@Bean注解使用样例

最新推荐文章于 2025-06-27 00:08:08 发布

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最新推荐文章于 2025-06-27 00:08:08 发布

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分类专栏： java web 文章标签： java

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User.java

public class User {

   private String username;
   private Integer age;
   public User(String username, int age) {
       // TODO Auto-generated constructor stub
       this.username = username;
       this.age = age;

   }
   public String getUserName() {
       return username;
   }
   public Integer getAge() {
       return age;
   }
   public void setUserName(String userName) {
       username = userName;
   }
   public void setAge(Integer age) {
       this.age = age;
   }
   @Override
   public String toString() {
       return "User [username=" + username + ", age=" + age + "]";
   }

}

MainConfig.java

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class MainConfig {

   @Bean
   public User getUser() {
       /*
       * 这里需要有一个构造方法
       */
       return new User("zhangsan", 26);
   }

}

BeanTest.java

import org.apache.catalina.core.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

public class BeanTest {

   public static void main(String[] args) {
       AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext(MainConfig.class);
       User userbean = applicationContext.getBean(User.class);
       System.out.println(userbean.toString());
   }
}