访问方面类中的类变量 [英] access class variable in aspect class

问题描述

我正在使用spring aspectj创建一个方面类，如下所示

i am creating an aspect class with spring aspectj as follow

@Aspect
public class AspectDemo {
  @Pointcut("execution(* abc.execute(..))")
     public void executeMethods() { }

 @Around("executeMethods()")
    public Object profile(ProceedingJoinPoint pjp) throws Throwable {
            System.out.println("Going to call the method.");
            Object output = pjp.proceed();
            System.out.println("Method execution completed.");
            return output;
    }

} 

现在我要访问该物业类abc的名称然后如何在方面类中访问它？
i想要在配置文件方法中显示abc类的名称属性

now i want to access the property name of class abc then how to acccess it in aspect class? i want to display name property of abc class in profile method

我的abc类如下

public class abc{
String name;

public void setName(String n){
name=n;
}
public String getName(){
 return name;
}

public void execute(){
System.out.println("i am executing");
}
}

如何在方面类中访问该名称？

How can i access the name in aspect class?

推荐答案

您需要获取对目标对象的引用并将其强制转换为您的类（在 instanceof之后） 检查，或许）：

You need to get a reference to the target object and cast it to your class (after an instanceof check, perhaps):

Object target = pjp.getTarget();
if (target instanceof Abc) {
    String name = ((Abc) target).getName();
    // ...
}

建议的方法（用于表现和类型安全）是指切入点中提到的目标：

The recommended approach (for performance and type safety) is to have the target mentioned in the pointcut:

@Around("executeMethods() && target(abc)")
public Object profile(ProceedingJoinPoint pjp, Abc abc) ....

但这只会匹配Abc类型目标的执行情况。

But this will only match the executions on a target of type Abc.

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