repository
+public interface AccessDao {
+
+}

backend/microservice-provider-access-8002/src/main/java/com/cxyxiaomo/epp/access/rpc/UserServiceFeign.java

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+package com.cxyxiaomo.epp.access.rpc;
+
+import com.cxyxiaomo.epp.common.pojo.User;
+import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+
+@FeignClient("microservice-provider-user")
+public interface UserServiceFeign {
+    /**
+     * 返回值、参数要对应，方法名随意
+     * 在 OpenFeign 中方法参数前如果没有注解，默认添加 @RequestBody 注解，最多只能存在一个不带注解的参数
+     * 普通表单参数必须添加 @Requestparam 注解。如果变量名和参数名称对应可以不写name
+     */
+    @PostMapping("/user/rpc/getUserById")
+    User getUserById(@RequestParam("id") Integer id);
+}

backend/microservice-provider-access-8002/src/main/java/com/cxyxiaomo/epp/access/service/AccessService.java

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+package com.cxyxiaomo.epp.access.service;
+
+import com.cxyxiaomo.epp.common.pojo.User;
+
+public interface AccessService {
+
+}

backend/microservice-provider-access-8002/src/main/java/com/cxyxiaomo/epp/access/service/AccessServiceImpl.java

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+package com.cxyxiaomo.epp.access.service;
+
+import com.cxyxiaomo.epp.common.pojo.User;
+import com.cxyxiaomo.epp.access.dao.AccessDao;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class AccessServiceImpl implements AccessService {
+
+    @Autowired
+    private AccessDao accessDao;
+
+}

backend/microservice-provider-access-8002/src/main/resources/application-remote.yml

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+spring:
+  datasource:
+    url: jdbc:mysql://39.99.244.156:3306/epp?useUnicode=true&characterEncoding=utf8&useSSL=false
+    username: root
+    password: root

backend/microservice-provider-access-8002/src/main/resources/application.yml

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+server:
+  port: 8002
+
+# Mybatis 配置
+mybatis:
+  type-aliases-package: com.cxyxiaomo.epp.pojo
+  config-location: classpath:mybatis/mybatis-config.xml
+  mapper-locations: classpath:mybatis/mapper/*.xml
+
+# Spring 配置
+spring:
+  application:
+    name: microservice-provider-access
+  cloud:
+    nacos:
+      discovery:
+        server-addr: 127.0.0.1:8848
+  datasource:
+    type: com.alibaba.druid.pool.DruidDataSource
+    driver-class-name: com.mysql.cj.jdbc.Driver
+    url: jdbc:mysql://127.0.0.1:3306/epp?useUnicode=true&characterEncoding=utf8&useSSL=false
+    username: root
+    password: root

backend/microservice-provider-access-8002/src/main/resources/mybatis/mapper/AccessDao.xml

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+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.cxyxiaomo.epp.access.dao.AccessDao">
+
+</mapper>

backend/microservice-provider-access-8002/src/main/resources/mybatis/mybatis-config.xml

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+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE configuration
+        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-config.dtd">
+<configuration>
+    <settings>
+        <!--开启二级缓存-->
+        <setting name="cacheEnabled" value="true"/>
+    </settings>
+</configuration>