一个关于Velocity的例子

ddh9504 · 发表于 2013-2-3 11:16:49

自己做的一个关于velocity的例子。

index.vm
---------------------------------
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>Velocity Demo</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <meta name="keywords" content="velocity,模板">
</head>
    <body >
        #set($name1="first!")
        Hello, $name1 <br>
        Hello, $name2
        <br/>
        Hello, $name3
         <br/>
        Hello, $name3
        <hr>

        <table border='1' width='200' >
        <tr>
        <td>
         yy
        </td>
        </tr>
        #foreach ($iii in $theList)
        <tr>
          <td bgcolor="#eeeeee">$iii</td>
        </tr>
        #end
        </table>
    </body>
</html>

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MyVelocityServlet.java
-----------------------------------------------------------------------
package com.velocity;
import java.io.IOException;
import java.io.FileNotFoundException;
import java.io.StringWriter;
import java.io.UnsupportedEncodingException;
import java.util.Properties;
import java.util.Vector;
import javax.servlet.ServletConfig;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.velocity.Template;
import org.apache.velocity.context.Context;
import org.apache.velocity.servlet.VelocityServlet;
import org.apache.velocity.app.Velocity;
import org.apache.velocity.app.VelocityEngine;
import org.apache.velocity.VelocityContext;
@SuppressWarnings("deprecation")
public class MyVelocityServlet extends VelocityServlet {
    protected Properties loadConfiguration(ServletConfig config)
            throws IOException, FileNotFoundException {
        VelocityEngine engine = new VelocityEngine();
        Properties p = new Properties();
        String path = config.getServletContext().getRealPath("/");
        if (path == null) {
            path = "/";
        }
        p.setProperty(Velocity.FILE_RESOURCE_LOADER_PATH, path);
        p.setProperty("runtime.log", path + "velocity.log");

        try {
            engine.init(p); // 载入模板的路径path ,即上下文路径
        } catch (Exception e) {
            e.printStackTrace();
        }
        return p;
    }
    public Template handleRequest(HttpServletRequest request,
            HttpServletResponse response, Context ctx) {

    try {
   request.setCharacterEncoding("UTF8");
  } catch (UnsupportedEncodingException e1) {

   e1.printStackTrace();
  }

    response.setCharacterEncoding("UTF8");
        Template template = null;
        Template template2 = null;
        try {
            /**
             * 主要代码
             */
            Velocity.init();

           // VelocityContext context = new VelocityContext();
            String p1 = "JAVA";
            String p2 = "C++";
            String p3 = "Ruby";
            String p4 = "D";
            Vector<string></string> personList = new Vector<string></string>();
            personList.addElement(p1);
            personList.addElement(p2);
            personList.addElement(p3);
            personList.addElement(p4);
            /**
             * 将模板数据name, list 放置到上下文环境 context 中去
             */
            ctx.put("name2", " 这里是在后台赋值! ");
            ctx.put("name3", " 小齐! ");
            ctx.put("theList", personList);
            template = Velocity.getTemplate("/index.vm");
        } catch (Exception e) {
            e.printStackTrace();
        }

        // 以下一段代码主要是获得模板的HTML内容在后台显示
        try {
            template2 = Velocity.getTemplate("/index.vm");
            VelocityContext context = new VelocityContext();
            context.put("name2", "这里在后台第二次赋值！");
            StringWriter writer = new StringWriter();
            template2.merge(context, writer);
            System.out.println(writer.toString());
        } catch (Exception e) {
            e.printStackTrace();
        }
        return template;
    }
}

***********************************
本例子是参照网上搜集的资料而形成的，现提出来供大家参考，谢谢

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