JAVA调用Linux/Unix CMD

本文主要想说明：在开发过程中，要善于利用JAVA面向对象编程的优势，与Linux/Unix Shell命令的优势，并将二者相结合。

JAVA代码：

package shuai.study.cmd;

import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;
import java.util.List;

import org.apache.commons.io.IOUtils;

public class TestCmd {

	public static InputStream executeCmd(String cmd) {
		String[] cmdArray = new String[] { "bash", "-c", cmd };

		Runtime runtime = Runtime.getRuntime();
		Process process = null;

		try {
			process = runtime.exec(cmdArray);
		} catch (IOException e) {
			e.printStackTrace();
		}

		return process.getInputStream();
	}

	public static void readInputStream(InputStream inputStream) {
		try {
			List<String> list = IOUtils.readLines(inputStream);

			Iterator<String> iterator = list.iterator();
			while (iterator.hasNext()) {
				String line = iterator.next();

				System.out.println(line);
			}
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			IOUtils.closeQuietly(inputStream);
		}
	}

	public static void main(String[] args) {
		String cmd = "awk -F':' '{print $NF}' /etc/passwd";

		if (args != null && args.length > 0) {
			cmd = args[0];
		}

		InputStream inputStream = TestCmd.executeCmd(cmd);
		TestCmd.readInputStream(inputStream);
	}
}

运行脚本run.sh:

#!/bin/bash

java -Djava.ext.dirs=../lib -Xverify:none -Xms1024m -Xmx2048m -Xmn512m -XX:PermSize=96m -XX:MaxPermSize=96m -XX:+DisableExplicitGC -Xnoclassgc -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=85 shuai.study.cmd.TestCmd "$*"

安装包java-cmd.zip：java-cmd.zip