java执行cmd命令和linux命令

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("");  
    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);  
    }  
}