Jarron1

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package com.itheima.configuration; import com.itheima.annotation.EnableHelloWorld; import com.itheima.conditionl.ConditionalOnSystemProperty; import org.springframework.boot.autoconfigure.EnableAutoConfiguration; import org.springframework.context.annotation.Configuration; @Configuration //注解装配 @EnableHelloWorld//模块装配 @ConditionalOnSystemProperty(name = "user.name",value = "Mercy") public class HelloWorldAutoConfiguration { }