Velocity中加载vm文件的三种方式【转】

Velocity中加载vm文件的三种方式(也可以参考demo文件夹下的例子对照)
Velocity中加载vm文件的三种方式： 

方式一：加载classpath目录下的vm文件 

Properties p = new Properties(); 

p.put("file.resource.loader.class", 

"org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader"); 

Velocity.init(p); 

... 

Velocity.getTemplate(templateFile); 

方式二：根据绝对路径加载，vm文件置于硬盘某分区中，如：d:\\tree.vm 

Properties p = new Properties(); 

p.setProperty(VelocityEngine.FILE_RESOURCE_LOADER_PATH, "d:\\"); 

Velocity.init(p); 

... 

Velocity.getTemplate("tree.vm"); 


方式三：使用文本文件，如：velocity.properties，配置如下： 

input.encoding = UTF-8 

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

再利用如下方式进行加载 

Properties p = new Properties(); 

p.load(this.getClass().getResourceAsStream("/velocity.properties")); 

Velocity.init(p); 

... 
Velocity.getTemplate(templateFile); 

方法四: org.apache.velocity.runtime.resource.loader.URLResourceLoader

 

 

 

 

 

2.加载远程文件的问题

解决方案1.

http://mail-archives.apache.org/mod_mbox/velocity-user/200211.mbox/[e-mail]%3E<!--[if !supportNestedAnchors]--><!--[endif]-->

解决方案2

http://badqiu.javaeye.com/blog/691617

http://code.google.com/p/rapid-framework/source/browse/trunk/rapid-framework/src/rapid_framework_common/cn/org/rapid_framework/web/httpinclude/HttpInclude.java

 

public class ApplicationContext extends AbstractInterceptor{

private static final long serialVersionUID = 5728757263270691902L;

private static Logger log = Logger.getLogger(ApplicationContext.class);

@Override

public String intercept(ActionInvocation ai) throws Exception {

       log.info("Oh,yeah. I'm intercepting.");

       try{

              Map<String, Object> application = ai.getInvocationContext().getApplication();

              Object ac = application.get("ac");

              Object httpInclude = application.get("httpInclude");

              log.info(application.get("httpInclude"));

              if(null==ac && null!=application)

                     application.put("ac", new AgencyConstants());

              if(null==httpInclude&&null!=application)

                     application.put("httpInclude",new-HttpInclude(ServletActionContext.getRequest(), ServletActionContext.getResponse()));

              if(null==application)

                     return Action.ERROR;

              return ai.invoke();

       }catch(Exception e){

              log.error(e.getLocalizedMessage());

              e.printStackTrace();

              return Action.ERROR;

       }

}

}

 

 

参考:

http://velocity.apache.org/engine/releases/velocity-1.5/developer-guide.html

http://hailinhe1986-163-com.javaeye.com/blog/657211

 

 

Other Demo

http://www.javaranch.com/journal/2004/03/Velocity-AnIntroduction.html

http://www.suneca.com/article.asp?id=22