Calling a function in a class from a web form

**szahn** · 03-03-2006 12:07 AM

I have a form with a text box and submit button. I have written a java class that takes a string and appends it to a text file. What I want to do it combine these and have a form which action is to call the function in the java class and pass it whatever is in the text box. Below is a simple sketch of what I'm trying to do.

<Form>
Username
Post Action --> UserLog.addUser(Username)
</Form>

UserLog.java
function addUser(String Username)) //Append the username to a file

How do I tell the form to do whatever is in the java class? I'm very new so a simple and easy answer is appreciated. Thank you.

**arul** · 03-08-2006 01:52 AM

Username.jsp

Code:

HTML>

<BODY>
<FORM METHOD=POST ACTION="Username.jsp">
<INPUT TYPE=TEXT NAME=user SIZE=20>
<P><INPUT TYPE=SUBMIT></P>

<jsp:useBean id="userLog" class="com.UserLog" scope="request"/>


<% 
    String name = request.getParameter("user");

    if(name != null && name.length() > 0) {
    	userLog.addUser(name);
    }   
%>

</FORM>
</BODY>
</HTML>

com.UserLog.java

Code:

package com;

public class UserLog {

   
    public UserLog() {}
    
    public void addUser(String username) {
        System.out.println(username);
        //add the logic to append the username
    }
}

Build a war file which should have

UserLog.class --> WEB-INF\classes\com folder
Usename.jsp --> (doc-root)

The additional files may be required depending on what server you are deploying to

<app-server>.xml --> WEB-INF

For example I used JBOSS server to test and had to have

jboss-web.xml --> WEB-INF folder

Code:

<?xml version="1.0" encoding="UTF-8"?>
<jboss-web
	<context-root>test</context-root>
</jboss-web>

to test: typed the url http://localhost:8080/test/Username.jsp

Hope it helps.

**szahn** · 03-14-2006 04:20 PM

Thanks, this is great help. Will this work without IIS on a standard regular server?

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