Home/ Questions/Q 6834241
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-26T23:05:14+00:00

I am beginner at using JSP and am following a tutorial. I have a

  • 0

I am beginner at using JSP and am following a tutorial. I have a basic question. There is a simple class named NameHandler that has only one String field called name.

index.jsp looks like this:

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>JSP Page</title>
    </head>
    <body>
        <h1>Entry Form</h1>
        <form name="Name Input Form" action="response.jsp">
            Enter name
            <input type="text" name="name"/>        
            <input type="submit" value="OK"  />
        </form>

    </body>
</html>

and response.jsp looks like this:

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>JSP Page</title>
    </head>
    <body><jsp:useBean id="mybean" scope="session" class="org.mypackage.hello.NameHandler" />
        <jsp:setProperty name= "mybean" property= "name"/> 
        <h1>Hello, <jsp:getProperty name="mybean" property="name" />!</h1>
    </body>
</html>

My question is this: I tried to understand how this sets the name member in NameHandler class when the user enters a string. here what does name =”name” mean? I tried to understand how this sets the name member of the class. The code works correctly, so where and how does this set the name member of the class?

I also know that I can use the name of the bean and call a class function like <%=beanname.classfunction %>. So which one is better? First way or second way? What are the differences.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    The tag <jsp:setProperty name= "mybean" property= "name"/> works as the following. First it finds bean named mybean. The it takes value of property attribute (name in your case), capitalizes it and prepends set, and constructs method name:

    String methodName = "get" + str.substring(0, 1).toUpperCase() + str.toLowerCase(str).

    Then it calls getMethod(methodName)

    If this call succeeds it calls it using method.invoke()

    • 0