Java:是否可以自动向方法添加日志语句? [英] Java: Is it possible to automatically add log statements to methods?

问题描述

我的应用程序中的大多数方法都是这样编写的:

Most of the methods in my application are written like this:

public void m() {
    long t1 = System.currentTimeMillis();
    log.info("begin - m()");

    /* method body */

    long t2 = System.currentTimeMillis();
    log.info("end - m(), took " + (t2 - t1) + "ms.");
}

我希望我可以简单地注释我的方法并自动生成日志语句:

I wish I could simply annotate my method and have the log statements be automagically generated instead:

@Log("executionTime")
public void m() {
    /* method body */
}

关于如何继续使用这种方法的任何想法?有什么已知的解决方案吗?

Any ideas on how to proceed with this approach ? Is there any known solution ?

有人为此建议了 AOP.问题是，使用 AspectJ 或 Spring AOP，我必须描述所有方法，这些方法与方法本身中的日志调用一样多.

Someone suggested AOP for this. The problem is that with AspectJ or Spring AOP I would have to describe all the methods which ammounts to as much code as the log calls in the method itself.

推荐答案

AspectJ 和 Spring AOP 支持类似:

execution(* com.company.project..*.*(..))

将覆盖project的所有子包中的所有方法.所以不需要一一定义所有方法.

which will cover all methods in all sub-packages of project. So no need to define all methods one by one.

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