从字符串创建Velocity模板的最佳方法是什么?
What is the best way to create Velocity Template from a String?
我知道可以通过String或StringReader传递的 Velocity.evaluate 方法,但是我有个更好的办法(例如,创建Template实例的任何优势)).
I'm aware of Velocity.evaluate method where I can pass String or StringReader, but I'm curios is there a better way to do it (e.g. any advantage of creating an instance of Template).
推荐答案有一些开销分析模板.如果您的模板很大并且反复使用它,则可以通过预先准备该模板来获得一些性能提升.你可以做这样的事情,
There is some overhead parsing template. You might see some performance gain by pre-parsing the template if your template is large and you use it repeatedly. You can do something like this,
RuntimeServices runtimeServices = RuntimeSingleton.getRuntimeServices(); StringReader reader = new StringReader(bufferForYourTemplate); Template template = new Template(); template.setRuntimeServices(runtimeServices); /* * The following line works for Velocity version up to 1.7 * For version 2, replace "Template name" with the variable, template */ template.setData(runtimeServices.parse(reader, "Template name"))); template.initDocument();然后,您可以一遍又一遍地调用 template.merge(),而无需每次都对其进行解析.
Then you can call template.merge() over and over again without parsing it everytime.
顺便说一句,您可以将String直接传递给 Velocity.evaluate().
BTW, you can pass String directly to Velocity.evaluate().
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