servlet3.0+规范后,允许servlet,filter,listener不必声明在web.xml中,而是以硬编码的方式存在,实现容器的零配置。
ServletContainerInitializer:启动容器时负责加载相关配置
package javax.servlet; import java.util.Set; public interface ServletContainerInitializer { public void onStartup(Set<Class<?>> c, ServletContext ctx) throws ServletException; }
容器启动时会自动扫描当前服务中ServletContainerInitializer的实现类,并调用其onStartup方法,其参数Set<Class<?>> c,可通过在实现类上声明注解javax.servlet.annotation.HandlesTypes(xxx.class)注解自动注入,@HandlesTypes会自动扫描项目中所有的xxx.class的实现类,并将其全部注入Set。
Spring为其提供了一个实现类:
SpringServletContainerInitializer
package org.springframework.web; import java.lang.reflect.Modifier; import java.util.LinkedList; import java.util.List; import java.util.ServiceLoader; import java.util.Set; import javax.servlet.ServletContainerInitializer; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.annotation.HandlesTypes; import org.springframework.core.annotation.AnnotationAwareOrderComparator; @HandlesTypes(WebApplicationInitializer.class) public class SpringServletContainerInitializer implements ServletContainerInitializer { @Override public void onStartup(Set<Class<?>> webAppInitializerClasses, ServletContext servletContext) throws ServletException { List<WebApplicationInitializer> initializers = new LinkedList<WebApplicationInitializer>(); if (webAppInitializerClasses != null) { for (Class<?> waiClass : webAppInitializerClasses) { // Be defensive: Some servlet containers provide us with invalid classes, // no matter what @HandlesTypes says... if (!waiClass.isInterface() && !Modifier.isAbstract(waiClass.getModifiers()) && WebApplicationInitializer.class.isAssignableFrom(waiClass)) { try { initializers.add((WebApplicationInitializer) waiClass.newInstance()); } catch (Throwable ex) { throw new ServletException("Failed to instantiate WebApplicationInitializer class", ex); } } } } if (initializers.isEmpty()) { servletContext.log("No Spring WebApplicationInitializer types detected on classpath"); return; } AnnotationAwareOrderComparator.sort(initializers); servletContext.log("Spring WebApplicationInitializers detected on classpath: " + initializers); for (WebApplicationInitializer initializer : initializers) { initializer.onStartup(servletContext); } } }
从中可以看出,WebApplicationInitializer才是我们需要关心的接口,我们只需要将相应的servlet,filter,listener等硬编码到该接口的实现类中即可。比如:
xml配置:
<!-- Log4jConfigListener --> <context-param> <param-name>log4jConfigLocation</param-name> <param-value>classpath:config/properties/log4j.properties</param-value> </context-param> <listener> <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class> </listener> <!-- OpenSessionInViewFilter --> <filter> <filter-name>hibernateFilter</filter-name> <filter-class> org.springframework.orm.hibernate4.support.OpenSessionInViewFilter </filter-class> </filter> <filter-mapping> <filter-name>hibernateFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- DemoServlet --> <servlet> <servlet-name>demoServlet</servlet-name> <servlet-class>web.function.servlet.DemoServlet</servlet-class> <load-on-startup>2</load-on-startup> </servlet> <servlet-mapping> <servlet-name>demoServlet</servlet-name> <url-pattern>/demo_servlet</url-pattern> </servlet-mapping>
编码配置:
@Order(1) public class CommonInitializer implements WebApplicationInitializer{ @Override public void onStartup(ServletContext servletContext) throws ServletException { //Log4jConfigListener servletContext.setInitParameter("log4jConfigLocation", "classpath:config/properties/log4j.properties"); servletContext.addListener(Log4jConfigListener.class); //OpenSessionInViewFilter OpenSessionInViewFilter hibernateSessionInViewFilter = new OpenSessionInViewFilter(); FilterRegistration.Dynamic filterRegistration = servletContext.addFilter( "hibernateFilter", hibernateSessionInViewFilter); filterRegistration.addMappingForUrlPatterns( EnumSet.of(DispatcherType.REQUEST, DispatcherType.FORWARD, DispatcherType.INCLUDE), false, "/"); //DemoServlet DemoServlet demoServlet = new DemoServlet(); ServletRegistration.Dynamic dynamic = servletContext.addServlet( "demoServlet", demoServlet); dynamic.setLoadOnStartup(2); dynamic.addMapping("/demo_servlet"); } }
Spring为我们提供了一些WebApplicationInitializer的抽象类,我们只需要继承并按需修改即可,比如:
1)org.springframework.security.web.context.AbstractSecurityWebApplicationInitializer : SpringSecurity相关配置
xml配置:
<listener> <listener-class>org.springframework.security.web.session.HttpSessionEventPublisher</listener-class> </listener> <filter> <filter-name>springSecurityFilterChain</filter-name> <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class> </filter> <filter-mapping> <filter-name>springSecurityFilterChain</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>
