Re: accessing java bean's property
On 3/12/2010 6:02 AM, angelochen960@gmail.com wrote:
Hi,
I have this bean:
public class Item {
private String type;
private Boolean pub;
This should probably be a "boolean", not a Boolean.
public String getType() { return type;}
public Boolean isPub() { return pub;}
Same as above. Boolean is an object reference type, which may end up
being null. Most of the time, you don't want a null for a boolean
value. This is true of most of the primitive types.
}
I can use item.getType() to get the type value, but I'm looking for a
generic way, say I have a string 'Type', then I'd like to get the
value of type of a certain object, any idea how to achieve this?
Thanks.
A.C.
Actually, it would be if you had the string "type", because that is the
name of the property. You can use introspection, or use a third-party
library (which uses reflection/introspection).
Spring has some good classes for this.
I often prefer OGNL for an embedded expression language.
So, the Big Question is, what are you *really* trying to do? If you
have to ask about reflection, then you are hopefully not working on a
production system. Reflection is useful for framework-type development,
but developing a useful and maintainable framework requires experience.
If you're playing around with reflection for fun and/or homework, then
have at it.
--
Daniel Pitts' Tech Blog: <http://virtualinfinity.net/wordpress/>