如何调用带有参数作为注释的方法
可能的重复：
如何使方法被称为被动方法在调用方法之前
例如：
public class Robot{
public static void doSomethingBefore(){
System.out.println("Do something before sayHello");
}
}
public class Person {
@MethodListener(className="Robot",methodName="doSomethingBefore")
public void sayHello(){
System.out.println("hello");
}
public static void main(String[] args){
new Person().sayHello();
}
}
如果我使用注释这样做：
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD})
public @interface MethodListener {
public String className();
public String methodName();
}
输出将是：
在 sayHello 之前执行一些操作 你好，
现在如果我想在 doSomethingBefore 方法中进行一些更改：
public class Robot{
public static void doSomethingBefore(String name){
System.out.println("Do something before sayHello "+name);
}
}
注释定义应该是什么样子，即 MethodListener 注释中需要进行哪些更改？ 请告诉我... 提前致谢
Possible Duplicate:
How to make a method be called passive before invoke a method
for example:
public class Robot{
public static void doSomethingBefore(){
System.out.println("Do something before sayHello");
}
}
public class Person {
@MethodListener(className="Robot",methodName="doSomethingBefore")
public void sayHello(){
System.out.println("hello");
}
public static void main(String[] args){
new Person().sayHello();
}
}
If I do like this using the annotation :
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD})
public @interface MethodListener {
public String className();
public String methodName();
}
the output will be:
Do something before sayHello
hello
now if I want to make some changes in doSomethingBefore method :
public class Robot{
public static void doSomethingBefore(String name){
System.out.println("Do something before sayHello "+name);
}
}
how should the Annotation definition look like i. e. what changes are needed in MethodListener Annotation?
Please let me know...
Thanks in advance
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我发现这与这个问题严格相关 如何在调用方法之前使方法被动调用 甚至示例代码都是相同的。请先阅读这些答案（它会向您解释一些事情），然后添加更具体的问题。
I see that this is strictly connected with this question How to make a method be called passive before invoke a method Even sample code is the same. Please read those answers first (it will explain you some things) and then add more specific question.