Log User Activities
Java-Log4j - HTML - Apache - Eclipse
Logging example:
22-06-2013 13:53:32 INFO LogInController:33 - 2K8CSE logs in. 22-06-2013 13:54:02 ERROR LogInController:40 - 2K8CSE failed to log in. 22-06-2013 13:54:16 ERROR LogInController:40 - ABCD failed to log in.
Screen shots:
After successful Log in:
Welcome to home page.
Steps:
1. Add log4j-1.2.16 jar file to the project.
2. Add log4j.properties to the project.
# Root logger option
log4j.rootLogger=INFO, file, stdout
# Direct log messages to a log file
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=C:\\Users\\nn\\Desktop\\nnEclipse4\\UserAuditExample\\systemlog.log
log4j.appender.file.MaxFileSize=1MB
log4j.appender.file.MaxBackupIndex=1
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{dd-MM-yyyy HH:mm:ss} %-5p %c{1}:%L - %m%n
# Direct log messages to stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{dd-MM-yyyy HH:mm:ss} %-5p %c{1}:%L - %m%n
3. In LogInController (controller, servlet) add the following code in constructor.Logger log = Logger.getLogger(LogInController.class);
4. Add the following code to log the information to the log file.
log.info(message); eg: log.info(username+" logs in."); log.error(username+" failed to log in.");
Project Explorer:
login.html
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Log in</title>
<script type="text/javascript">
function validateForm()
{
var x=document.getElementById("username");
if (x.value=="")
{
document.getElementById('username_innermsg').innerHTML="Please enter the User Name.";
x.focus();
return false;
}
document.getElementById('username_innermsg').innerHTML='';
var x=document.getElementById("paswd");
if (x.value=="")
{
document.getElementById('password_innermsg').innerHTML="Please enter the Password.";
x.focus();
return false;
}
document.getElementById('password_innermsg').innerHTML='';
}
function resetInnerHtmlMsgs() {
document.getElementById('username_innermsg').innerHTML='';
document.getElementById('password_innermsg').innerHTML='';
}
</script>
</head>
<body>
<center>
<h1>Log in</h1>
<form action="LogInController" method="post" onsubmit="return validateForm()">
<table>
<tr>
<td>User Name :</td><td><input type="text" name="username" id="username"></td><td width="200px"> <i style="color: red;" id="username_innermsg"></i></td>
</tr>
<tr>
<td>Password :</td><td><input type="password" name="paswd" id="paswd"></td><td width="200px"> <i style="color: red;" id="password_innermsg"></i></td>
</tr>
<tr><td><input type="submit" value="Login"></td><td><input type="reset" value="Cancel" onclick="resetInnerHtmlMsgs()"/></td></tr>
</table>
</form>
</center>
</body>
</html>
LogInController.java
package com.logexample.controller;
import java.io.IOException;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.log4j.Logger;
import com.logexample.model.LogIn;
@WebServlet("/LogInController")
public class LogInController extends HttpServlet {
private static final long serialVersionUID = 1L;
private Logger log;
public LogInController() {
super();
log = Logger.getLogger(LogInController.class);
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
LogIn login= new LogIn("2K8CSE", "Password@123");
RequestDispatcher rd= null;
String username= request.getParameter("username");
String password=request.getParameter("paswd");
if(username.equals(login.getUsername())&&password.equals(login.getPassword()))
{
log.info(username+" logs in.");
rd=request.getRequestDispatcher("success.html");
rd.forward(request, response);
return;
}
else
{
log.error(username+" failed to log in.");
rd=request.getRequestDispatcher("error.html");
rd.forward(request, response);
return;
}
}
}
Login.java
package com.logexample.model;
public class LogIn {
private String username;
private String password;
public LogIn(String username, String password) {
super();
this.username = username;
this.password = password;
}
public LogIn() {
super();
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
success.html
<html> <head> <title>Home</title> </head> <body> <center><br/><br/> <h2>Welcome to home page.</h2> </center> </body> </html>
Download: UserAuditExample
