找不到速度模板资源

2022-08-31 16:16:43

只是一个基于maven结构的简单速度独立应用程序。以下是用 Scala 编写的代码片段,用于在文件夹中呈现模板:helloworld.vm${basedir}/src/main/resources

com.ggd543.velocitydemo

import org.apache.velocity.app.VelocityEngine
import org.apache.velocity.VelocityContext
import java.io.StringWriter

/**
 * @author ${user.name}
 */
object App {

  def main(args: Array[String]) {
    //First , get and initialize an engine
    val ve = new VelocityEngine();
    ve.init();

    //Second, get the template
    val resUrl = getClass.getResource("/helloworld.vm")
    val t = ve.getTemplate("helloworld.vm");   // not work 
//    val t = ve.getTemplate("/helloworld.vm");  // not work
//    val t = ve.getTemplate(resUrl.toString);  // not work yet
    //Third, create a context and add data
    val context = new VelocityContext();
    context.put("name", "Archer")
    context.put("site", "http://www.baidu.com")
    //Finally , render the template into a StringWriter
    val sw = new StringWriter
    t.merge(context, sw)
    println(sw.toString);
  }

}

当编译并运行程序时,我得到以下错误:

2012-1-29 14:03:59 org.apache.velocity.runtime.log.JdkLogChute log
严重: ResourceManager : unable to find resource '/helloworld.vm' in any resource loader.
Exception in thread "main" org.apache.velocity.exception.ResourceNotFoundException: Unable to find resource '/helloworld.vm'
    at org.apache.velocity.runtime.resource.ResourceManagerImpl.loadResource(ResourceManagerImpl.java:474)
    at org.apache.velocity.runtime.resource.ResourceManagerImpl.getResource(ResourceManagerImpl.java:352)
    at org.apache.velocity.runtime.RuntimeInstance.getTemplate(RuntimeInstance.java:1533)
    at org.apache.velocity.runtime.RuntimeInstance.getTemplate(RuntimeInstance.java:1514)
    at org.apache.velocity.app.VelocityEngine.getTemplate(VelocityEngine.java:373)
    at com.ggd543.velocitydemo.App$.main(App.scala:20)
    at com.ggd543.velocitydemo.App.main(App.scala)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)

Process finished with exit code 1

答案 1

好问题 - 我今天使用Ecilpse解决了我的问题,如下所示:

  1. 将模板放在与源代码相同的文件夹层次结构中(即使将其包含在生成路径中,也不在单独的文件夹层次结构中),如下所示:Where to put your template file

  2. 在代码中,只需使用以下代码行(假设您只想将日期作为数据传递):

    VelocityEngine ve = new VelocityEngine();
    ve.setProperty(RuntimeConstants.RESOURCE_LOADER, "classpath");
    ve.setProperty("classpath.resource.loader.class", ClasspathResourceLoader.class.getName());
    ve.init();
    VelocityContext context = new VelocityContext();
    context.put("date", getMyTimestampFunction());
    Template t = ve.getTemplate( "templates/email_html_new.vm" );
    StringWriter writer = new StringWriter();
    t.merge( context, writer );
    

看看我们首先告诉VelocityEngine在类路径中查看。没有这个,它就不知道该去哪里找。


答案 2

我把我的.vm放在,那么代码是:src/main/resources/templates

Properties p = new Properties();
p.setProperty("resource.loader", "class");
p.setProperty("class.resource.loader.class", "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
Velocity.init( p );       
VelocityContext context = new VelocityContext();           
Template template = Velocity.getTemplate("templates/my.vm");

这适用于Web项目。

在eclipse Velocity.getTemplate(“my.vm”)中工作,因为速度将在src/main/resources/或src/main/resources/templates中查找.vm文件,但在Web项目中,我们必须使用Velocity.getTemplate(“templates/my.vm”);


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