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Count new users only

Source: Internet
Author: User
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Count new users only
Table Structure tb_newusercount field user_id, user_ip, user_times
DB type
Package com. Count. online;

Import java. SQL .*;

Public class dB {
Private connection con;
Private statement STM;
Private resultset RS;
Private string classname = "com. Microsoft. JDBC. sqlserver. sqlserverdriver ";
Private string

Url = "JDBC: Microsoft: sqlserver: // localhost: 1433; databasename = db_database08 ";

Public dB (){}
Public connection getcon (){
Try {
Class. forname (classname );
}
Catch (classnotfoundexception e ){
E. printstacktrace ();
}
Try {
Con = drivermanager. getconnection (URL, "sa ","");
}
Catch (exception e ){
E. printstacktrace (system. Err );
Con = NULL;
}
Return con;
}
Public Statement getstm (){
Try {
Con = getcon ();
STM = con. createstatement ();
} Catch (exception e) {e. printstacktrace (system. Err );}
Return STM;
}
Public Statement getstmed (){
Try {
Con = getcon ();
STM = con. createstatement

(Resultset. type_scroll_insensitive, resultset. concur_read_only );
} Catch (exception e) {e. printstacktrace (system. Err );}
Return STM;
}
Public resultset search (string SQL ){
Getstmed ();
Try {
Rs1_cmd.exe cutequery (SQL );
} Catch (exception e) {e. printstacktrace ();}
Return Rs;
}
Public int dosql (string SQL ){
Int I =-1;
Getstmed ();
Try {
I =cmd.exe cuteupdate (SQL );
} Catch (exception e) {e. printstacktrace ();}
Return I;
}
Public void closed (){
Try {
If (RS! = NULL) Rs. Close ();
}
Catch (exception e) {e. printstacktrace ();}
Try {
If (STM! = NULL) STM. Close ();
}
Catch (exception e) {e. printstacktrace ();}
Try {
If (con! = NULL) con. Close ();
}
Catch (exception e) {e. printstacktrace ();}
}
}
Countonline. Java class
Package com. Count. online;

Import java. SQL .*;
Public class countonline {
Private string userip;
Private string nowdate;
Private int times;
Private dB DB = new dB ();
Public countonline (){}
Public void setuserip (string userip ){
This. userip = userip;
}
Public String getuserip (){
Return this. userip;
}
Public void setnowdate (string nowdate ){
This. nowdate = nowdate;
}
Public String getnowdate (){
Return this. nowdate;
}
Public void settimes (INT times ){
This. Times = times;
}
Public int gettimes (){
Return this. times;
}
Public resultset checkuser (){
String SQL = "select * From tb_newusercount where

User_ip = '"+ this. userip + "'";
Resultset rs = NULL;
Try {
Rs = dB. Search (SQL );
If (Rs. Next ()){
This. Times = Rs. getint ("user_times") + 1;
SQL = "Update tb_newusercount set user_times =" + this. Times + "where

User_ip = '"+ this. userip + "'";
DB. dosql (SQL );
}
Else {
This. Times = 1;
SQL = "insert into tb_newusercount values ('" + this. userip + "', 1 )";
DB. dosql (SQL );
}
Rs = dB. Search ("select * From tb_newusercount ");
} Catch (exception e) {e. printstacktrace ();}
Return Rs;
}
Public void dbclose (){
DB. Closed ();
}
}
Index. jsp
<% @ Page contenttype = "text/html; charset = gb2312" %>
<% @ Page import = "Java. SQL. *" %>
<JSP: usebean id = "mycount" class = "com. Count. Online. countonline"/>
<%
String IP = request. getremoteaddr ();
Mycount. setuserip (IP );
Resultset rs = mycount. checkuser ();
Rs. Last ();
Int num = Rs. getrow ();
%>
<HTML>
<Head>
<Title> only counters for new users </title>
<LINK rel = "stylesheet" type = "text/CSS" href = "CSS/style.css">
</Head>
<Body>
<Center>
<Table Height = "90" width = "200" border = "1" bordercolor = "black"

Bordercolorlight = "black" bordercolordark = "white" cellspacing = "0" style = "margin-

Top: 200 ">
<Tr bgcolor = "lightgrey">
<TD align = "center"> visitor IP address </TD>
<TD align = "center"> Number of visits </TD>
</Tr>
<%
Rs. beforefirst ();
While (Rs. Next ()){
%>
<Tr>
<TD align = "center"> <% = Rs. getstring ("user_ip") %> </TD>
<TD align = "center"> <% = Rs. getint ("user_times") %> </TD>
</Tr>
<%
}
%>
<Tr>
<TD align = "center" colspan = "2">
Your IP address is: <% = IP %>
<Br>
Your access times: <% = mycount. gettimes () %>
<Br>
A total of <% = num %> new users have accessed this page (IP addresses are used to calculate how many users have accessed this page)
</TD>
</Tr>
</Table>
<%
Mycount. dbclose ();
%>
</Center>
</Body>
</Html>
 

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

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