freemarker用法二，基于servlet处理-优快云博客

本文介绍了一个使用Freemarker模板引擎与Servlet整合的例子。通过创建一个简单的Web项目，演示了如何配置Freemarker并使用它来显示动态数据。

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新建一个web项目，在WebContent下(即WEB-INF的上级目录下)建立一个template文件。新建一个test.rj文件

<html>
	<head>
		<title>测试</title>
	</head>
	<body>
		<span style="color:#FF0000;font-family:微软雅黑;">${user}</span>
	</body>	
</html>

然后新建一个servlet

package com.xuzengqiang.freemarker.action;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import freemarker.template.Configuration;
import freemarker.template.DefaultObjectWrapper;
import freemarker.template.Template;

@SuppressWarnings("all")
public class FreemarkerServlet extends HttpServlet
{

	private static final long serialVersionUID = 1L;

	@Override
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
	{
		this.doPost(request, response);
	}
	
	@Override
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
	{
		request.setCharacterEncoding("UTF-8");
		response.setContentType("text/html;charset=UTF-8");
		
		Configuration cfg= new Configuration();
		cfg.setServletContextForTemplateLoading(this.getServletContext(),"template");
		cfg.setObjectWrapper(new DefaultObjectWrapper());
		
		Map root=new HashMap();
		root.put("user","xuzengqiang");
		Template temp=cfg.getTemplate("test.rj");
		
		PrintWriter out=response.getWriter();
		try
		{
			temp.process(root, out);
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
		out.flush();
		out.close();
		
	}
}

新建一个页面index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
	<title>freemarker测试</title>
</head>
	
<body>
	<a href="${pageContext.request.contextPath}/doFreemarkerServlet">链接</a>
</body>
</html>

在web.xml中配置相应的servlet信息。然后点击链接即可跳转到rj文件生成的页面打印xuzengqiang。