spring hibernate struts 整合开发(3)
一. spring hibernate struts 整合开发(1) - 搭建环境二. spring hibernate struts 整合开发(2) - Spring集成的Hibernate编码和测试
三. spring hibernate struts 整合开发(3) - Struts集成Spring
四. spring hibernate struts 整合开发(4) - Struts与Spring集成2
五. spring hibernate struts 整合开发(5) - Hibernate二级缓存
六. spring hibernate struts 整合开发(6) - 额外功能
1. 在web容器中实例化spring容器
spring自带的实例化容器方法是:
AbstractApplicationContext ctx = new ClassPathXmlApplicationContext("beans.xml");
在web.xml中,通过配置listener和context param:
<!-- 指定spring的配置文件,默认从web根目录寻找配置文件,我们可以通过spring提供的classpath前缀指定从类路径下寻找 --><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:beans.xml</param-value></context-param><!-- 对Spring容器进行实例化 --><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener>
查看ContextLoaderListener源码,可以看到spring把上下文放到servletContext里:
servletContext.setAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE, this.context);
2. Struts配置
a. 在web.xml中,加入struts配置段:
<servlet><servlet-name>struts</servlet-name><servlet-class>org.apache.struts.action.ActionServlet</servlet-class><init-param> <param-name>config</param-name> <param-value>/WEB-INF/struts-config.xml</param-value></init-param><load-on-startup>0</load-on-startup></servlet><servlet-mapping> <servlet-name>struts</servlet-name> <url-pattern>*.do</url-pattern></servlet-mapping>
b. 新建struts-config.xml文件,加入下面配置:
<?xml version="1.0" encoding="utf-8" ?><!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN" "http://jakarta.apache.org/struts/dtds/struts-config_1_3.dtd"><struts-config> <action-mappings> <action path="/person/list" type="cn.john.web.action.PersonAction" validate="false"> <forward name="list" path="/WEB-INF/page/person_list.jsp"/> </action></struts-config>
3. 新建com.john.web.action.PersonAction类,重载execute方法:
public class PersonAction extends Action{@Overridepublic ActionForward execute(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response)throws Exception {// Spring provides us a util to get the contextWebApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(this.getServlet().getServletContext());PersonService personService = (PersonService)ctx.getBean("personService");request.setAttribute("persons", personService.getPersons());return mapping.findForward("list");}}
4. 新建person_list.jsp文件,加入下面内容:
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %><body><c:forEach items="${persons}" var="person">${person.id} ${person.name}</c:forEach></body>
开启Web服务(Tomcat, jetty等)测试
整理自:传智播客spring教程
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