Original website: Spring Register Bean Series--Method 2: @Configuration+@Bean_IT The blog of the sharp knife out of the sheath - CSDN blog
Introduction
This article introduces the method of Spring registration Bean: @Configuration+@Bean.
I wrote a series of methods for registering beans, see: Spring Registering Beans (Providing Beans) Series--Method Encyclopedia
Method overview
Write a configuration class, marked @Configuration on the class. Write a method inside, the return value is the class to be registered, and add @Bean annotation to the method.
example
The class to be registered (Bean)
package com.knife.entity;
public class MyBean {
public String sayHello() {
return "Hello World";
}
}
configuration class
package com.knife.config;
import com.knife.entity.MyBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class MyBeanConfiguration {
@Bean
public MyBean myBean() {
return new MyBean();
}
}
test
package com.knife.controller;
import com.knife.entity.MyBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class HelloController {
@Autowired
private MyBean myBean;
@GetMapping("/test")
public String test() {
return myBean.sayHello();
}
}
result
