springboot 事件监听

定义事件
@Getter
public class TestEvent extends ApplicationEvent {
private String msg;

public TestEvent(Object source, String msg) {
super(source);
this.msg = msg;
}
}
定义事件监听(注解方式)
@Component
public class TestListen {
@EventListener
public void testListen(TestEvent event) {
System.out.println(event.getMsg());
}
}
注意：@Component 注解
发布事件
@Autowired
private ApplicationContext publiser;

@GetMapping(“test-listen”)
public void testListen() {
for (int i = 0; i < 10; i++) {
System.out.println(“i = ” + i);
}
publiser.publishEvent(new TestEvent(this, “测试事件监听”));
for (int j = 0; j < 10; j++) {
System.out.println(“j = ” + j);
}
}
测试时执行顺序：

i循环
打印”event = [测试事件监听]”
j循环

异步监听
监听加上@Async注解
@Component
public class TestListen {
@EventListener
@Async
public void testListen(TestEvent event) {
for (int i = 0; i < 10; i++) {
System.out.println(“event = [” + event.getMsg() + “]”);
}
}
}
测试时执行顺序：

i循环
j循环
打印”event = [测试事件监听]”

代码： async