编码配置:
@Order(2) public class WebAppSecurityInitializer extends AbstractSecurityWebApplicationInitializer { //servletContext.addListener("org.springframework.security.web.session.HttpSessionEventPublisher"); //session监听器 @Override protected boolean enableHttpSessionEventPublisher() { return true; } }
2)org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer:MVC相关配置,比如加载spring配置文件,声明DispatcherServlet等等,参看下面的对比:
xml配置:
<context-param> <param-name>contextConfigLocation</param-name> <param-value> classpath:config/context/applicationContext-AppConfig.xml, classpath:config/context/applicationContext-SpringSecurityConfig.xml </param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <filter> <filter-name>Set Character Encoding</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>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>Set Character Encoding</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <servlet> <servlet-name>webmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:config/context/applicationContext-MvcConfig.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>webmvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping>
编码方式:
@Order(3) //spring DispatcherServlet的配置,其它servlet和监听器等需要额外声明,用@Order注解设定启动顺序 public class WebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer { /* * DispatcherServlet的映射路径 */ @Override protected String[] getServletMappings() { return new String[]{"/"}; } /* * 应用上下文,除web部分 */ @SuppressWarnings({ "unchecked", "rawtypes" }) @Override protected Class[] getRootConfigClasses() { //加载配置文件类,这里与上面的xml配置是对应的,需要使用@Configuration注解进行标注,稍后介绍 return new Class[] {AppConfig.class, SpringSecurityConfig.class}; } /* * web上下文 */ @SuppressWarnings({ "unchecked", "rawtypes" }) @Override protected Class[] getServletConfigClasses() { return new Class[] {MvcConfig.class}; } /* * 注册过滤器,映射路径与DispatcherServlet一致,路径不一致的过滤器需要注册到另外的WebApplicationInitializer中 */ @Override protected Filter[] getServletFilters() { CharacterEncodingFilter characterEncodingFilter = new CharacterEncodingFilter(); characterEncodingFilter.setEncoding("UTF-8"); characterEncodingFilter.setForceEncoding(true); return new Filter[] {characterEncodingFilter}; } }
SpringMVC4零配置 :代码下载
SpringMVC4零配置--web.xml
SpringMVC4零配置--应用上下文配置【AppConfig】
SpringMVC4零配置--SpringSecurity相关配置【SpringSecurityConfig】
SpringMVC4零配置--Web上下文配置【MvcConfig】
相关推荐
spring-mvc.xml spring-mybatis.xml web.xml log4j.properties,项目中需要用到的配置文件。直接可用。
SpringMVC基于代码的配置方式(零配置,无web.xml) 本资源博客地址:http://blog.csdn.net/u013816347/
springMVC零配置,无web.xml,无spring配置,纯java
maven构建web工程,springmvc4整合tiles布局框架,配置基于java注解方式,没有xml文件
基于SpringMVC+Hibernate4的考勤管理系统+.zip 项目环境 系统:Windows7 X64位系统 IDE:Intellij IDEA 14.0 后端技术选型 J D K 版 本:JDK 1.8 数 据 库:Mysql 5.7 WEB容器:Tomcat 7.0 视图框架:SpringMVC 4.3.6....
本篇文章主要介绍了Spring mvc的web.xml配置说明,小编觉得挺不错的,现在分享给大家,也给大家做个参考。一起跟随小编过来看看吧
这是一些配置文件,可以作为参考,个人感觉很方便的学习方法
spring在web.xml中和在struts中的不同配置..pdf
ssm一个简单项目所需的xml配置文件,spring+springmvc+mybatis框架中用到了三个XML配置文件:web.xml,spring-mvc.xml,spring-mybatis.xml.第一个不用说,每个web项目都会有的也是关联整个项目的配置.第二个文件spring-...
4)配置web.xml 3、不足之处 spring-webmvc-2.5.6.jar不支持@PathVariable注解,参数必须采用传统方式的?传递;3以上版本就支持@PathVariable注解,允许的话,建议采用SpringMVC4,增加了一些新特性 ;
springmvc、spring、mybatis的resources配置文件和web.xml
14. spring-oxm-4.1.1.RELEASE.jar Spring对于object/xml映射的支持,可以让JAVA与XML之间来回切换 15. spring-test-4.1.1.RELEASE.jar 支持Spring组建JUnit和TestNG的单元测试和集成测试。 16. spring-tx-4.1.1....
ssm框架基础配置文件,不需要自己每次都手动敲,拿来即用,注意修改少数几个路径,超级方便。
本工程主要是一个练手,里面对web.xml和applicationContext-base.xml有一个详细的说明。 <servlet> <servlet-name>Dispatcher</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet...
在配置文件里(spring-shiro.xml )中的配置有所修改。 <!-- 会话Cookie模板 --> <bean id="sessionIdCookie" class="org.apache.shiro.web.servlet.SimpleCookie"> <!--cookie的name,我故意取名叫...
在使用时,只需将其配置在项目的web.xml文件中,其配置代码如下: <servlet> <servlet-name>springmvc</servlet-name> <servlet-class> org.springframework.web.servlet.DispatcherServlet </servlet-class> <init-...
创建springMVC.xml配置,配置注解扫描,注解驱动,视图解析器 4.编写controller 第四步:spring和springmvc整合 整合的要点:就是让springmvc从servletContext中获取spring容器即可 1.在web.xml中配置spring的...
一、准备工作 1、工具:jdk1.7.0_80(64)+tomcat7.0.68+myeclipse10.6+mysql-5.5.48-win32 ...7、配置web.xml容器。-->配置文件:web.xml 8、测试三个框架的整合:Maven编译打包部署服务器,测试。
- 配置文件(.xml):30个 - 属性文件(.properties):10个 - JSP页面文件(.jsp):4个 - IntelliJ IDEA项目文件(.iml):2个 - Markdown文档(.md):2个 - 列表文件(.lst):2个 - IntelliJ IDEA专用...