struts2+hibernate+spring配置管理(一)-配置文件(转)
虽然是简单的用户登录,但东西一点不少,基于MVC原理实现,共分DAO层,SERVICE层,ACTION层和WEB层,其中DAO和SERVICE层都有各自的接口。
今天主要讲解配置文件的代码,我学习实例,喜欢从控制层出发,然后用到了哪些类或者JSP,再一一扯“蛋”扯出来。
当然,还是先看web.xml
xml 代码
- <?xml version="1.0" encoding="UTF-8"?>
- <web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.4"
- xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
- <!-- Spring ApplicationContext配置文件的路径 ,可使用通配符,多个路径用 1,号分隔,此参数用于后面的Spring-Context loader -->
- <context-param>
- <param-name>contextConfigLocation</param-name>
- <param-value>classpath*:spring/*.xml</param-value>
- </context-param>
- <!-- 著名 Character Encoding filter -->
- <filter>
- <filter-name>encodingFilter</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>
- </filter>
- <!--Hibernate Open Session in View Filter-->
- <filter>
- <filter-name>hibernateFilter</filter-name>
- <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
- </filter>
- <!-- ExtremeTable 导出Excel和Pdf的Filter -->
- <filter>
- <filter-name>eXtremeExport</filter-name>
- <filter-class>org.extremecomponents.table.filter.ExportFilter</filter-class>
- </filter>
- <filter-mapping>
- <filter-name>encodingFilter</filter-name>
- <url-pattern>*.do</url-pattern>
- </filter-mapping>
- <filter-mapping>
- <filter-name>encodingFilter</filter-name>
- <url-pattern>*.jsp</url-pattern>
- </filter-mapping>
- <filter-mapping>
- <filter-name>hibernateFilter</filter-name>
- <url-pattern>*.do</url-pattern>
- </filter-mapping>
- <!--Spring ApplicationContext 载入 -->
- <listener>
- <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
- </listener>
- <!-- Spring 刷新Introspector防止内存泄露 -->
- <listener>
- <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
- </listener>
- <!-- session超时定义,单位为分钟 -->
- <session-config>
- <session-timeout>10</session-timeout>
- </session-config>
- </web-app>
东西很简单,无非是配置一些过滤器呀,监听器的。主要讲一下openSessionInViewFilter吧,假设在你的应用中 Hibernate是通过spring 来管理它的session.如果在你的应用中没有使用OpenSessionInViewFilter或者 OpenSessionInViewInterceptor。session会在transaction结束后关闭,此时会抛出session is close 的异常。关于这方面的知识,值得大家去找一下相关资料仔细阅读。