is there any way to use a JavaBean from a Servlet like JSP dose ? I mean, in a JSP you can use: <jsp:setProperty name="language" property="*"/> to set all properties of a form. Is there a way to do this in a Servlet ? A JSP is really a servlet, (thats what I hear about), the code that tomcat generates (from a JSP) is something like this: //Just creates the bean, I am not sure wath dose "Beans.instantiate" //differs from just "new League()" if my bean //just have setter and getter functions league = (sports.SportActivities.League) java.beans.Beans.instantiate(this.getClass().getClassLoader(), "sports.SportActivities.League"); pageContext.setAttribute("league", league, PageContext.REQUEST_SCOPE); //I guess here is where it asign all properties. //Maybe it use some of java.lang.reflect, maybe not (just an idea). JspRuntimeLibrary.introspect(pageContext.findAttribute("league"), request); My question, (again) Is there a way to do this in a Servlet or I have to use the JspRuntimeLibrary ?
is there any way to use a JavaBean from a Servlet like JSP dose ? Yes. I mean, in a JSP you can use: <jsp:setProperty name="language" property="*"/> to set all properties of a form. Is there a way to do this in a Servlet ?
Doing this is like setting all the properties of the bean in a single action. This scriptlet does the same:
and Yes, this is called introspection.
Introspection, the process by which a builder tool analyzes how a Bean works, differentiates Beans from typical Java classes. Because Beans are coded with predefined patterns for their method signatures and class definitions, tools that recognize these patterns can "look inside" a Bean and determine its properties and behavior. Builder environments, and some runtime situations need to identify the properties, events, and methods that a bean supports. This process is called introspection.
so you're capable of doing this because your form elemnts (for example) match *exactly* with your bean properties. you also might want to look at this site, it explains how to use it. hope this helps [ August 26, 2003: Message edited by: Andres Gonzalez ]
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