Spring学习04_脱离xml配置

1. 创建项目项目目录如下

── top
    └── shuaiguo
        ├── config
        │   ├── MyJavaConfig.java
        │   └── MyJavaConfig2.java
        └── pojo
            ├── User.java
            └── User2.java

2. 添加相关注解

@Configuration  
@Import(MyJavaConfig2.class)
public class MyJavaConfig {

    @Bean
    public User getUser(){
        return new User();
    }
}

增加@Configuration 标识这是个配置类
增加@Import(MyJavaConfig2.class) 引入其他配置类的内容
增加@Bean ，标识这是个bean,用于把bean添加到容器

3. 编写测试类

public class MyTest {

    @Test
    public void testCase001(){

        ApplicationContext context = new AnnotationConfigApplicationContext(MyJavaConfig.class);

        User user = context.getBean("getUser",User.class);
        User2 user2 = context.getBean("getUser2",User2.class);

        System.out.println(user.getName());
        System.out.println(user2.getName());

    }
}