package com.selenium.test;import java.io.BufferedReader;import java.io.InputStream;import java.io.InputStreamReader;public class ConnectNetWork {  /**   * @param args   * @throws Exception    */  public static void main(String[] args) throws Exception {    // TODO Auto-generated method stub    connAdsl("VPN_Test","test", "test");     Thread.sleep(1000);     cutAdsl("VPN_Test");     Thread.sleep(1000);   }  /**    * 執行CMD命令,并返回String字符串    */   public static String executeCmd(String strCmd) throws Exception {    System.out.println("cmd /c " + strCmd);    Process p = Runtime.getRuntime().exec("cmd /c " + strCmd);     StringBuilder sbCmd = new StringBuilder();    //這里很重要，設置GB2312解決亂碼?。?！    //如果程序默認編碼就是GB2312，可以不寫    //我NetBeans默認用UTF8    BufferedReader br = new BufferedReader(new InputStreamReader(p         .getInputStream(), "GB2312"));     String line;     while ((line = br.readLine()) != null) {       sbCmd.append(line + "/n");     }    return sbCmd.toString();         /*    //如果整個過程換成這樣，就更清楚了。getInputStream是獲取最原始的字節流，    //cmd返回的是以GB2312雙字節編碼的字節流    InputStream in = p.getInputStream();    byte[] b = new byte[2000];    in.read(b);    String msg = new String(b, "GB2312");    //用GB2312解釋這堆字節，就可以組裝成一個正常的String了    //如果上邊不寫GB2312，等于這里用UTF8組裝，結果一樣    return msg;    */  }    /**    * 連接ADSL    * 語法： rasdial 連接名稱 username password    * 實例： rasdial 我的寬帶 hzhz1234567890 dfdfdfdfdf    */   public static boolean connAdsl(String adslTitle, String adslName, String adslPass) throws Exception {     System.out.println("正在建立連接.");     String adslCmd = "rasdial " + adslTitle + " " + adslName + " " + adslPass;     String tempCmd = executeCmd(adslCmd);     //String tempCmd = executeCmd("ping www.youku.com");         // 判斷是否連接成功     if (tempCmd.indexOf("已連接") > 0) {       System.out.println("已成功建立連接.");       return true;     } else {       System.err.println(tempCmd);       System.err.println("建立連接失敗");       return false;     }   }    /**    * 斷開ADSL    */   public static boolean cutAdsl(String adslTitle) throws Exception {     String cutAdsl = "rasdial " + adslTitle + " /disconnect";     String result = executeCmd(cutAdsl);          if (result.indexOf("沒有連接")!=-1){       System.err.println(adslTitle + "連接不存在!");       return false;     } else {       System.out.println("連接已斷開");       return true;     }   } }