blob: 1e613c661ab3e0e96dc4a36493c6747c7726819a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
package com.example.spring;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class App {
public static void main(String[] args) {
@SuppressWarnings("resource")
ApplicationContext ctx = new AnnotationConfigApplicationContext(App.class);
MathsUser mathsUser = ctx.getBean(MathsUser.class);
mathsUser.doTask();
}
@Bean
public Maths maths() {
Maths maths = new Maths();
maths.setB(100);
return maths;
}
@Bean
public MathsUser mathsUser() {
MathsUser mathsUser = new MathsUser();
/*
* What would the maths() return? Would it be the Spring managed bean or what
* would be returned when the maths() method is directly invoked?
*
* @Bean can be used with classes annotated with @Component tool.
*
* In a class annotated with @Configuration, maths() return the Spring managed bean.
*
* In a class annotated with @Component, what is returned by maths() is not the
* Spring managed bean, but what would be returned when the maths() method is directly invoked.
*
* For more details, look at the 'Full @Configuration vs “lite” @Bean mode?' description
* found in the 'Core Technologies' section of the Spring Framework Reference documentation.
*/
mathsUser.setMaths(maths());
return mathsUser;
}
}
|
