java执行cmd命令和linux命令

文章出处http://blog.csdn.net/xh16319/article/details/17302947

一：window下执行cmd指定

一：window下执行cmd指定
程序例子：
[java] view plain copy
/*该方法实现文件自动复制功能。利用系统命令将指定文件名从源路径复制到目的路径
     * 如果目的路径不存在时，自动创建目的路径
     * */
public static boolean copyFile(String origpath, String destpath, String filename) throws Exception{
    String osName = System.getProperty("os.name");
    boolean flag = false;
    /*系统命令支持的操作系统Windows XP, 2000 2003 7*/
    if(!(osName.equalsIgnoreCase("windows XP") || osName.equalsIgnoreCase("windows 2000") || osName.equalsIgnoreCase("windows 2003") || osName.equalsIgnoreCase("windows 7"))){
        return flag;
    }
    Runtime rt = Runtime.getRuntime();
    Process p = null;
    File f = new File(destpath);
    if(!f.exists()){
        f.mkdirs();
    }
    int exitVal;
    p = rt.exec("cmd exe /c copy " + origpath+filename+" "+destpath);
    // 进程的出口值。根据惯例，0 表示正常终止。
    exitVal = p.waitFor();
    if(exitVal == 0){
        flag = true;
    }else{
        flag = false;
    }
    return flag;      

}  

    public static void main(String[] args) {  

        try {
            copyFile("D:\\DATA\\", "D:\\a\\", "131204.txt");
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }  

    }  

二：linux下执行shell命令
程序例子：
[java] view plain copy
package edu.test;
import java.io.InputStreamReader;
import java.io.LineNumberReader;  

    /**
     * java在linux环境下执行linux命令，然后返回命令返回值。
     * @author lee
     */
    public class ExecLinuxCMD {  

        public static Object exec(String cmd) {
            try {
                String[] cmdA = { "/bin/sh", "-c", cmd };
                Process process = Runtime.getRuntime().exec(cmdA);
                LineNumberReader br = new LineNumberReader(new InputStreamReader(
                        process.getInputStream()));
                StringBuffer sb = new StringBuffer();
                String line;
             while ((line = br.readLine()) != null) {
                    System.out.println(line);
                    sb.append(line).append("\n");
                }
                return sb.toString();
            } catch (Exception e) {
                e.printStackTrace();
            }
            return null;
        }  

        public static void main(String[] args) {
            // TODO Auto-generated method stub
            String pwdString = exec("pwd").toString();
            String netsString = exec("netstat -nat|grep -i \"80\"|wc -l").toString();  

            System.out.println("==========获得值=============");
            System.out.println(pwdString);
            System.out.println(netsString);
        }  

    }
执行结果：

Java调用命令行并获取执行结果

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

public class Command {
    public static void exeCmd(String commandStr) {
        BufferedReader br = null;
        try {
            Process p = Runtime.getRuntime().exec(commandStr);
            br = new BufferedReader(new InputStreamReader(p.getInputStream()));
            String line = null;
            StringBuilder sb = new StringBuilder();
            while ((line = br.readLine()) != null) {
                sb.append(line + "\n");
            }
            System.out.println(sb.toString());
        } catch (Exception e) {
            e.printStackTrace();
        }
        finally
        {
            if (br != null)
            {
                try {
                    br.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }  

    public static void main(String[] args) {
        String commandStr = "ping www.taobao.com";
        //String commandStr = "ipconfig";
        Command.exeCmd(commandStr);
    }
}