关于SpringBoot的@ConfigurationProperties注解和松散绑定、数据校验

@Data   //使用该注解需要导入Lombok依赖
@Component
@ConfigurationProperties(prefix = "userinfo")
public class UserInfo {
    private String userId;
    private String name;
}

userInfo:
  userId: 1001
  name: lucy

@RestController
public class HelloController {
    @Autowired
    private UserInfo userInfo;
    @GetMapping("/user")
    public UserInfo getUserInfo(){
        return userInfo;
    }
}

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid-spring-boot-starter</artifactId>
    <version>1.2.11</version>
</dependency>
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
</dependency>

spring:
  datasource:
    druid:
      driver-class-name: com.mysql.jdbc.Driver
      url: jdbc:mysql://localhost:3306/test?serverTimezone=UTC
      username: root
      password: root

@SpringBootConfiguration
public class DatasourceConfig {
    @Bean
    @ConfigurationProperties(prefix = "spring.database.druid")
    public DataSource database(){
        return new DruidDataSource();
    }
}

@RestController
public class HelloController {
    @Autowired
    private DataSource dataSource;
    @GetMapping("/datasource")
    public void getDataSource(){
        System.out.println(dataSource);
    }
}

userInfo:
  userId: 1001 # 驼峰命名方式
  #user_id: 1002 #下划线方式
  #user-id: 1003 #烤肉串方式
  #USER_ID: 1004 # 常量方式
  name: lucycd

<dependency>
    <groupId>javax.validation</groupId>
    <artifactId>validation-api</artifactId>
</dependency>
<dependency>
    <groupId>org.hibernate.validator</groupId>
    <artifactId>hibernate-validator</artifactId>
</dependency>

@Data
@Component
@ConfigurationProperties(prefix = "userinfo")
@Validated
public class UserInfo {
   @Max(value = 1000,message = "userid超出范围了！")
   @Min(value = 0,message = "userid不能小于0！")
   private String userId;
   @Size(min = 2,max = 5,message = "name长度应该在2-5之间")
   private String name;
}

userInfo:
  userId: 1001
  name: lucycd

@RestController
public class HelloController {
    @Autowired
    private UserInfo userInfo;
    @GetMapping("/user")
    public UserInfo getUserInfo(){
        return userInfo;
    }
}