本例以Windows, JDK1.7 为基础，来演示Java 执行Command 命令。

在windows中我们可以使用cmd.exe来执行一些相关的命令，同样我们也可以使用java来调用系统的cmd.exe来执行命令。

例如使用Ping 命令：

在java中，通常使用Runtime.getRuntime().exec(?) 来执行命令：

实例代码：

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Process process = Runtime.getRuntime().exec(cmd);

BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()));

String line = "";
while ((line = bufferedReader.readLine()) != null) {
	stringBuilder.append(line + "\r\n" );
}

Ping 命令演示

JavaExcuteCmd.java

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package com.devnp.io;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class JavaExcuteCmd {

	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub

		System.out.println(excuteCmd("ping www.devnp.com"));
		
		System.out.println(excuteCmd("ping www.google.com"));
	}
	
	public static String excuteCmd(String cmd){
		StringBuilder stringBuilder = new StringBuilder();
		
		try {
			Process process = Runtime.getRuntime().exec(cmd);

			BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()));

			String line = "";
			while ((line = bufferedReader.readLine()) != null) {
				stringBuilder.append(line + "\r\n" );
			}

			bufferedReader.close();
		} catch (IOException e) {
			// TODO: handle exception
			
			System.err.println(e);
		}
		
		return stringBuilder.toString() ;
	}
	
}

运行结果：

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Pinging ew-926om399.aliapp.com [121.199.250.*] with 32 bytes of data:
Reply from 121.199.250.*: bytes=32 time=200ms TTL=86
Reply from 121.199.250.*: bytes=32 time=223ms TTL=88
Reply from 121.199.250.*: bytes=32 time=213ms TTL=86
Reply from 121.199.250.*: bytes=32 time=195ms TTL=88

Ping statistics for 121.199.250.*:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 195ms, Maximum = 223ms, Average = 207ms


Pinging www.google.com [220.255.6.*] with 32 bytes of data:
Reply from 220.255.6.*: bytes=32 time=4ms TTL=59
Reply from 220.255.6.*: bytes=32 time=10ms TTL=59
Reply from 220.255.6.*: bytes=32 time=4ms TTL=59
Reply from 220.255.6.*: bytes=32 time=5ms TTL=59

Ping statistics for 220.255.6.*:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 4ms, Maximum = 10ms, Average = 5ms