Velocity无法找到资源 [英] Velocity can't find resource

问题描述

出了点问题，非常令人沮丧。我在velocity的主页上读到，当我运行webapp时，应该设置一些属性。我已经做到了，但无论我做什么，我都会遇到同样的错误。

这是我设置道具和使用速度的地方

Something is wrong and it is very frustrating. I read on velocity's homepage that when I run a webapp then some properties should be set. And I've done that but no matter what I do I keep getting the same error.
This is where I set the props and use velocity

public class ConfirmationMailGenerator implements MailGenerator {

    private BasicUser user;
    private String htmlTemplate = "HTMLConfirmationMailTemplate.vsl";
    private String plainTemplate = "PlainConfirmationMailTemplate.vsl";

    public ConfirmationMailGenerator(BasicUser user) {
        this.user = user;
    }

    public StringWriter generateHTML() throws Exception {
        Properties props = new Properties();
        props.setProperty("resource.loader", "wepapp");
        props.setProperty("webapp.resource.loader.class", "org.apache.velocity.tools.view.WebappResourceLoader");
        props.setProperty("webapp.resource.loader.path", "/WEB-INF/mailtemplates/");
        VelocityEngine engine = new VelocityEngine(props);
        VelocityContext context = new VelocityContext();

        engine.init();

        Map map = createDataModel();
        context.put("user", map);

        Template template = engine.getTemplate(htmlTemplate);
        StringWriter writer = new StringWriter();
        template.merge(context, writer);

        return writer;
    }
...
}

文件是课程保存在/ WEB-INF / mailtemplates /中。

如果我使用这个，我会收到此错误：

The files is of course saved in /WEB-INF/mailtemplates/.
If I use this I get this error:

SEVERE: ResourceManager : unable to find resource 'HTMLConfirmationMailTemplate.vsl' in any resource loader.
SEVERE: The log message is null.

感谢您的时间：）

推荐答案

您正在使用Webapp资源加载器，该资源加载器适用于Velocity Tools servlet提供的页面。 （它需要一些特殊的初始化来查找servlet上下文的根目录。）

You are using the Webapp resourceloader, which is intended for pages served by the Velocity Tools servlet. (It requires some special initialization to find the root of the servlet context).

我建议你使用ClasspathResourceLoader，然后将文件放入WEB-INF / classes，或者你的类路径中的其他地方。这实际上是最直接的方法。

I recommend you use the ClasspathResourceLoader, then put the files into WEB-INF/classes, or elsewhere in your classpath. This is really the most straight forward approach.

resource.loader = class
class.resource.loader.class = org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader

更多信息在这里：

https://velocity.apache.org/engine/1.7/apidocs/org/apache/velocity/runtime/resource/loader/ClasspathResourceLoader.html

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