仅获取堆栈跟踪的前N行 [英] Fetch only first N lines of a Stack Trace

问题描述

我有一个Factory方法，它从ID调用中返回一个对象。

I have a Factory method that returns an object from a ID call.

模拟代码：

public static Object getById(String id) {
    Object o = CRUD.doRecovery(Class, id);
    if(o == null) {
         printLogMessage("recovery by ID returned Null: " + id);
         // would really like to show only a few lines of stack trace.
    }
    return o;
}

如何只显示堆栈跟踪的前N行（所以我知道方法的调用者）而不将整个堆栈跟踪转储到日志上或不得不依赖外部库？

How can I show only the first N lines of the stack trace (so I know the caller of the method) without dumping the whole stack trace on the log or having to rely on external libs?

推荐答案

我根据你的要求假设，你没有例外处理。在这种情况下，您可以从以下位置获取当前堆栈跟踪：

I'm assuming from what you are asking, that you don't have an exception to deal with. In which case you can get the current stack trace from:

StackTraceElement[] elements = Thread.currentThread().getStackTrace()

这将告诉你几乎所有你需要知道的关于你来自哪里的代码。

This will tell you pretty much everything you need to know about where you've come from in the code.

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