Brittle Things: JSP

Showing posts with label JSP. Show all posts

Thursday, 6 December 2012

Login page using JSP

JSP simple log in page

jsp code that implement the business logic

<HTML>
    <HEAD>
        <TITLE>
            Welcome..
        </TITLE>
        <%@page language="java" contentType="text/html"%>
    </HEAD>
    <BODY><center><h2>
        <% if((request.getParameter("name").equals("sscollege"))&&(request.getParameter("pass").equals("college")))
            {
                out.println("Login successfully...");
             }
            else
            {
                out.println("Invalid username or password");
             }
        %>
        </h2>

Read Complete

JSP custom tag with body

Custom tag JSP

Steps for creating custom tag get from here

code for creating jsp custom tag with body

Tag implementation

TagBody.java

package st;

import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import java.io.*;

public class TagBody extends TagSupport
{

     public int doStartTag() throws JspException
     {
        try{
               JspWriter out = pageContext.getOut();
               out.println( "<table border=1>");

                      out.println("<tr><td> ");


            }
        catch(Exception ex)
        {
        }
        return EVAL_BODY_INCLUDE;
     }

    public int doEndTag() throws JspException

Read Complete

Custom tag using JSP without body

JSP custom tag without body

steps

first create a folder named as st in WEB-INF\classes directory

Then create java file named as HellTag.java inside st

paste the following on HellTag.java file

package st;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import java.io.*;

public class HellTag extends TagSupport
{
    public int doStartTag()
    {
        try{
            JspWriter js=pageContext.getOut();
            js.print("Hello");
        }
        catch(Exception ex)
        {
            System.out.println(ex.getMessage());
        }
        return SKIP_BODY;
    }
}

compile the HelloTag.java file by following manner
javac HellTag.java -classpath "C:\Program Files\Apache Software Foundation\Tomcat 6.0\lib\jsp-api.jar"

Then create st.tld file inside the WEB-INF directory

Read Complete

Friday, 16 November 2012

Error page in JSP

Implementation of ERROR page in JSP

errorpage.jsp

<%@ page isErrorPage="true"%>
<%@ page import="java.io.*"%>
<html>
     <head>
             <title>Custom Error Page</title>
     </head>
    <body>
        <h2>Your application has generated an error</h2>
           <h3>Please check for the error given below</h3>
           <b>Exception:</b><br>
           <font color="red"><%= exception.toString()%></font>
</body>
</html>

errorexample.jsp

<HTML>
    <HEAD>
        <TITLE>
            Login
        </TITLE>
        <%@ page language="java" contentType="text/html" %>
        <%@page errorPage="errorpage.jsp"%>

    </HEAD>
    <BODY>
        <FORM METHODE="post" ACTION="errorexample.jsp">
        <CENTER>
        <TABLE>
            <TR>
                <TD>Number1</TD>
                <TD><input type="text" name="n1" id="n1"></TD>
            </TR>
            <TR>
                <TD>Number2</TD>
                <TD><input type="text" name="n2" id="n2"></TD>
            </TR>
            <TR>
                <TD>Result</TD>
                <TD><input type="text" name="n3" id="n3" value="<%
                String num1=request.getParameter("n1");
                String num2=request.getParameter("n2");

                if((num1!=null)&&(num2!=null))
                {
                int nu1=Integer.parseInt(num1);
                int nu2=Integer.parseInt(num2);

                out.println(nu1/nu2);
                }
                    %>">

                </TD>
            </TR>
            <TR>
                <TD></TD>
                <TD><input type="submit" value="Divide"></TD>
            </TR>
        </TABLE>
        </FORM>
    </BODY>
</HTML>

OUTPUT

Jsp program to divide a number

JSP error page

Display Date and Time Using JSP

JSP Program to display current date and time

<HTML>
    <HEAD>
        <TITLE>
            Date
        </TITLE>
        <%@page import="java.util.*;" %>
    </HEAD>
    <BODY>
        <P>
        <h1><CENTER>Welcome..</BR>
            Todays Date is
        </br>
        <%=new Date()%>
        </h1>
        </P>
    </BODY>
</HTML>

output:

Date and Time using JSP

Pages

Thursday, 6 December 2012

Login page using JSP

JSP simple log in page

jsp code that implement the business logic

JSP custom tag with body

Custom tag JSP

Tag implementation

Custom tag using JSP without body

JSP custom tag without body

steps

Friday, 16 November 2012

Error page in JSP

Implementation of ERROR page in JSP

errorpage.jsp

errorexample.jsp

OUTPUT

Display Date and Time Using JSP

JSP Program to display current date and time

output: