将大量的system.out.println重定向到.txt文件 [英] Redirect lots of system.out.println's to a .txt file

问题描述

可能重复：

Java程序，我有一个很长的方法，（我不认为是重要的发布，因为它不是重要的问题）有大量的println语句来打印到控制台的状态更新。

我不希望将这些打印输出到控制台，而是希望它们进入一个txt文件，以便以后可以存储它们并进行检查。

有没有一种简单的方法来重定向输出，而无需手动通过每个println语句？

如果不是，最好的方法是什么？

解决方案

< System类有一个静态方法， System.setOut（PrintStream out）。所有你需要做的就是创建你自己的PrintStream，写入一个文件，把它塞进这个方法，你就全部设置好了。

更脆弱的解决方案：Don'不要使用System.out.printFoo（...），而应该使用一个记录器，并根据您的需要更改记录级别。

Possible Duplicate:
Print java output to a file

In a Java program, I have a long method, (which I don't think is important to post since it's not vital to the question) that has a large number of println statements to print status updates to the console.

Instead of having these printout to the console, I'd like them to go into a txt file where I can store them and review them later.

Is there a simple way to redirect the output without manually going through each println statement?

If not, what's the best way to go about this?

解决方案

The System class has a static method, System.setOut(PrintStream out). All you have to do is create your own PrintStream that writes to a file, stuff it into this method and you're all set.

Better less fragile solution: Don't use System.out.printFoo(...) but instead just use a logger, and change the logging levels as it suits your purposes at that time.

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