package net.peace.ann;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Repeatable;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.Method;
@Documented//包含到文档中
@Target(ElementType.METHOD)//设置放在长发上
@Retention(RetentionPolicy.RUNTIME)//设置在运行时可用
@interface Myanno{
int k=1;//注意接口中的属性是 static 和final的
public String name();//name没有默认值,在写注解时必须赋值
public int id() default 1;//设置默认值
}
public class TestAnn {
private int id;
private String name;
//设置注解,并赋值
@Myanno(name="peace1",id=1)
public int getId() {
return id;
}
//设置注解,并赋值
@Myanno(name="peace2",id=2)
public void setId(int id) {
this.id = id;
}
//设置注解,并赋值
@Myanno(name="peace3",id=3)
public String getName() {
return name;
}
//设置注解,并赋值
@Myanno(name="peace4",id=4)
public void setName(String name) {
this.name = name;
}
@Override//覆盖注解,标准注解;
public String toString() {
// TODO Auto-generated method stub
return super.toString();
}
public static void main(String[] args) {
try {
//获得方法数组
Class cls=Class.forName("net.peace.ann.TestAnn");
Method[] met=cls.getDeclaredMethods();
for(Method m:met){
//获得方法对应的注解
Myanno myanno=m.getAnnotation(Myanno.class);
if(myanno!=null)
System.out.println(m.getName()+":"+myanno.name()+":"+myanno.id()+myanno.k);
}
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}