配置文件下载

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阿里资深架构师: 2018-08-24 10:35:40

刚开始学习，来一份HelloWorld，我用的maven，结构：

pom.xml:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">	<modelVersion>4.0.0</modelVersion>	<groupId>com.sf.wdx</groupId>	<artifactId>test-freemarker</artifactId>	<version>0.0.1-SNAPSHOT</version>	<packaging>war</packaging>		<!-- 管理版本 -->	<properties>		<spring.version>4.3.8.RELEASE</spring.version>	</properties>		<dependencies>			<!-- spring -->		<dependency>			<groupId>org.springframework</groupId>			<artifactId>spring-context-support</artifactId>			<version>${spring.version}</version>		</dependency>		<dependency>			<groupId>org.springframework</groupId>			<artifactId>spring-tx</artifactId>			<version>${spring.version}</version>		</dependency>		<dependency>			<groupId>org.springframework</groupId>			<artifactId>spring-orm</artifactId>			<version>${spring.version}</version>		</dependency>				<!-- spring-aop -->		<dependency>			<groupId>org.springframework</groupId>			<artifactId>spring-aop</artifactId>			<version>${spring.version}</version>		</dependency>		<dependency>			<groupId>org.aspectj</groupId>			<artifactId>aspectjweaver</artifactId>			<version>1.8.10</version>		</dependency>				<!-- springmvc -->		<dependency>			<groupId>org.springframework</groupId>			<artifactId>spring-webmvc</artifactId>			<version>${spring.version}</version>		</dependency>		<!-- freemarker -->		<dependency>			<groupId>javax.servlet</groupId>			<artifactId>servlet-api</artifactId>			<version>2.5</version>			<scope>provided</scope>		</dependency>		<dependency>			<groupId>org.freemarker</groupId>			<artifactId>freemarker</artifactId>			<version>2.3.23</version>		</dependency>				<!-- fastjson -->		<dependency>			<groupId>com.alibaba</groupId>			<artifactId>fastjson</artifactId>			<version>1.2.31</version>		</dependency>		<!-- 工具类 -->		<dependency>			<groupId>org.apache.commons</groupId>			<artifactId>commons-lang3</artifactId>			<version>3.6</version>		</dependency>		<dependency>			<groupId>commons-collections</groupId>			<artifactId>commons-collections</artifactId>			<version>3.2.2</version>		</dependency>		<dependency>			<groupId>commons-fileupload</groupId>			<artifactId>commons-fileupload</artifactId>			<version>1.3.3</version>		</dependency>		<!-- 日志 -->		<dependency>			<groupId>ch.qos.logback</groupId>			<artifactId>logback-classic</artifactId>			<version>1.2.3</version>		</dependency>		<dependency>			<groupId>org.slf4j</groupId>			<artifactId>slf4j-api</artifactId>			<version>1.7.25</version>		</dependency>	</dependencies>	</project>

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">	<welcome-file-list>		<welcome-file>index.html</welcome-file>	</welcome-file-list>	<!-- post请求字符编码过滤器 -->	<filter>		<filter-name>CharacterEncodingFilter</filter-name>		<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>		<init-param>			<param-name>encoding</param-name>			<param-value>UTF-8</param-value>		</init-param>		<init-param>			<param-name>forceRequestEncoding</param-name>			<param-value>true</param-value>		</init-param>		<init-param>			<param-name>forceResponseEncoding</param-name>			<param-value>true</param-value>		</init-param>	</filter>	<filter-mapping>		<filter-name>CharacterEncodingFilter</filter-name>		<url-pattern>/*</url-pattern>	</filter-mapping>	<!-- 支持PUT请求内容过滤器 -->	<filter>		<filter-name>HttpMethodFilter</filter-name>		<filter-class>org.springframework.web.filter.HttpPutFormContentFilter</filter-class>	</filter>	<filter-mapping>		<filter-name>HttpMethodFilter</filter-name>		<url-pattern>/*</url-pattern>	</filter-mapping>	<!-- 支持rest风格过滤器 -->	<filter>		<filter-name>HiddenHttpMethodFilter</filter-name>		<filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>	</filter>	<filter-mapping>		<filter-name>HiddenHttpMethodFilter</filter-name>		<url-pattern>/*</url-pattern>	</filter-mapping>	<!-- 自定义服务器监听器 -->	<listener>		<listener-class>com.sf.wdx.listener.MyAppListener</listener-class>	</listener>	<!-- 启动Spring -->	<context-param>		<param-name>contextConfigLocation</param-name>		<param-value>classpath:spring/spring-*.xml</param-value>	</context-param>	<listener>		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>	</listener>	<!-- 启动SpringMVC前段控制器 -->	<servlet>		<servlet-name>springDispatcherServlet</servlet-name>		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>		<init-param>			<param-name>contextConfigLocation</param-name>			<param-value>classpath:spring/springmvc.xml</param-value>		</init-param>		<load-on-startup>1</load-on-startup>	</servlet>	<servlet-mapping>		<servlet-name>springDispatcherServlet</servlet-name>		<url-pattern>/</url-pattern>	</servlet-mapping></web-app>

spring-beans.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: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/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">	<!-- 包扫描，不扫描@Controller -->	<context:component-scan base-package="com.sf.wdx.*" use-default-filters="true">		<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>	</context:component-scan></beans>

