Java:等待 exec 进程直到它退出 [英] Java: wait for exec process till it exits

问题描述

我正在 Windows 中运行一个 Java 程序，该程序从 Windows 事件中收集日志.将创建一个 .csv 文件，在该文件上执行某些操作.

I am running a java program in Windows that collects log from Windows events. A .csv file is created on which certain operations are to be performed.

命令被执行和管道传输.如何让我的 Java 程序等待进程完成?

The commands are execed and piped. How can I cause my Java program to wait until the process is finished?

这是我使用的代码片段:

Here is the code snippet I am using:

Runtime commandPrompt = Runtime.getRuntime();
try {           
    Process powershell = commandPrompt.exec("powershell -Command "get-winevent -FilterHashTable @{ logname = 'Microsoft-Windows-PrintService/Operational';StartTime = '"+givenDate+" 12:00:01 AM'; EndTime = '"+beforeDay+" 23:59:59 ';  ID = 307 ;} | ConvertTo-csv| Out-file "+ file +""");
//I have tried waitFor() here but that does not seem to work, required command is executed but is still blocked
} catch (IOException e) { }
// Remaining code should get executed only after above is completed.

推荐答案

您需要使用 waitFor() 而不是 wait().这样你的线程就会阻塞，直到执行的命令完成.

You need to use waitFor() instead of wait(). That way your thread will block until the executed command finishes.

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