JSP Expression Language Function Example

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package com.cv.jsp.el.function;



import java.util.Random;

/**

 * class DiceRoller

 * 

 *  @author Chandra Vardhan

 *  

 */

public class DiceRoller {

    public static int rollDice() {

        return new Random().nextInt(6) + 1;  

    }

}





<!DOCTYPE html>

<html>

<head>

<meta charset="ISO-8859-1">

<title>Insert title here</title>

</head>

<body>

	<br>

	<br>

	<a href="TestServlet">Click here to get response...</a>

</body>

</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=US-ASCII">

<title>Login Form</title>


<style type="text/css">

</style>

</head>


<body>

	<br>

	<br>

	<div align="center">

		<form action="ServletCookieImpl" method="post" id='test'>

			<fieldset>

				<legend>Wow... Sorry... Plz enter login credentials

					again...</legend>


				<table align="center">

					<tr>

						<td><label>Enter Name : </label></td><td><input type="text"

							name="name" /></td>

					</tr>

					<tr>

						<td><label>Enter Employee Id : </label></td><td><input type="text"

							name="empId" /></td>

					</tr>

					<tr>

						<td align="right"><input type="submit" value="Submit" /></td>

					</tr>

				</table>

			</fieldset>

		</form>

	</div>

</body>

</html>





<%@ page language="java" import="com.cv.jsp.el.function.*"

	contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>

<%@ taglib prefix="dice" uri="DiceFunctions" %> 

<!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>Example of getting init param</title>

</head>

<body>
	

	<fieldset>

		<legend>Result page...</legend>

		

		<table align="center">

			<tr>

				<td><label>I am from dice roll : : </label></td><td><font color="RED">${dice:rollIt()}</font></td></tr>

			</tr>


		</table>

	</fieldset>

</body>

</html>



















#By default enabling Console appender

# Root logger option

log4j.rootLogger=INFO, stdout



# Redirect log messages to console

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=%-5p [%c]:%L -->> %m%n



# Redirect log messages to a log file

#log4j.appender.file=org.apache.log4j.RollingFileAppender

#log4j.appender.file.File=C:\\servlet-application.log

#log4j.appender.file.MaxFileSize=5MB

#log4j.appender.file.MaxBackupIndex=10

#log4j.appender.file.layout=org.apache.log4j.PatternLayout

#log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n















	
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.cv.servlet.filter.response</groupId>
  <artifactId>JSPExpressionLanguageFunctionProject</artifactId>
  <version>1.0</version>
  <packaging>war</packaging>
   <properties>
		<log4j-version>1.2.16</log4j-version>
		<java-version>1.8</java-version>
	</properties>

	<build>
		<plugins>
			<plugin>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.3</version>
				<configuration>
					<source>${java.version}</source>
					<target>${java.version}</target>
				</configuration>
			</plugin>
			<plugin>
				<artifactId>maven-war-plugin</artifactId>
				<version>2.6</version>
				<configuration>
					<warSourceDirectory>WebContent</warSourceDirectory>
					<failOnMissingWebXml>false</failOnMissingWebXml>
				</configuration>
			</plugin>
		</plugins>
	</build>
	<dependencies>
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>servlet-api</artifactId>
			<version>3.0-alpha-1</version>
		</dependency>
		<dependency>
			<groupId>commons-fileupload</groupId>
			<artifactId>commons-fileupload</artifactId>
			<version>1.3.1</version>
		</dependency>
		<dependency>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
			<version>${log4j.version}</version>
		</dependency>
	</dependencies>
</project>








 
<?xml version="1.0" encoding="UTF-8"?> 
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
  xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee  http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"   version="3.1">
	<display-name>Test Servlet</display-name>

	<welcome-file-list>
		<welcome-file>result.jsp</welcome-file>
	</welcome-file-list>

</web-app>













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