调用 Runtime.exec 时捕获标准输出 [英] Capturing stdout when calling Runtime.exec

问题描述

在客户端机器上遇到网络问题时，我希望能够运行几个命令行并将结果通过电子邮件发送给我自己.

When experiencing networking problems on client machines, I'd like to be able to run a few command lines and email the results of them to myself.

我发现 Runtime.exec 将允许我执行任意命令，但将结果收集到一个字符串中更有趣.

I've found Runtime.exec will allow me to execute arbitrary commands, but Collecting the results in a String is more interesting.

我意识到我可以将输出重定向到一个文件，然后从该文件中读取，但我的诡异感告诉我有一种更优雅的方式来做到这一点.

I realize I could redirect output to a file, and then read from the file, but my spidey sense is telling me there's a more elegant way of doing it.

建议?

推荐答案

您需要同时捕获过程中的 std out 和 std err.然后，您可以将标准输出写入文件/邮件或类似文件.

You need to capture both the std out and std err in the process. You can then write std out to a file/mail or similar.

请参阅这篇文章有关更多信息，请特别注意 StreamGobbler 机制，它在单独的线程中捕获 stdout/err.这对于防止阻塞至关重要，如果操作不当，则会导致许多错误！

See this article for more info, and in particular note the StreamGobbler mechanism that captures stdout/err in separate threads. This is essential to prevent blocking and is the source of numerous errors if you don't do it properly!

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