转自:https://blog.csdn.net/heyutao007/article/details/74994161
@Import注解就是之前xml配置中的import标签,可以用于依赖第三方包中bean的配置和加载
在4.2之前只支持导入配置类
在4.2,@Import注解支持导入普通的java类,并将其声明成一个bean
- public class DemoService {
- public void doSomething(){
- System.out.println("ok");
- }
- }
- import org.springframework.context.annotation.Configuration;
- import org.springframework.context.annotation.Import;
- @Configuration
- @Import(DemoService.class)//在spring 4.2之前是不不支持的
- public class DemoConfig {
- }
运行
- import org.springframework.context.annotation.AnnotationConfigApplicationContext;
- public class Main {
- public static void main(String[] args) {
- AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext("com..example");
- DemoService ds = context.getBean(DemoService.class);
- ds.doSomething();
- }
- }
输出结果
ok