springmvc.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: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-4.3.xsd		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">		<!-- 只扫描@Controller -->	<context:component-scan base-package="com.sf.wdx.controller" use-default-filters="false">		<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>	</context:component-scan>		<!-- freemarker视图解析器 -->	<bean id="viewResolver" class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver">		<!-- 优先级0，优先解析视图 -->		<property name="order" value="0"/>		<!-- 跳转页面的前缀 -->		<property name="prefix" value="/WEB-INF/pages/"></property>		<!-- 跳转页面的后缀 -->		<property name="suffix" value=".html"></property>		<!-- 视图解析缓存，默认是true -->		<property name="cache" value="true"></property>		<property name="contentType" value="text/html;charset=UTF-8"></property>	</bean>		<!--通用视图解析器-->	<bean id="viewResolverCommon" class="org.springframework.web.servlet.view.InternalResourceViewResolver">		<!-- 优先级1，当0的解析不出来才会用这个解析视图 -->		<property name="order" value="1"/>		<property name="prefix" value="/WEB-INF/pages/"/>  		<property name="suffix" value=".jsp"/>	</bean>		<!-- 配置文件上传解析器 -->	<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">		<property name="defaultEncoding" value="UTF-8"></property>		<!-- 最大上传200M的文件 -->		<property name="maxUploadSize" value="#{1024*1024*200}"></property>	</bean>		<!-- 模板引擎的配置对象 -->	<bean id="freeMarkerConfig" class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">		<property name="templateLoaderPath" value=""/>		<property name="freemarkerSettings">			<props>				<!-- 设置标签类型，两种：[]和<>。[]这种解析要快一些 -->				<prop key="tag_syntax">auto_detect</prop>				<!-- 检查模板更新时间间隔，默认5s，开发环境可以小一些方便调试，生产环境可以调大些 -->				<prop key="template_update_delay">1</prop>				<prop key="defaultEncoding">UTF-8</prop>				<prop key="url_escaping_charset">UTF-8</prop>				<prop key="locale">zh_CN</prop>				<!-- 布尔格式化 -->				<prop key="boolean_format">true,false</prop>				<!-- 时间格式化 -->				<prop key="datetime_format">yyyy-MM-dd HH:mm:ss</prop>				<prop key="date_format">yyyy-MM-dd</prop>				<prop key="time_format">HH:mm:ss</prop>				<!-- 数字格式化 -->				<prop key="number_format">0.######</prop>				<!-- 去除多余的空格 -->				<prop key="whitespace_stripping">true</prop>				<!-- 自动引入ftl文件，这个表示每个freemarker的视图页面都会自动引入这个ftl文件。里面定义的就是一些宏，如text文本框，各种form元素				<prop key="auto_import">/WEB-INF/ftl/spring.ftl as s</prop> -->			</props>		</property>		<!-- 自定义指令 -->		<property name="freemarkerVariables">			<map>                <entry key="xml_escape" value-ref="fmXmlEscape" />                <!--                 <entry key="baseinfo" value-ref="myDirective1"/>				<entry key="sortSalaryDirec" value-ref="sortSalaryDirectiveModel"/> 				-->			</map>		</property>	</bean>	    <bean id="fmXmlEscape" class="freemarker.template.utility.XmlEscape"/>		<!-- 模板引擎配置的另一种方式	<bean id="freemarkerConfiguration" class="org.springframework.beans.factory.config.PropertiesFactoryBean">		<property name="location" value="classpath:properties/freemarker.properties"></property>	</bean> -->		<!-- 映射静态资源 -->	<mvc:default-servlet-handler/>	<!-- 映射动态资源 -->	<mvc:annotation-driven/></beans>

HelloController:

package com.sf.wdx.controller;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping;/** * 描述：HelloWorld * @author 80002888 * @date   2018年8月23日 */@Controllerpublic class HelloController {	/**	* 拦截/hello请求	*	@ReturnType	String 	*	@Date	2018年8月24日	上午10:21:47	*  @Param  @param model	*  @Param  @return	*/	@RequestMapping(value="/hello")	public String hello(Model model){		model.addAttribute("username", "张三");		return "success";	}	}

MyAppListener:

package com.sf.wdx.listener;import javax.servlet.ServletContext;import javax.servlet.ServletContextEvent;import javax.servlet.ServletContextListener;import org.slf4j.Logger;import org.slf4j.LoggerFactory;/** * 描述：自定义web容器监听器 * @author 80002888 * @date   2018年8月23日 */public class MyAppListener implements ServletContextListener {	private Logger logger = LoggerFactory.getLogger(MyAppListener.class);		@Override	public void contextInitialized(ServletContextEvent sce) {		ServletContext context = sce.getServletContext();		context.setAttribute("ctp", context.getContextPath());		logger.info("ServletContext...init...");	}	@Override	public void contextDestroyed(ServletContextEvent sce) {		logger.info("ServletContext...destroy...");	}}

index.html:

<!DOCTYPE html><html><head><meta charset="UTF-8"><title>Insert title here</title></head><body>	<a href="/test-freemarker/hello">hello</a></body></html>

success.html:

<!DOCTYPE html><html>	<head>		<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">		<title>Insert title here</title>	</head>	<body>		<h1>你好，${username}</h1>	</body></html>

在tomcat中运行，输入地址：http://localhost:8080/test-freemarker/，点击hello，结果：

简成: 2018-02-10 22:35:29

spring:
    freemarker:
      charset: UTF-8
      suffix: .ftl
      check-template-location: true
      template-loader-path: classpath:/templates
      content-type: text/html
      cache: false