實體類：

package com.ly.pojo;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Controller;

@Component
public class User {
    private String name;

    public String getName() {
        return name;
    }
    @Value(
 
"凌雲")
    public void setName(String name) {
        this.name = name;
    }

    @Override
    public String toString() {
        return "User{" +
                "name='" + name + '\'' +
                '}';
    }
}

         

配置類：

package com.ly.config;

import com.ly.pojo.User;
import org.springframework.context.annotation.Bean;
 
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;

@Configuration
//代表這是一個配置類，相當於beans.xml
@ComponentScan("com.ly.pojo")
public class lyconfig {
    @Bean
    //註冊一個bean，相當於bean標籤；
    //方法的名字相當於bean標籤中的id屬性
    //這個方法的返回值，相當於bean標籤中的class屬性
 

    public User user(){
        return new User();
    }
}

測試類：

import com.ly.config.lyconfig;
import com.ly.pojo.User;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

public class MyTest {
    public static void main(String[] args) {
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(lyconfig.class);
        User getUser = context.getBean("user", User.class);
        System.out.println(getUser.getName());
    }
}

純java的配置在Springboot非常常見！