SpringBoot之@Value与@ConfigurationProperties注解

柔情只为你懂 2022-03-25 06:51 288阅读 0赞

### 1.@Value ###

1.[本来想自己总结一下，查了一下发现这位同志写的真好，直接给链接吧 (点击跳转) ?][Link 1]

### 2.spring.profiles.active ###

1.[有关于active 的，那篇文章有作解释，在此我再补充一下（点击跳转）?][active]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjYzMzEzMQ_size_16_color_FFFFFF_t_70]

### 还有一个注解 同样有获取配置的作用 @ConfigurationProperties ###

#### 1.application.yml 文件 ####

server:
      port: 9098
    
    spring:
      application:
        name: order-service
      datasource:
        url: jdbc:mysql://127.0.0.1:3306/shop?useUnicode=true&characterEncoding=utf8&autoReconnect=true&allowMultiQueries=true
        username: root
        password: 123456
        driver-class-name: com.mysql.jdbc.Driver
        druid:
          initial-size: 5
          min-idle: 5
          max-active: 20
          max-wait: 1000
          test-on-borrow: true
      redis:
        host: 127.0.0.1
    eureka:
      client:
        service-url:
          defaultZone: http://127.0.0.1:10086/eureka
      instance:
        prefer-ip-address: true
        ip-address: 127.0.0.1
        instance-id: ${ eureka.instance.ip-address}.${ server.port}
        lease-renewal-interval-in-seconds: 3
        lease-expiration-duration-in-seconds: 10
    sc:
      jwt:
        pubKeyPath: D:/rsa/rsa.pub # 公钥地址

#### 2.JavaBean中使用 ####

@Configuration //声明为配置类 让其可以扫描到
    @Data  //lombok
    @ConfigurationProperties(prefix = "sc.jwt")  //映射application.yml
    public class JwtProperties { 
    
        private String pubKeyPath;// 公钥
    
        private PublicKey publicKey; // 公钥
    
    
        @PostConstruct
        public void init(){ 
            try { 
                // 获取公钥和私钥
                this.publicKey = RsaUtils.getPublicKey(pubKeyPath);
            } catch (Exception e) { 
                System.out.println("初始化公钥失败！");
                throw new RuntimeException();
            }
        }
    
    }

#### 3.图解 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjYzMzEzMQ_size_16_color_FFFFFF_t_70 1]

[Link 1]: https://blog.csdn.net/hunan961/article/details/79206291
[active]: https://blog.csdn.net/weixin_42633131/article/details/86371613
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjYzMzEzMQ_size_16_color_FFFFFF_t_70 1]: /images/20220325/11d805f0027d4782afcdb3a084461e70.png