java运行cmd命令并显示输出信息的例子

最新推荐文章于 2024-07-02 04:49:56 发布

原创最新推荐文章于 2024-07-02 04:49:56 发布 · 664 阅读

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文章标签：

#Java #thread #C #C++ #C#

本文提供了一个使用Java执行外部命令（如Windows CMD命令）并读取其输出和错误流的示例。通过创建自定义的`StreamDrainer`类来处理`Process`对象的输入和错误流，实现对命令执行过程的监控。

package cmd;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;

class StreamDrainer implements Runnable {
    private InputStream ins;

    public StreamDrainer(InputStream ins) {
        this.ins = ins;
    }

    public void run() {
        try {
            BufferedReader reader = new BufferedReader(
                    new InputStreamReader(ins));
            String line = null;
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

public class TestRunCmd {

    public static void main1(String[] args) {
        String[] cmd = new String[] { "cmd.exe", "/C", "wmic process get name" };
        try {
            Process process = Runtime.getRuntime().exec(cmd);

            new Thread(new StreamDrainer(process.getInputStream())).start();
            new Thread(new StreamDrainer(process.getErrorStream())).start();

            process.getOutputStream().close();

            int exitValue = process.waitFor();
            System.out.println("返回值：" + exitValue);
        } catch (Exception e) {
            e.printStackTrace();
        }

    }


}