【Spring】007-使用JavaConfig实现配置

tech2025-07-11  2

一、环境搭建

第一步:新建Moudle,并创建实体类User

package com.zibo.pojo; import org.springframework.beans.factory.annotation.Value; import org.springframework.stereotype.Component; @Component public class User { private String name; public String getName() { return name; } @Value("訾博") public void setName(String name) { this.name = name; } @Override public String toString() { return "User{" + "name='" + name + '\'' + '}'; } }

第二步:编写配置类

package com.zibo.config; import com.zibo.pojo.User; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; @Configuration //这个类也会被spring ioc容器接管 public class AppConfig { //注册一个Bean就相当于我们之前写的Bean @Bean public User getUser(){ return new User(); } }

第三步:编写测试类

package com.zibo; import com.zibo.config.AppConfig; import com.zibo.pojo.User; import org.springframework.context.ApplicationContext; import org.springframework.context.annotation.AnnotationConfigApplicationContext; public class MyTest { public static void main(String[] args) { //如果完全是使用了配置类进行配置,我们就必须通过AnnotationConfigApplicationContext来加载配置 ApplicationContext context = new AnnotationConfigApplicationContext(AppConfig.class); User user = context.getBean("getUser", User.class); System.out.println(user.getName()); } }

测试结果:

訾博

 

二、@Import导入其他配置类

第一步:创建另一个配置类

package com.zibo.config; import org.springframework.context.annotation.Configuration; @Configuration public class AppConfig2 { }

第二步:将AppConfig2导入到AppConfig

package com.zibo.config; import com.zibo.pojo.User; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.Import; @Configuration //这个类也会被spring ioc容器接管 @Import(AppConfig2.class) public class AppConfig { //注册一个Bean就相当于我们之前写的Bean,id为方法名getUser @Bean public User getUser(){ return new User(); } }

 

这种纯Java的配置方式,在SpringBoot中随处可见!

 

 

 

 

 

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