在tomcat下部署Velocity模板

velocity-1.5.jar(382.9 K)

velocity-dep-1.5.jar(682.2 K)
 
切换到幻灯片模式

首先创建一个vtl项目，在项目下生成一个servlet

testVtl.java:

package com.cl.vtl;
import java.io.IOException;
import java.util.Properties;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.Velocity;
import java.io.BufferedWriter;
import java.io.OutputStreamWriter;
/**
* @version 1.0
* @author
*/
public class testVtl extends HttpServlet {

/**
* @see javax.servlet.http.HttpServlet#void (javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
*/


public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try{

Properties props = new Properties();
                props.setProperty(Velocity.INPUT_ENCODING, "GBK");
                props.setProperty(Velocity.OUTPUT_ENCODING, "GBK");
                props.setProperty(Velocity.RESOURCE_LOADER, "file");
                props.setProperty("file.resource.loader.description",
                        " Velocity File Resource Loader");
                props.setProperty("file.resource.loader.class",
                        "org.apache.velocity.runtime.resource.loader.FileResourceLoader");
                props.setProperty("file.resource.loader.path", "D:/Program Files/Apache Software Foundation/Tomcat 5.0/webapps/vtl");
                props.setProperty("file.resource.loader.cache", "true");
                props.setProperty("file.resource.loader.modificationCheckInterval", "1");
                props.setProperty("directive.foreach.counter.name", "velocityCount");
                props.setProperty("directive.foreach.counter.initial.value", "1");
Velocity.init(props);//初始化模板设置
//Velocity.init("velocity.properties");
Template template = Velocity.getTemplate("/tm/index.vm", "GBK");//调用模板文件

VelocityContext context = new VelocityContext();//建立上下文链接
            context.put("s", new String [] { "redwood", "maple", "oak", "pine" });
           
            BufferedWriter writer = writer = new BufferedWriter(new OutputStreamWriter(response.getOutputStream(),"GBK"));
            if ( context != null)
                template.merge(context, writer);//输出
            writer.flush();
            writer.close();
           }catch(Exception ex){ex.printStackTrace();}

}

/**
* @see javax.servlet.http.HttpServlet#void (javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
*/
public void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException{
this.doGet(req,resp) ;

}

}



web.xml:

<?xml version="1.0" encoding="ISO-8859-1"?>

<!DOCTYPE web-app
    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
    "http://java.sun.com/dtd/web-app_2_3.dtd">

<web-app>
  <display-name>Welcome to Tomcat</display-name>
  <description>
     Welcome to Tomcat
  </description>


<!-- JSPC servlet mappings start -->

    <servlet>
        <servlet-name>org.apache.jsp.index_jsp</servlet-name>
        <servlet-class>org.apache.jsp.index_jsp</servlet-class>
    </servlet>

    <servlet-mapping>
        <servlet-name>org.apache.jsp.index_jsp</servlet-name>
        <url-pattern>/index.jsp</url-pattern>
    </servlet-mapping>

  <servlet>
        <servlet-name>testVtl</servlet-name>
        <servlet-class>com.cl.vtl.testVtl</servlet-class>
    </servlet>

    <servlet-mapping>
        <servlet-name>testVtl</servlet-name>
        <url-pattern>/index</url-pattern>
    </servlet-mapping>
<!-- JSPC servlet mappings end -->

</web-app>



/*在D:/Program Files/Apache Software Foundation/Tomcat 5.0/webapps/vtl下建立tm文件夹
tm文件夹下存放模板文件*/
建立模板文件index.vm
index.vm:1234567 <table border=1>
#foreach($n in $s)
<tr><td>
     $n is a big tree!
</td></tr>
#end
</table>