Question

有没有办法在Java应用程序中运行此命令行？

java -jar map.jar time.rel test.txt debug

我可以使用命令运行它，但我无法在Java中执行它。

Answer 1

Runtime rt = Runtime.getRuntime();
Process pr = rt.exec("java -jar map.jar time.rel test.txt debug");

http://docs.oracle.com/javase/7/docs/api/java/lang/Runtime.html

Answer 2

您还可以观看输出：

final Process p = Runtime.getRuntime().exec("java -jar map.jar time.rel test.txt debug");

new Thread(new Runnable() {
    public void run() {
     BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));
     String line = null; 

     try {
        while ((line = input.readLine()) != null)
            System.out.println(line);
     } catch (IOException e) {
            e.printStackTrace();
     }
    }
}).start();

p.waitFor();

不要忘记，如果你在Windows中运行，你需要放置＆＃34; cmd / c＆＃34;在你的命令面前。

Answer 3

为了避免在标准输出和/或错误输出大量数据时阻止被调用进程，您必须使用Craigo提供的解决方案。另请注意，ProcessBuilder优于Runtime.getRuntime（）。exec（）。这有几个原因：它更好地标记参数，并且还处理错误标准输出（同时检查here）。

ProcessBuilder builder = new ProcessBuilder("cmd", "arg1", ...);
builder.redirectErrorStream(true);
final Process process = builder.start();

// Watch the process
watch(process);

我使用新功能＆＃34;观看＆＃34;在新线程中收集此数据。当被调用的进程结束时，该线程将在调用进程中完成。

private static void watch(final Process process) {
    new Thread() {
        public void run() {
            BufferedReader input = new BufferedReader(new InputStreamReader(process.getInputStream()));
            String line = null; 
            try {
                while ((line = input.readLine()) != null) {
                    System.out.println(line);
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }.start();
}

Answer 4

import java.io.*;

Process p = Runtime.getRuntime().exec("java -jar map.jar time.rel test.txt debug");

如果您遇到任何其他问题，请考虑以下问题，但我猜测上述内容对您有用：

Problems with Runtime.exec()

Answer 5

Runtime.getRuntime().exec("java -jar map.jar time.rel test.txt debug");

Answer 6

怎么样

public class CmdExec {

public static Scanner s = null;


public static void main(String[] args) throws InterruptedException, IOException {
    s = new Scanner(System.in);
    System.out.print("$ ");
    String cmd = s.nextLine();
    final Process p = Runtime.getRuntime().exec(cmd);

    new Thread(new Runnable() {
        public void run() {
            BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));
            String line = null; 

            try {
                while ((line = input.readLine()) != null) {
                    System.out.println(line);
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }).start();

    p.waitFor();
     }

 }

Answer 7

Process p = Runtime.getRuntime().exec("java -jar map.jar time.rel test.txt debug");

Answer 8

您是否在Runtime类中尝试过exec命令？

Runtime.getRuntime().exec("java -jar map.jar time.rel test.txt debug")

Runtime - Java Documentation

在Java中运行命令行

8 个答案: