Java本机进程超时 [英] Java native process timeout

问题描述

目前我使用以下方法执行本机进程:

At the moment I execute a native process using the following:

java.lang.Process process = Runtime.getRuntime().exec(command); 
int returnCode = process.waitFor();

假设我不想等待程序返回，而是希望在经过一定时间后终止.我该怎么做?

Suppose instead of waiting for the program to return I wish to terminate if a certain amount of time has elapsed. How do I do this?

推荐答案

Plexus CommandlineUtils 是这样做的:

This is how the Plexus CommandlineUtils does it:

Process p;

p = cl.execute();

...

if ( timeoutInSeconds <= 0 )
{
    returnValue = p.waitFor();
}
else
{
    long now = System.currentTimeMillis();
    long timeoutInMillis = 1000L * timeoutInSeconds;
    long finish = now + timeoutInMillis;
    while ( isAlive( p ) && ( System.currentTimeMillis() < finish ) )
    {
        Thread.sleep( 10 );
    }
    if ( isAlive( p ) )
    {
        throw new InterruptedException( "Process timeout out after " + timeoutInSeconds + " seconds" );
    }
    returnValue = p.exitValue();
}

public static boolean isAlive( Process p ) {
    try
    {
        p.exitValue();
        return false;
    } catch (IllegalThreadStateException e) {
        return true;
    }
}

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