基于Java的Spring框架来操作FreeMarker模板的示例

1、通过String来创建模版对象，并执行插值处理

import freemarker.template.Template; 

import java.io.OutputStreamWriter;
import java.io.StringReader;
import java.util.HashMap;
import java.util.Map; 

/**
* Freemarker最简单的例子
*
* @author leizhimin 11-11-17 上午10:32
*/
public class Test2 {
    public static void main(String[] args) throws Exception{
        //创建一个模版对象
        Template t = new Template(null, new StringReader("用户名：${user};URL：  ${url};姓名： 　${name}"), null);
        //创建插值的Map
        Map map = new HashMap();
        map.put("user", "lavasoft");
        map.put("url", "http://www.baidu.com/");
        map.put("name", "百度");
        //执行插值，并输出到指定的输出流中
        t.process(map, new OutputStreamWriter(System.out));
    }
}

执行后，控制台输出结果：

用户名：lavasoft;

URL：  http://www.baidu.com/;

姓名： 　百度
Process finished with exit code 0

2、通过文件来创建模版对象，并执行插值操作

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

import java.io.File;
import java.io.OutputStreamWriter;
import java.util.HashMap;
import java.util.Map; 

/**
* Freemarker最简单的例子
*
* @author leizhimin 11-11-14 下午2:44
*/
public class Test {
    private Configuration cfg;      //模版配置对象 

    public void init() throws Exception {
        //初始化FreeMarker配置
        //创建一个Configuration实例
        cfg = new Configuration();
        //设置FreeMarker的模版文件夹位置
        cfg.setDirectoryForTemplateLoading(new File("G:\\testprojects\\freemarkertest\\src"));
    } 

    public void process() throws Exception {
        //构造填充数据的Map
        Map map = new HashMap();
        map.put("user", "lavasoft");
        map.put("url", "http://www.baidu.com/");
        map.put("name", "百度");
        //创建模版对象
        Template t = cfg.getTemplate("test.ftl");
        //在模版上执行插值操作，并输出到制定的输出流中
        t.process(map, new OutputStreamWriter(System.out));
    } 

    public static void main(String[] args) throws Exception {
        Test hf = new Test();
        hf.init();
        hf.process();
    }
}

创建模版文件test.ftl

<html>
<head>
  <title>Welcome!</title>
</head>
<body>
  <h1>Welcome ${user}!</h1>
  <p>Our latest product:
  <a href="${url}">${name}</a>!
</body>
</html>

尊敬的用户你好：
用户名：${user};
URL：  ${url};
姓名： 　${name}

执行后，控制台输出结果如下：

<html>
<head>
  <title>Welcome!</title>
</head>
<body>
  <h1>Welcome lavasoft!</h1>
  <p>Our latest product:
  <a href="http://www.baidu.com/">百度</a>!
</body>
</html>

尊敬的用户你好：

用户名：lavasoft;
URL：  http://www.baidu.com/;
姓名： 　百度
Process finished with exit code 0

3.基于注解的Spring+freemarker实例
web项目图

web.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
 <servlet>
  <!-- 配置DispatcherServlet -->
  <servlet-name>springmvc</servlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  <!-- 指定spring mvc配置文件位置 不指定使用默认情况 -->
   <init-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/springmvc-servlet.xml</param-value>
    <!--默认:/WEB-INF/<servlet-name>-servlet.xml
    classpath方式:<param-value>classpath:/spring-xml/*.xml</param-value>
     -->
    </init-param>
  <!-- 设置启动顺序 -->
  <load-on-startup>1</load-on-startup>
 </servlet>
 <!-- 配置映射 servlet-name和DispatcherServlet的servlet一致 -->
 <servlet-mapping>
  <servlet-name>springmvc</servlet-name>
  <url-pattern>/</url-pattern><!-- 拦截以/所有请求 -->
 </servlet-mapping>
 <welcome-file-list>
  <welcome-file>index.jsp</welcome-file>
 </welcome-file-list>
</web-app>

springmvc-servlet.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
  xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"
  xsi:schemaLocation="http://www.springframework.org/schema/beans
  http://www.springframework.org/schema/beans/spring-beans.xsd
   http://www.springframework.org/schema/mvc
   http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
   http://www.springframework.org/schema/aop
   http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
   http://www.springframework.org/schema/context
   http://www.springframework.org/schema/context/spring-context.xsd"> 

   <!-- 默认注解映射支持 -->
   <mvc:annotation-driven/>
   <!-- 自动扫描包 -->
   <context:component-scan base-package="com.spring.freemarker" /> 

   <!--<context:annotation-config /> 配置自动扫描包配置此配置可省略-->
   <!--<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" 配置自动扫描包配置此配置可省略/>-->
   <!-- 配置freeMarker的模板路径 -->
   <bean class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">
    <property name="templateLoaderPath" value="WEB-INF/ftl/" />
    <property name="defaultEncoding" value="UTF-8" />
   </bean>
   <!-- freemarker视图解析器 -->
   <bean class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver">
    <property name="suffix" value=".ftl" />
    <property name="contentType" value="text/html;charset=UTF-8" />
    <!-- 此变量值为pageContext.request, 页面使用方法：rc.contextPath -->
    <property name="requestContextAttribute" value="rc" />
   </bean>
</beans>

FreeMarkerController类

package com.spring.freemarker; 

import java.util.ArrayList;
import java.util.List; 

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

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView; 

import com.spring.vo.User; 

@Controller
@RequestMapping("/home")
public class FreeMarkerController { 

  @RequestMapping("/index")
  public ModelAndView Add(HttpServletRequest request, HttpServletResponse response) { 

    User user = new User();
    user.setUsername("zhangsan");
    user.setPassword("1234");
    List<User> users = new ArrayList<User>();
    users.add(user);
    return new ModelAndView("index", "users", users);
  } 

}

User类

package com.spring.vo; 

public class User { 

  private String username;
  private String password; 

  public String getUsername() {
    return username;
  } 

  public void setUsername(String username) {
    this.username = username;
  } 

  public String getPassword() {
    return password;
  } 

  public void setPassword(String password) {
    this.password = password;
  } 

}

index.ftl文件

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<#list users as user>
username : ${user.username}<br/>
password : ${user.password}
</#list>
</body>
</html>

部署到tomcat，运行：http://localhost:8080/springmvc/home/index
  显示结果：

 username : zhangsan
 password : 1234