如何获取生成的java进程的PID

Question

我正在编写几个java程序,并且在完成我想做的任何事情后,需要在单独的JVM中终止/清理.为此,我需要获取我正在创建的java进程的PID.

Answer 1

jps -l适用于Windows和Unix.您可以使用java程序调用此命令Runtime.getRuntime().exec.样本输出jps -l如下

9412 foo.bar.ClassName
9300 sun.tools.jps.Jps

您可能需要解析此问题,然后检查完​​全限定名称,然后从相应的行获取pid.

private static void executeJps() throws IOException {
    Process p = Runtime.getRuntime().exec("jps -l");
    String line = null;
    BufferedReader in = new BufferedReader(new InputStreamReader(
                                                p.getInputStream(), "UTF-8"));

    while ((line = in.readLine()) != null) {
        String [] javaProcess = line.split(" ");
        if (javaProcess.length > 1 && javaProcess[1].endsWith("ClassName")) {
            System.out.println("pid => " + javaProcess[0]);
            System.out.println("Fully Qualified Class Name => " + 
                                           javaProcess[1]);
        }
    }
}