java写宽带连接.adsl拨号 并且检测断线自动重新连接 更换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 {/*** 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(), "GB2312"));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;}}/*** 测试网络是否连接*/public static boolean isConnect(){boolean connect = false;Runtime runtime = Runtime.getRuntime();Process process;try {process = runtime.exec("ping " + "");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("返回值为:"+sb); is.close(); isr.close(); br.close(); if (null != sb && !sb.toString().equals("")) { String logString = ""; if (sb.toString().indexOf("TTL") > 0) { // 网络畅通 connect = true;} else { // 网络不畅通 connect = false;} } } catch (IOException e) {e.printStackTrace();} return connect;}//测试代码public static void main(String[] args) throws InterruptedException,Exception { Scanner sc = new Scanner(System.in);System.out.println("宽带连接名称:"); //看你宽带连接的名称String name = sc.next();System.out.println("宽带账户:"); String username = sc.next();System.out.println("宽带密码:"); String password = sc.next(); String adsl= "宽带连接";while(true){ boolean connect = isConnect();Thread.sleep(100000);//单位毫秒,我设置的是100秒.自己看情况更改if(!connect){System.out.println("无网络,正在重新拨号");connAdsl(name,username,password);}}}}

/*** 自动更换ip* */

public void changeIp() throws Exception{Scanner sc = new Scanner(System.in);System.out.println("宽带连接名称:"); // 看你宽带连接的名称String name = sc.next();System.out.println("宽带账户:");String username = sc.next();System.out.println("宽带密码:");String password = sc.next();System.out.println("更换时间(单位毫秒1秒等于1000毫秒):");int wait = sc.nextInt();while(true){connAdsl(name, username, password);Thread.sleep(wait);cutAdsl(name);Thread.sleep(wait);//再连，分配一个新的IPconnAdsl(name, username, password);}}