freemarker 之 整合springMVC/struts2

freemarker 整合springMVC

web-config.xml配置：

<?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:context="http://www.springframework.org/schema/context"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
	<mvc:annotation-driven />
	<context:component-scan base-package="com.test.controller" />

	<!-- freemarker config 在其它视图之前配置   ，当找不到视图时，会向下执行下面视图配置 -->
	<bean id="freemarkerConfig"
		class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">
		<property name="templateLoaderPath" value="/WEB-INF/ftl/" /> <!--配置 模板加载路径    -->
	</bean> 

	<bean id="freeMarker"
		class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver">
		<property name="cache" value="true" />
		<property name="prefix" value="" /> <!-- 上面配置了加载路径，这边不用配置前缀了 -->
		<property name="suffix" value=".ftl" />
		<property name="contentType" value="text/html;charset=UTF-8"/>   <!-- 处理乱码 -->
	</bean>

	<!-- 页面View层基本信息设定    拦截所有视图请求，当找不到时报404，所以放后面-->
	<bean id="viewResolver"
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="viewClass"
			value="org.springframework.web.servlet.view.JstlView" />  <!-- 如果使用jstl的话，配置的属性 -->
		<property name="suffix" value=".jsp" />  <!-- 后缀 -->
		<property name="prefix" value="/WEB-INF/jsp/" />       <!-- 前缀 -->
	</bean>

</beans>

controller

@Controller
public class HelloCtroller {
	 
	@RequestMapping(value="hello")
	public String hello(Model model){
		model.addAttribute("username","张三");
		return "hello"; 
	} 
	@RequestMapping(value="world") 
	public String helloworld(Model model){
		model.addAttribute("username","李四");
		return "world";  //http://localhost:8080/freemarker/world 在freeMarker视图配置中 找不到视图world.ftl，则用全局视图找到world.jsp,故返回world.jsp
	}     
}

文件组织结构：

freemarker 整合struts2
解压struts2-core-X.X.X.jar文件，把在META-INF文件夹下面的struts-tags.tld文件复制到WEB-INF文件夹下

在web.xml文件中配置freemark同时启动JSPSupportServlet.  web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  <filter>
  	<filter-name>struts2</filter-name>
  	<filter-class>
  		org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
  	</filter-class>
  </filter>
  <filter-mapping>
  	<filter-name>struts2</filter-name>
  	<url-pattern>/*</url-pattern>
  </filter-mapping>
  
   <servlet>
        <servlet-name>freemarker</servlet-name>
        <servlet-class>
            freemarker.ext.servlet.FreemarkerServlet
        </servlet-class>
        <!--下面的配置freemarke的ftl文件的位置 -->
        <init-param>
            <param-name>TemplatePath</param-name>
            <param-value>/</param-value>
        </init-param>
        <!-- 是否和服务器（tommcat)一起启动。0为不。1为是-->
        <load-on-startup>1</load-on-startup>
    </servlet>

     <servlet-mapping>
	      <servlet-name>freemarker</servlet-name>
	      <url-pattern>*.ftl</url-pattern>
     </servlet-mapping>


	 <servlet>
		  <!-- define a JspSupportServlet Object -->
		  <servlet-name>JspSupportServlet</servlet-name>
		  <servlet-class>org.apache.struts2.views.JspSupportServlet</servlet-class>
		  <!-- setting JspSupportServlet auto start -->
		  <load-on-startup>1</load-on-startup>
	 </servlet>
</web-app>

struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
	<constant name="struts.devMode" value="true" />
	<constant name="struts.i18n.encoding" value="utf-8" />
	<constant name="struts.enable.DynamicMethodInvocation" value="true" />
	<package name="default" extends="struts-default">
		<action name="test" class="com.sxt.test.TestAction">
			<result name="success" type="freemarker">test.ftl</result>
		</action>
	</package>
</struts>    

TestAction

public class TestAction extends ActionSupport {
	private String companyName="尚学堂";
	
	public String execute() throws Exception {
		System.out.println("TestAction.execute()");
		return SUCCESS;
	}
	public String getCompanyName() {
		return companyName;
	}
	public void setCompanyName(String companyName) {
		this.companyName = companyName;
	}
}

test.ftl

<#assign s=JspTaglibs["/WEB-INF/struts-tags.tld"] /> <#--这一句是为了让Freemarker识别struts2的标签 指出struts-tags.tld位置-->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>My JSP 'index.jsp' starting page</title>
  </head>
  <body>
	<h1>${companyName}</h1>
	<@s.form action="reg" >
		<@s.textfield label="用户名" name="uname"  />
		<@s.submit />
	</@s.form>    
  </body>
</html>

组织结构：