struts2 整合 velocity、入門案例

整合

struts2想要用velocity模板需要如下幾個包：

velocity-1.7.jar velocity-tools-2.0.jar commons-collections-3.2.jar

然後只需要在web.xml中配置result type=velocity就可以了。

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	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>structs2_day01</display-name>

	<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>velocity</servlet-name>
		<servlet-class>org.apache.velocity.tools.view.VelocityViewServlet</servlet-class>
		<!-- 需要在struts.xml中定義兩個常量，來幫助struts尋找到tools.xml和velocity.properties的位置 -->
		<init-param>
			<param-name>org.apache.velocity.toolbox</param-name>
			<param-value>/WEB-INF/tools.xml</param-value>
		</init-param>
		<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>

	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
		<welcome-file>index.htm</welcome-file>
		<welcome-file>index.jsp</welcome-file>
		<welcome-file>default.html</welcome-file>
		<welcome-file>default.htm</welcome-file>
		<welcome-file>default.jsp</welcome-file>
	</welcome-file-list>
</web-app>

struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
	"http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>
	<!-- 需要在struts.xml中定義兩個常量，來幫助struts尋找到tools.xml和velocity.properties的位置 -->
	<constant name="struts.velocity.toolboxlocation"
		value="WEB-INF/tools.xml" />
	<constant name="struts.velocity.configfile"
		value="WEB-INF/velocity.properties" />
	<!-- 動態方法調用，爲true時，就可以在struts.xml配置“*”的通配符，來調用action裏的方法 -->
	<constant name="struts.enable.DynamicMethodInvocation"
		value="false" />
	<constant name="struts.devMode" value="true" />
	<!-- 修改 struts2 默認常量值 -->
	<constant name="struts.i18n.encoding" value="UTF-8" />


	<package name="default" namespace="/" extends="struts-default">
		<default-action-ref name="index" />
		<global-results>
			<result name="error">/error.jsp</result>
		</global-results>
		<global-exception-mappings>
			<exception-mapping exception="java.lang.Exception"
				result="error" />
		</global-exception-mappings>
	</package>

	<!-- 引入hello.xml文件 -->
	<include file="struts-hello.xml" />
	<!-- Add packages here -->
</struts>

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參考： https://www.cnblogs.com/jameslif/p/3653868.html

入門案例

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參考： https://www.cnblogs.com/lexus/archive/2012/02/10/2344748.html

https://www.iteye.com/blog/zyjustin9-2093034