集成spring mvc freemarker整合

spring mvc freemarker整合现在已经是很流行的一种架构模式了，写这篇章目的是为了方便以后自己的配置，也希望能为刚学习freemarker的同学一点帮助，废话不多说直接贴上代码：
使用工具：eclipse+maven
整体结构


1、先导入jar包
<!-- freemarker -->
  <dependency>
    <groupId>org.freemarker</groupId>
    <artifactId>freemarker</artifactId>
    <version>2.3.23</version>
</dependency>
<!-- spring -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context-support</artifactId>
    <version>4.3.6.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-beans</artifactId>
    <version>4.3.6.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>4.3.6.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>4.3.6.RELEASE</version>
</dependency>
<dependency>
    <groupId>commons-logging</groupId>
    <artifactId>commons-logging</artifactId>
    <version>1.2</version>
</dependency>
其中我遇到一个错误java.lang.NoSuchFieldError: DEFAULT_INCOMPATIBLE_IMPROVEMENTS
原因就是freemarker版本太低了，Caused by: java.lang.NoClassDefFoundError: org/springframework/ui/freemarker/FreeMarkerConfigurationFactory原因是少了spring-context-support，如果同样遇到的朋友需要注意一下。

2、配置applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>   
<beans xmlns="http://www.springframework.org/schema/beans"   
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
    xmlns:p="http://www.springframework.org/schema/p" 
    xmlns:aop="http://www.springframework.org/schema/aop"  
    xmlns:context="http://www.springframework.org/schema/context" 
    xmlns:jee="http://www.springframework.org/schema/jee" 
    xmlns:tx="http://www.springframework.org/schema/tx" 
    xsi:schemaLocation="   
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd 
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd 
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd 
        http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd 
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd"> 
 
  <context:component-scan base-package="com.yejiu.spring.freemarker.controller" />
  <bean id="freemarkerConfig" 
      class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer"> 
    <property name="templateLoaderPath" value="/WEB-INF/view/" /> 
    <property name="freemarkerSettings"> 
        <props> 
            <prop key="template_update_delay">0</prop> 
            <prop key="default_encoding">UTF-8</prop> 
            <prop key="number_format">0.##########</prop> 
            <prop key="datetime_format">yyyy-MM-dd HH:mm:ss</prop> 
            <prop key="classic_compatible">true</prop> 
            <prop key="template_exception_handler">ignore</prop> 
        </props> 
    </property> 
</bean> 

</beans>

3、在WEB-INF配置springmvc-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>   
<beans xmlns="http://www.springframework.org/schema/beans"   
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
    xmlns:p="http://www.springframework.org/schema/p" 
    xmlns:aop="http://www.springframework.org/schema/aop"  
    xmlns:context="http://www.springframework.org/schema/context" 
    xmlns:jee="http://www.springframework.org/schema/jee" 
    xmlns:tx="http://www.springframework.org/schema/tx" 
    xsi:schemaLocation="   
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd 
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd 
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd 
        http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd 
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
       
<!-- 使用注解的包，包括子集 -->
<context:component-scan base-package="com.yejiu.spring.freemarker.controller" />
<!-- 视图解析器 -->
<bean id="viewResolver"
class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver">
<property name="prefix" value="/" />
<property name="suffix" value=".ftl"></property>
<property name="contentType" value="text/html;charset=UTF-8"></property> 
</bean>   
</beans>
4、配置web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance
http://www.springmodules.org/schema/cache/springmodules-cache.xsd http://www.springmodules.org/schema/cache/springmodules-ehcache.xsd
" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>Freemaker</display-name>
<!--  Spring 上下文参数 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!--  Spring 容器启动器 -->
  <listener>
  <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <servlet>
  <servlet-name>springmvc</servlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
  <servlet-name>springmvc</servlet-name>
  <url-pattern>/*</url-pattern>
  </servlet-mapping>
</web-app>

5、在view创建hello.ftl模板

<!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>${title}</title> 
    </head> 
    <body> 
        ${content}
    </body> 
</html>

6、写一个控制器测试
package com.yejiu.spring.freemarker.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;



@Controller
@RequestMapping("/view")
public class HelloWorkController {

@RequestMapping("/hello")
public String hellowork(Model model){

model.addAttribute("title", "freemarker");
model.addAttribute("content", "welcome to freemarker");
return "hello";
}

}
到此一个freemarker的整合就完成了，就是那么容易