升级微服务项目

user-service/src/main/java/cn/mayiming/App.java

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+package cn.mayiming;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * Hello world!
+ *
+ */
+@SpringBootApplication
+public class App 
+{
+    public static void main( String[] args )
+    {
+        SpringApplication.run(App.class, args);
+    }
+}

user-service/src/main/java/cn/mayiming/Controller/Redis/RedisParam.java

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+package cn.mayiming.Controller.Redis;
+
+public class RedisParam {
+    private String key;
+    private String value;
+
+    // 必须加无参构造器（JSON解析需要）
+    public RedisParam() {}
+
+    // GET/SET方法（必须加，否则JSON解析不到值）
+    public String getKey() {
+        return key;
+    }
+
+    public void setKey(String key) {
+        this.key = key;
+    }
+
+    public String getValue() {
+        return value;
+    }
+
+    public void setValue(String value) {
+        this.value = value;
+    }
+}

user-service/src/main/java/cn/mayiming/Controller/Redis/Redistest.java

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+package cn.mayiming.Controller.Redis;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.redis.core.StringRedisTemplate;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.concurrent.TimeUnit;
+
+@RestController
+public class Redistest {
+    @Autowired
+    private StringRedisTemplate stringRedisTemplate;
+    @PostMapping("/redis/put")
+    public String put(@RequestBody RedisParam param) {
+        String key = param.getKey();
+        stringRedisTemplate.opsForValue().set(key, "123", 10, TimeUnit.MINUTES);
+        String redisValue = stringRedisTemplate.opsForValue().get(key);
+        return "Redis写入成功！key=" + key + "，value=" + redisValue;
+    }
+}

user-service/src/main/java/cn/mayiming/Controller/UserCon/UserBody.java

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+package cn.mayiming.Controller.UserCon;
+
+public class UserBody {
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+
+    public String username;
+    public String password;
+}

user-service/src/main/java/cn/mayiming/Controller/UserCon/UserController.java

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+package cn.mayiming.Controller.UserCon;
+
+import cn.mayiming.Mapper.UserMapper;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.HashMap;
+import java.util.Map;
+
+@RestController
+public class UserController {
+
+    @Autowired
+    private UserMapper userMapper;
+
+    @PostMapping("/login")
+    public Map<String, Object>  login(@RequestBody UserBody user) {
+        Map<String, Object> result = new HashMap<>();
+        try {
+            String dbPassword = userMapper.getPasswordByUsername(user.getUsername());
+            String username = user.getUsername();
+            String password = user.getPassword();
+            // 3. 编写 SQL 查询数据库中的用户密码
+            // 用 ? 占位符，防止 SQL 注入（必须！）
+
+            // 4. 验证密码（实际项目要加密对比，这里简单演示）
+            if (password != null && password.equals(dbPassword)) {
+                result.put("code", 200);
+                result.put("msg", "登录成功");
+                result.put("data", username);
+            } else {
+                result.put("code", 400);
+                result.put("msg", "密码错误");
+            }
+        } catch (Exception e) {
+            // 捕获“用户不存在”等异常
+            result.put("code", 404);
+            result.put("msg", "用户名不存在或登录失败");
+            result.put("error", e.getMessage());
+        }
+        return result;
+    }
+}

user-service/src/main/java/cn/mayiming/Mapper/UserMapper.java

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+package cn.mayiming.Mapper;
+import cn.mayiming.Controller.UserCon.UserBody;
+import org.apache.ibatis.annotations.*;
+
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
+
+@Repository
+public interface UserMapper {
+    @Select("SELECT password FROM user WHERE username = #{username}")
+    String getPasswordByUsername(String username);
+    /**
+     * 根据ID查询用户（单条查询）
+     * @param id 用户ID
+     * @return 完整用户信息
+     */
+    @Select("SELECT id, username, password, nickname, create_time AS createTime FROM user WHERE id = #{id}")
+    UserBody getUserById(Long id);
+
+    /**
+     * 根据用户名查询完整用户信息（登录/校验用）
+     * @param username 用户名
+     * @return 完整用户信息
+     */
+    @Select("SELECT id, username, password, nickname, create_time AS createTime FROM user WHERE username = #{username}")
+    UserBody getUserByUsername(String username);
+
+    /**
+     * 查询所有用户（分页建议用 MyBatis-Plus，这里先实现全量）
+     * @return 用户列表
+     */
+    @Select("SELECT id, username, password, nickname, create_time AS createTime FROM user")
+    List<UserBody> listAllUsers();
+
+    // ==================== 增 ====================
+    /**
+     * 新增用户（自增ID）
+     * @param user 用户实体
+     * @return 影响行数（1=成功，0=失败）
+     */
+    @Insert("INSERT INTO user (username, password, nickname, create_time) VALUES (#{username}, #{password}, #{nickname}, #{createTime})")
+    @Options(useGeneratedKeys = true, keyProperty = "id") // 自动返回自增的ID到user对象的id字段
+    int insertUser(UserBody user);
+
+    // ==================== 改 ====================
+    /**
+     * 根据ID修改用户昵称
+     * @param id 用户ID
+     * @param nickname 新昵称
+     * @return 影响行数
+     */
+    @Update("UPDATE user SET nickname = #{nickname} WHERE id = #{id}")
+    int updateNicknameById(@Param("id") Long id, @Param("nickname") String nickname);
+
+    /**
+     * 根据用户名修改密码
+     * @param username 用户名
+     * @param newPassword 新密码
+     * @return 影响行数
+     */
+    @Update("UPDATE user SET password = #{newPassword} WHERE username = #{username}")
+    int updatePasswordByUsername(@Param("username") String username, @Param("newPassword") String password);
+
+    // ==================== 删 ====================
+    /**
+     * 根据ID删除用户
+     * @param id 用户ID
+     * @return 影响行数
+     */
+    @Delete("DELETE FROM user WHERE id = #{id}")
+    int deleteUserById(Long id);
+
+    /**
+     * 根据用户名删除用户
+     * @param username 用户名
+     * @return 影响行数
+     */
+    @Delete("DELETE FROM user WHERE username = #{username}")
+    int deleteUserByUsername(String username);
+}

user-service/src/main/resources/application.yml

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+server:
+  port: 9091
+spring:
+  data:
+    redis:
+      port: 6379
+      password: ""
+      database: 0
+      timeout: 10000
+  datasource:
+    # 连接 URL（关键：test_db 是你要连接的数据库名，需提前创建）
+    url: jdbc:mysql://rm-f8z6oc5a03331500p8o.mysql.rds.aliyuncs.com:3306/test?useUnicode=true&characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&allowPublicKeyRetrieval=true
+    # 数据库用户名
+    username: root
+    # 数据库密码（替换为你的 MySQL 密码）
+    password: Root123456
+    # 驱动类名（MySQL 8.x 用这个，5.x 改为 com.mysql.jdbc.Driver）
+    driver-class-name: com.mysql.cj.jdbc.Driver
+    # 连接池配置（可选，提升性能）
+    hikari:
+      maximum-pool-size: 10  # 最大连接数
+      minimum-idle: 2        # 最小空闲连接数
+      idle-timeout: 60000    # 空闲连接超时时间（毫秒）
+      connection-timeout: 30000 # 连接超时时间（毫秒）