java寫寬頻連線.adsl撥號,並且檢測斷線自動重新串連,更換ip

package com.hua;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.util.Scanner;public class ConnectNetWork {/** * 執行CMD命令,並返回String字串 */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(), "GB2312"));String line;while ((line = br.readLine()) != null) {sbCmd.append(line + "\n");}return sbCmd.toString();}/** * 串連ADSL */public static boolean connAdsl(String adslTitle, String adslName, String adslPass) throws Exception {System.out.println("正在建立串連.");String adslCmd = "rasdial " + adslTitle + " " + adslName + " " + adslPass;String tempCmd = executeCmd(adslCmd);// 判斷是否串連成功if (tempCmd.indexOf("已串連") > 0) {System.out.println("已成功建立串連.");return true;} else {System.err.println(tempCmd);System.err.println("建立串連失敗");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("沒有串連") != -1) {System.err.println(adslTitle + "串連不存在!");return false;} else {System.out.println("串連已斷開");return true;}}/**   * 測試網路是否串連   */ public static boolean isConnect(){        boolean connect = false;        Runtime runtime = Runtime.getRuntime();        Process process;        try {            process = runtime.exec("ping " + "www.baidu.com");            InputStream is = process.getInputStream();             InputStreamReader isr = new InputStreamReader(is);             BufferedReader br = new BufferedReader(isr);             String line = null;             StringBuffer sb = new StringBuffer();             while ((line = br.readLine()) != null) {                 sb.append(line);             }             System.out.println("傳回值為:"+sb);              is.close();             isr.close();             br.close();              if (null != sb && !sb.toString().equals("")) {                 String logString = "";                 if (sb.toString().indexOf("TTL") > 0) {                     // 網路暢通                      connect = true;                } else {                     // 網路不暢通                      connect = false;                }             }         } catch (IOException e) {            e.printStackTrace();        }         return connect;    } //測試代碼public static void main(String[] args) throws InterruptedException,  Exception { Scanner sc = new Scanner(System.in);  System.out.println("寬頻連線名稱:"); //看你寬頻連線的名稱  String name = sc.next();  System.out.println("寬頻賬戶:");   String username = sc.next();  System.out.println("寬頻密碼:");   String password = sc.next();   String adsl= "寬頻連線";  while(true){     boolean connect = isConnect();          Thread.sleep(100000);//單位毫秒,我設定的是100秒.自己看情況更改          if(!connect){          System.out.println("無網路,正在重新撥號");              connAdsl(name,username,password);          }  }  }}

 /**   * 自動更換ip   * */   

 public void changeIp() throws Exception{    Scanner sc = new Scanner(System.in);    System.out.println("寬頻連線名稱:"); // 看你寬頻連線的名稱    String name = sc.next();    System.out.println("寬頻賬戶:");    String username = sc.next();    System.out.println("寬頻密碼:");    String password = sc.next();    System.out.println("更換時間(單位毫秒1秒等於1000毫秒):");    int wait = sc.nextInt();    while(true){      connAdsl(name, username, password);      Thread.sleep(wait);      cutAdsl(name);      Thread.sleep(wait);      //再連，分配一個新的IP      connAdsl(name, username, password);    }    }