JavaBeans in JSP

A JavaBean is just a class with getX()/setX() methods defined for its member variables (AKA properties).
To embed a bean use <jsp:useBean>, as shown below (assume this page is GET'ed with "..?name=Jeff").

<%@ page import="HelloBean" %>

<jsp:useBean id="hello" class="HelloBean">
  <jsp:setProperty name="hello" property="name" param="name"/>
</jsp:useBean>

<HTML>
<HEAD><TITLE>Hello</TITLE></HEAD>
<BODY>
<H1>
Hello, <jsp:getProperty name="hello" property="name" />

</H1>
</BODY>
</HTML>

with the bean defined as

public class HelloBean {
  private String name = "World";

  public void setName(String name) {
    this.name = name;
  }

  public String getName() {
    return name;
  }
}

Confusingly, the bean name is given by id in the useBean but by name in the get/setProperty.
You could also use <.. property="propertyname" param="paramName"> to set propertyname to some param's value
or <.. property="propertyname" value="constant"> to set it to a constant.