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Spring Annotation @ConditionalOnProperty spring doc解释 @Conditional: Indicates that a component is only eligible for registration when all specified conditions match.(ways: type-level, meta-annotation, method-level) @ConditionalOnProperty: Conditional…
配置Spring Boot通过@ConditionalOnProperty来控制Configuration是否生效 1.matchIfMissing属性:从application.properties中读取某个属性值,如果该值为空,默认值为true @Configuration @ConditionalOnClass({ Feign.class }) @ConditionalOnProperty(value = "feign.oauth2.enabled", matchIfMissin…
@Retention(RetentionPolicy.RUNTIME) @Target({ElementType.TYPE, ElementType.METHOD}) @Documented @Conditional({OnPropertyCondition.class}) public @interface ConditionalOnProperty { String[] value() default {}; //数组,获取对应property名称的值,与name不可同时使用 String…
Spring boot中有个注解@ConditionalOnProperty,这个注解能够控制某个configuration是否生效. 具体操作是通过其两个属性name以及havingValue来实现的,其中name用来从application.properties中读取某个属性值,如果该值为空,则返回false; 如果值不为空,则将该值与havingValue指定的值进行比较,如果一样则返回true;否则返回false.如果返回值为false,则该configuration不生效:为true则…
http://stackoverflow.com/questions/26394778/what-is-purpose-of-conditionalonproperty-annotation **************************************************** I just modified spring boot configuration, and encountered @ConditionalOnProperty(prefix = "spring.so…
1. 简介 Spring Boot通过@ConditionalOnProperty来控制Configuration是否生效 2. 说明 @Retention(RetentionPolicy.RUNTIME) @Target({ ElementType.TYPE, ElementType.METHOD }) @Documented @Conditional(OnPropertyCondition.class) public @interface ConditionalOnProperty { St…
一 源码解析 查看ConditionalOnProperty的源码 package org.springframework.boot.autoconfigure.condition; import java.lang.annotation.Documented; import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionP…
在Spring Boot的自动配置中经常看到@ConditionalOnProperty注解的使用,本篇文章带大家来了解一下该注解的功能. Spring Boot中的使用 在Spring Boot的源码中,比如涉及到Http编码的自动配置.数据源类型的自动配置等大量的使用到了@ConditionalOnProperty的注解. HttpEncodingAutoConfiguration类中部分源代码: @Configuration(proxyBeanMethods = false) @Enabl…
@ConditionalOnProperty https://blog.csdn.net/dalangzhonghangxing/article/details/78420057 @Conditional https://www.jianshu.com/p/b642dfff88db…
最近看了一段代码其中用到了@ConditionalOnProperty注解,直接没有了解过这个注解,今天看到了顺便了解一下 具体代码如下 @Configuration public class WebConfig { @Bean @ConditionalOnProperty(prefix = "rest", name = "auth-open", havingValue = "true", matchIfMissing = true) publi…