MACROMEDIA COLDFUSION 4.5-CFML LANGUAGE Manual do Utilizador descarregar pdf (Página 14)

14 CHAPTER 30 Extending ColdFusion with CFX

3. For the Tag Name ﬁeld, enter the name of the tag, including the CFX_ part but without

the angle brackets (for this example, you will enter

CFX_HelloWorld). The names of CFX

tags are not case sensitive, so you don’t need to get the capitalization exactly right. That

said, it makes sense to use the same capitalization that you plan to use in your

ColdFusion code.

4. For the Class Name ﬁeld, enter the name of the class ﬁle, but without the .class

extension. This part is case sensitive, so the capitalization you use here must match the

capitalization of the class ﬁle (which, in turn, always matches the name of the class as

speciﬁed in the Java code itself).

5. If you wish, enter a Description for the tag. The description comes in handy during

development if several people on your team are creating different CFX tags.

6. Click the submit button to register the tag. The tag will now appear in the Registered

CFX Tags list, indicating that it is ready for use in your ColdFusion pages.

Using the New Tag

Now that the <CFX_HelloWorld> tag has been written, compiled, and registered in the ColdFusion

Administrator, it’s ready to be used in your pages. Listing 30.2 shows the code for the simple test

page shown previously in Figure 30.1.

Listing 30.2 HelloWorldDemo.cfm—Using the <CFX_HelloWorld> Ta g

<!---

Filename: HelloWorldDemo.cfm

Author: Nate Weiss (NMW)

Purpose: Demonstrates how to use a CFX tag in a ColdFusion page

--->

<html>

<head>

<title>Using <CFX_HelloWorld></title>

</head>

<body>

<CFX_HelloWorld

NAME=”Belinda”

AGE=”19”>

</body>

</html>

A Word on Exceptions

It’s worth noting that the exceptions created by the throw statement in Listing 30.1 become true

ColdFusion exceptions that behave just like exceptions thrown by native CFML tags, or by the

<cfthrow> tag. The look and feel of the error messages can be customized with the <cferror> tag.

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