如何为Apache Velocity创建自定义指令 [英] How do I create a custom directive for Apache Velocity

问题描述

我使用Apache的Velocity模板引擎，我想创建一个自定义的指令。也就是说，我想要写#doMyThing（），并且调用一些我写的java代码来生成文本。

I am using Apache's Velocity templating engine, and I would like to create a custom Directive. That is, I want to be able to write "#doMyThing()" and have it invoke some java code I wrote in order to generate the text.

我知道我可以通过添加一行来注册一个自定义的指令

I know that I can register a custom directive by adding a line

userdirective=my.package.here.MyDirectiveName

到我的velocity.properties文件。而且我知道我可以通过扩展指令类。我不知道的是如何扩展Directive类 - 一些新的指令的作者的文档。例如，我想知道我的getType（）方法是否返回BLOCK或LINE，我想知道我的setLocation（）方法应该怎么做？

to my velocity.properties file. And I know that I can write such a class by extending the Directive class. What I don't know is how to extend the Directive class -- some sort of documentation for the author of a new Directive. For instance I'd like to know if my getType() method return "BLOCK" or "LINE" and I'd like to know what should my setLocation() method should do?

有没有任何文件比使用来源，Luke ？

推荐答案

我整理了一点文章。也许有人会觉得有用。

I put together a little article about writing custom velocity directives (and tools). Maybe someone will find it useful.

这篇关于如何为Apache Velocity创建自定义指令的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！