ip 验证

if(kk_BlacklistVehicle_UserEnrol_IP.length()>15)   
   {//判断输入的大于15位的直接出错   
    errors.add("errorKK_BlacklistVehicle_UserEnrol",new ActionMessage("kk_BlacklistVehicle_UserEnrol_IP.leng")) ;   
   }   
   else  
   {   
    StringTokenizer st = new StringTokenizer(kk_BlacklistVehicle_UserEnrol_IP,".",false);//去掉IP地址中的'.'   
    System.out.println( "Token Total: " + st.countTokens() );//分出了几个字符串   
    if(st.countTokens()!=4)   
    {//判断截取出来的字符串如果不是4段直接出错   
     errors.add("errorKK_BlacklistVehicle_UserEnrol",new ActionMessage("kk_BlacklistVehicle_UserEnrol_IP.GeShi")) ;   
    }   
    boolean b = true;   
    int cou = 1 ;   
    while( st.hasMoreElements() )   
    {   
     cou++;   
     for (int i = st.nextToken().length();--i>=0;)   
     {   
      //判断去掉'.'后其他字符是否都是数字   
      if (!(kk_BlacklistVehicle_UserEnrol_IP.charAt(i) >= 48 && kk_BlacklistVehicle_UserEnrol_IP.charAt(i) <= 57))    
      {//判断除了数字还有其他字符直接出错   
       System.out.println("您输入的IP中除了数字和.还包括了其他字符!请重新输入.");   
       errors.add("errorKK_BlacklistVehicle_UserEnrol",new ActionMessage("kk_BlacklistVehicle_UserEnrol_IP.ZiFu")) ;   
       b = false;   
       break;   
      }   
      else  
      {   
       b = true;   
      }   
     }   
    }   
       
        
    StringTokenizer str = new StringTokenizer(kk_BlacklistVehicle_UserEnrol_IP,".",false);//去掉IP地址中的'.'   
    System.out.println( "Token Total: " + str.countTokens() );   
    while( str.hasMoreElements() )   
    {   
     cou++;   
     str.nextToken();   
    }   
    while( str.hasMoreElements() )   
    {   
     if(b)   
     {   
      for (int i = 1;i<cou;i++)   
      {   
       String token = str.nextToken() ;   
       int stSize = Integer.parseInt(token);   
       System.out.println(token);   
  
       if (stSize>255||stSize<0)   
       {   
        System.out.println("您输入的IP段不在0~255之间！请重新输入");   
        errors.add("errorKK_BlacklistVehicle_UserEnrol",new ActionMessage("kk_BlacklistVehicle_UserEnrol_IP.Size")) ;   
        b = false;   
        break;   
       }   
       else  
       {   
        b = true;   
       }   
      }   
     }   
     else  
     {   
      break ;   
     }   
    }   
    boolean isIP = true;   
    int j = 0 ;   
    if(b)   
    {   
     //去掉'.'后其他字符是否都是数字进入到此if   
     int count = 0;   
     String temp = kk_BlacklistVehicle_UserEnrol_IP;   
     if(temp.charAt(0) == '.' || temp.charAt(temp.length()-1) == '.' || temp.length()>15)   
     {   
      //判断第一位和最后一位是不是'.'，是的话isIp设置为false   
      isIP = false;   
     }   
     //这个for循环判断'.'是不是3个，如果不是3个，设置isIP为fasle   
     for(int i=0;i<temp.length();i++)   
     {   
      j++ ;   
      if(temp.charAt(i) == '.')   
      {   
       count++;   
       j = 0 ;   
       if(temp.charAt(i)==temp.charAt(i+1))   
       {   
        count--;   
       }   
      }   
      if(temp.charAt(i) != '.')   
      {   
       //判断数字是不是多于3位了，比3位多就count--   
       if(j>3)   
       {   
        count--;   
       }   
      }   
      if(temp.charAt(i) == '0'&&(temp.charAt(i+1)=='1'||temp.charAt(i+1)=='2'||temp.charAt(i+1)=='3'||temp.charAt(i+1)=='4'||temp.charAt(i+1)=='5'||temp.charAt(i+1)=='6'||temp.charAt(i+1)=='7'||temp.charAt(i+1)=='8'||temp.charAt(i+1)=='9'))   
      {   
       //判断IP地址是否为这种形式，01.32.043.34，出现01，043这种格式不正确   
       count--;   
      }   
     }   
      if(count != 3)   
      {   
       isIP = false;   
      }   
    }   
    if(!isIP)   
    {   
     //isIP为false，提示错误信息   
     errors.add("errorKK_BlacklistVehicle_UserEnrol",new ActionMessage("kk_BlacklistVehicle_UserEnrol_IP.GeShi")) ;   
    }   
   }