Using the <jsp:setProperty> Action
One
way to set a bean property value is using the standard action:
<jsp:setProperty>
.
Table 6-2 shows a bean that is similar to the
CartoonBean
used in the previous example, but it
also has a writable property named category
.
Property name |
Java type |
Access |
Description |
category |
String |
Write |
The message category, either |
message |
String |
Read |
The current message in the selected category |
Instead of image files, the MixedMessageBean
has a
property that contains a funny message (funny to me at least—I
hope you agree). The bean maintains messages of different types, and
the write-only category
property is used to select
the type you want. Example 6-3 shows how you can use
this feature.
<html> <head> <title>Messages of the Day</title> </head> <body bgcolor="white"> <h1>Messages of the Day</h1> <jsp:useBean id="msg" class="com.ora.jsp.beans.motd.MixedMessageBean" /> <h2>Deep Thoughts - by Jack Handey</h2> <jsp:setProperty name="msg" property="category" value="thoughts" /> <i> <jsp:getProperty name="msg" property="message" /> </i> <h2>Quotes From the Famous and the Unknown</h2> <jsp:setProperty name="msg" property="category" value="quotes" /> <i> <jsp:getProperty name="msg" property="message" /> </i> </body> </html>
As in the previous example, the
<jsp:useBean>
action creates an instance of
the MixedMessageBean ...
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