如果已经在Java中打开,如何关闭程序

我正在写这个服务器,我想检查相同的程序是否已经在运行,如果正在运行关闭程序.

说我运行ServerA

然后我运行ServerB(这是相同的服务器)

我想关闭ServerA,以便ServerB可以成功运行.

解决方法:

好吧,我设法做到这样……

public static void main(String[] args){
    String PIDtoKill = readPIDFile();
    if(!PIDtoKill.isEmpty())
        killPID(PIDtoKill);
    saveThisPIDtoFile();
}

使用方法….

private static String readPIDFile() {
    try {
        for (String line : Files.readAllLines(Paths.get("C:\\Users\\MyUser\\Desktop\\PIDsRunning.txt")))
            return line;
    }
    catch (IOException e1) {
        e1.printStackTrace();
    }
    return "";
}

private static void saveThisPIDtoFile() {
    String pid = ManagementFactory.getRuntimeMXBean().getName();
    pid = pid.substring(0, pid.indexOf("@"));

    List<String> lines = Arrays.asList(pid);
    Path file = Paths.get("C:\\Users\\MyUser\\Desktop\\PIDsRunning.txt");

    try {
        Files.write(file, lines, Charset.forName("UTF-8"));
    }
    catch (IOException e) {
        e.printStackTrace();
    }
}

private static void killPID(String pIDtoKill) {
    try {
        Runtime.getRuntime().exec("taskkill /F /PID " + pIDtoKill);
    }
    catch (IOException e) {
        e.printStackTrace();
    }
}

标签：java,interprocess
来源： https://codeday.me/bug/20190706/1392420.html