SpringBoot属性绑定与bean属性校验实现方法详解

public class ServiceConfig {
    private int prot;
    private String ipAddress;
    private long timeOut;

@Component
@Data
@ConfigurationProperties(prefix = "servers")
public class ServiceConfig {
    private int prot;
    private String ipAddress;
    private long timeOut;

@SpringBootApplication
public class SpringBootDemo2Application {
    public static void main(String[] args) {
        ConfigurableApplicationContext context = SpringApplication.run(SpringBootDemo2Application.class, args);
//获取自定义类
        ServiceConfig bean = context.getBean(ServiceConfig.class);
//打印获取的bean，查看是否成功绑定属性
        System.out.println(bean);
    }
}

@Bean
@ConfigurationProperties(prefix = "datasource")
public DruidDataSource dataSource(){
    DruidDataSource druid = new DruidDataSource();
    return druid;
}

@SpringBootApplication
public class SpringBootDemo2Application {
    @Bean
    @ConfigurationProperties(prefix = "datasource")
    public DruidDataSource dataSource(){
        DruidDataSource druid = new DruidDataSource();
        return druid;
    }
    public static void main(String[] args) {
        ConfigurableApplicationContext context = SpringApplication.run(SpringBootDemo2Application.class, args);
        DruidDataSource bean = context.getBean(DruidDataSource.class);
        System.out.println(bean.getUsername());
        System.out.println(bean.getPassword());
        System.out.println(bean.getUrl());
        System.out.println(bean.getDriverClassName());
    }
}

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

@Data
@ConfigurationProperties(prefix = "servers")
@Validated
public class ServiceConfig {
}

@Data
@ConfigurationProperties(prefix = "servers")
@Validated
public class ServiceConfig {
    @Max(value = 8888,message = "最大值能超过8888")
    @Min(value = 200,message = "最小值不可小于200")
    private int prot;
    private String ipAddress;
    private long timeOut;
}