velocity生成静态页面代码

首先需要两个必备的jar包：

velocity.jar   velocity-tool-view.jar

web.xml

  <!-- load velocity property -->
  <servlet>
       <servlet-name>velocity</servlet-name>
       <servlet-class>org.apache.velocity.tools.view.servlet.VelocityLayoutServlet</servlet-class>
       <init-param>
           <param-name>org.apache.velocity.properties</param-name>
           <param-value>/WEB-INF/velocity.properties</param-value>
       </init-param>
  </servlet>
  <servlet-mapping>
      <servlet-name>velocity</servlet-name>
      <url-pattern>*.vm</url-pattern>
  </servlet-mapping>

velocity.properties

input.encoding=utf-8
output.encoding=utf-8

WebRoot.resource.loader.class = org.apache.velocity.tools.view.servlet.WebappLoader
webapp.resource.loader.path=/WEB-INF/vm/

后台调用：

　　　　　　String realpath = request.getRealPath("/");

            //模板路径
            String urlVm = "/WEB-INF/vm/test.vm"; 

            //生成的html的路径，在webroot的html文件夹下面
            String urlHtml = realpath+"/html/test.htm";

            //设置模板中的元素
            VelocityContext  context = new VelocityContext();
            context.put("title", "hello word ");

            CreateHtml.createHtml(realpath,urlVm,urlHtml,context);    

CreateHtml.java

package com.velocity;

import java.io.PrintWriter;
import java.util.Properties;

import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.Velocity;

public class CreateHtml {
    public static void createHtml(String realpath, String urlVm,
            String urlHtml, VelocityContext context) {

        //加载路径
        Properties  prop = new Properties();
        prop.setProperty(Velocity.FILE_RESOURCE_LOADER_PATH, realpath);
        try {
            Velocity.init(prop);
            //初始化vm模板
            Template  template = new Template();
            template = Velocity.getTemplate(urlVm, "utf-8");

            //生成html页面
            PrintWriter  writer = new PrintWriter(urlHtml);
            template.merge(context, writer);

            //切记关闭流
            writer.close();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

}

这样就在服务器下生成了静态页面，页面就直接访问你生成的页面，例如：http://localhost:8080/html/test.htm