SpringBoot常用计量与bean属性校验和进制数据转换规则全面分析【java入门】

目录

• 常用计量单位
• bean属性校验
• 进制数据转换规则
• yaml字面值表达式方式

@Data  //lombok省去get/set/toString
@ConfigurationProperties(prefix = "servers") //配置文件的位置，对应的属性注入
public class ServerConfig {
    private String ipAddress;
    private int port;
    private String detail;
//时间
    private Duration serverTimeOut;
//存储空间
    private DataSize dataSize;
}

        
            javax.validation
            validation-api
        

        
            org.hibernate.validator
            hibernate-validator
        

@Data  //lombok省去get/set/toString
//@Component //交给spring容器管理
@ConfigurationProperties(prefix = "servers") //配置文件的位置，对应的属性注入
//②开启校验
@Validated
public class ServerConfig {
    private String ipAddress;
//    ③设置校验规则
@Max(value=9000,message = "最大不能超过9000")
@Min(value=100,message = "最大不能低于100")
    private int port;
    private String detail;
    private Duration serverTimeOut;
    private DataSize dataSize;
}

package com;
import com.pojo.ServerConfig;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
@SpringBootTest
class Springboot11ConfigurationApplicationTests {
    @Value("${mysql.Password1}")
    private String password1;
    @Value("${mysql.Password2}")
    private String password2;
    @Value("${mysql.Password3}")
    private String password3;
    @Value("${mysql.Password4}")
    private String password4;
    @Test
    void contextLoads() {
        System.out.println(password1);
        System.out.println(password2);
        System.out.println(password3);
        System.out.println(password4);
    }
}