Spring Boot 常用配置

基础配置

application.yml

server:
  port: 8080
  servlet:
    context-path: /api

spring:
  application:
    name: my-application
  profiles:
    active: dev

数据源配置

MySQL

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/mydb?useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai
    username: root
    password: password
    hikari:
      minimum-idle: 5
      maximum-pool-size: 20
      idle-timeout: 30000
      max-lifetime: 1800000
      connection-timeout: 30000

Redis

spring:
  data:
    redis:
      host: localhost
      port: 6379
      password:
      database: 0
      timeout: 3000ms
      lettuce:
        pool:
          max-active: 8
          max-idle: 8
          min-idle: 0

MyBatis-Plus 配置

mybatis-plus:
  mapper-locations: classpath*:/mapper/**/*.xml
  type-aliases-package: com.example.entity
  configuration:
    map-underscore-to-camel-case: true
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
  global-config:
    db-config:
      id-type: auto
      logic-delete-field: deleted
      logic-delete-value: 1
      logic-not-delete-value: 0

日志配置

logging:
  level:
    root: info
    com.example: debug
  file:
    name: logs/application.log
  pattern:
    console: "%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} - %msg%n"

常用注解

@RestController
@RequestMapping("/api/users")
public class UserController {

    @Autowired
    private UserService userService;

    @GetMapping("/{id}")
    public Result<User> getById(@PathVariable Long id) {
        return Result.success(userService.getById(id));
    }

    @PostMapping
    public Result<Void> save(@RequestBody @Valid UserDTO dto) {
        userService.save(dto);
        return Result.success();
    }
}

全局异常处理

@RestControllerAdvice
public class GlobalExceptionHandler {

    @ExceptionHandler(BusinessException.class)
    public Result<Void> handleBusinessException(BusinessException e) {
        return Result.fail(e.getCode(), e.getMessage());
    }

    @ExceptionHandler(MethodArgumentNotValidException.class)
    public Result<Void> handleValidationException(MethodArgumentNotValidException e) {
        String message = e.getBindingResult().getFieldErrors().stream()
            .map(FieldError::getDefaultMessage)
            .collect(Collectors.joining(", "));
        return Result.fail(400, message);
    }
}