Java call windows command

http://winter8.iteye.com/blog/434683
http://sesame.iteye.com/blog/434088

博主写得不错！下面都是copy的，看原文吧。

import java.io.BufferedReader;  
import java.io.InputStreamReader;  
  
public class ConnectNetWork 
{  
    public static void main(String[] args) throws Exception 
    {  
        connAdsl("宽带","hzhz**********","******");  
        Thread.sleep(1000);  
        cutAdsl("宽带");  
        Thread.sleep(1000);  
        //再连，分配一个新的IP  
        connAdsl("宽带","hzhz**********","******");  
    } 
  
    /** 
     * 执行CMD命令,并返回String字符串 
     */  
    public static String executeCmd(String strCmd) throws Exception {  
        Process p = Runtime.getRuntime().exec("cmd /c " + strCmd);  
        StringBuilder sbCmd = new StringBuilder();  
        BufferedReader br = new BufferedReader(new InputStreamReader(p  
                .getInputStream()));  
        String line;  
        while ((line = br.readLine()) != null) {  
            sbCmd.append(line + "\n");  
        }  
        return sbCmd.toString();  
    }  
  
    /** 
     * 连接ADSL 
     */  
    public static boolean connAdsl(String adslTitle, String adslName, String adslPass) throws Exception {  
        System.out.println("正在建立连接.");  
        String adslCmd = "rasdial " + adslTitle + " " + adslName + " "  
                + adslPass;  
        String tempCmd = executeCmd(adslCmd);  
        // 判断是否连接成功  
        if (tempCmd.indexOf("已连接") > 0) {  
            System.out.println("已成功建立连接.");  
            return true;  
        } else {  
            System.err.println(tempCmd);  
            System.err.println("建立连接失败");  
            return false;  
        }  
    }  
  
    /** 
     * 断开ADSL 
     */  
    public static boolean cutAdsl(String adslTitle) throws Exception {  
        String cutAdsl = "rasdial " + adslTitle + " /disconnect";  
        String result = executeCmd(cutAdsl);  
         
        if (result.indexOf("没有连接")!=-1){  
            System.err.println(adslTitle + "连接不存在!");  
            return false;  
        } else {  
            System.out.println("连接已断开");  
            return true;  
        }  
    }  
}