Question

我在Windows中运行一个java程序，用于从Windows事件中收集日志。创建.csv文件，在该文件上执行某些操作。

执行命令和管道。如何让我的Java程序等到进程完成？

以下是我正在使用的代码段：

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.

Answer 1

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

Answer 2

我在这里找到了答案Run shell script from Java Synchronously

public static void executeScript(String script) {
    try {
        ProcessBuilder pb = new ProcessBuilder(script);
        Process p = pb.start(); // Start the process.
        p.waitFor(); // Wait for the process to finish.
        System.out.println("Script executed successfully");
    } catch (Exception e) {
        e.printStackTrace();
    }
}

Answer 3

这应该有效。如果没有，请指定什么不起作用

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 +"\"");
    powershell.waitFor();
} catch (IOException e) { }
// remaining code

Java：等待exec进程直到它退出

3 个答案: