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📄 ipcheckout.java

📁 java设计的网上信息查询系统
💻 JAVA
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🔍 
//inCheckOut.java

import java.io.*;
import java.net.*;
import java.util.StringTokenizer;
import javax.servlet.*;
import javax.servlet.http.*;

public class ipCheckOut extends HttpServlet
{
 String inputIP=null;
 short []a;
 short []b;
 short []c;
 short []d;
 String data[];
 int i;
 FileReader filein=null;
 BufferedReader filedata=null;
 String IPlist="";

 public void service(HttpServletRequest rq,HttpServletResponse rp) throws
   ServletException, IOException
    {
     rp.setContentType("text/html");
     PrintWriter out=rp.getWriter();
     String hname=rp.getParameter("hname");
     String IPfname=rp.getParameter("fname");
     out.println("<html><head><title>检查访问的IP地址是国内还是国外</title>");
     out.println("</head>");
     out.println("<body bgcolor='#808000'>");
     out.println("<p align='center'><font color='#FFFF00' size='4'>查询结果</font></p>");
     go(hname,IPfname,out);
     out.println("</table>");
     out.println("</body>");
     out.println("</html>");
   }


  public void go(String hname,String IPfname,PrintWriter out)throws IOException
   {
    InetAddress ipHost;
    String hoststr=null;
    int dash=0;
    try{
        if(hname!=null)
         {
          ipHost=InetAddress.getByName(hname);
          out.println("<table border='0' width='100%'>");
          out.println("<tr>");
          out.println("<td width='50%'><font color='#00FF00' size='3'>");
          out.println("Host name:" + ipHost.getHostName()+"</font></td>");
          out.println("<td width='50%'><font color='#00FF00' size='3'>");
          out.println("主机名：" + ipHost.getHostName()+"</font></td>");
          out.println("</tr>");
         }
        else
         {
          out.println("Please input an hostname"+"<br>");
          return;
         }
        if(IPfname != null)
          freeOrFee(IPfname,out);
       }catch(UnknownHostException e)
             {
              out.println("this hostname is illegal."+"<br>");
             }
   }


  public void freeOrFee(String IPfname,PrintWriter out) throws IOException
   {
    String str=null;
    String startIP=null;
    String endIP=null;
    a=new short[5];
    b=new short[5];
    c=new short[5];
    d=new short[5];
    boolean free=false;
    URL fileURL=null;

   try{
       fileURL=new URL(IPfname);
       InputStream is =fileURL.openStream();
       InputStreamReader isr = new InputStreamReader(is);
       BufferedReader filedata = new BufferedReader(isr);
       int i=0;
       while((str=filedata.readLine())!=null)
        {
         startIP=str.substring(0,18);
         startIP=startIP.trim();
         endIP=str.substring(18,36);
         endIP=endIP.trim();
         stringToInt(startIP,0);
         stringToInt(endIP,1);
         stringToInt(inputIP,2);
         for (int j=3;j<=4;j++)
          {
           a[j]=shortOrShort(a[j-3],a[j-2]);
           b[j]=shortOrShort(b[j-3],b[j-2]);
           c[j]=shortOrShort(c[j-3],c[j-2]);
           d[j]=shortOrShort(d[j-3],d[j-2]);
          }
         if((a[3]==a[4])&&(b[3]==b[4])&&(c[3]==c[4])&&(d[3]==d[4]))
          {
           free=true;
           out.println("<tr>");
           out.println("<td width='50%'><font color='#00FF00' size='3'>");
           out.println("This address is free." +" </font></td>");
           out.println("<td width='50%'><font color='#00FF00' size='3'>");
           out.println("这个地址是免费的。"+"</font></td>");
           out.println("</tr>");
             break;
          }
        }
       if(!free)
        {
         out.println("<tr>");
         out.println("<td width='50%'><font color='#00FF00' size='3'>");
         out.println("This address is on fee." + "</font></td>");
         out.println("<td width='50%'><font color='#00FF00' size='3'>");
         out.println("这个地址是付费的。"+"</font></td>");
         out.println("</tr>");
        }
      }catch (IOException e){out.println(e.toString()+"<br>");}
   }


  public short shortOrShort(short x,short y)
   {
    short z=0;
    z=(short)(x|y);
    return z;
   }


  public void stringToInt(String str,int j)
   {
    StringTokenizer st=new StringTokenizer(str,".");
    a[j]=Short.parseShort(st.nextToken());
    b[j]=Short.parseShort(st.nextToken());
    c[j]=Short.parseShort(st.nextToken());
    d[j]=Short.parseShort(st.nextToken());
    if(st.hasMoreToken())
     {
      handleArg(st.nextToken(""));
     }
    else
     {
      handleArg(null);
     }
   }


 public void handleArg(String s){}

}

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