初学S2SH搭建(三)

二、Struts2和Spring2.5的整合

(1)在web.xml中加入Struts2过滤器

<filter>

<filter-name>struts2</filter-name>

<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>

</filter>

<filter-mapping>

<filter-name>struts2</filter-name>

<url-pattern>/*</url-pattern>

</filter-mapping>

(2)导入struts2.1.6的jar包

这个里要导入7个jar包,可能很多教程上说只要加如5个核心包就可以了,但是2.1.6却要另外导入commons-io-1.3.2.jar、commons-fileupload-1.2.1.jar两个包,而且这个说明在官网的doc中也没有说明,这是我们需要注意一点的。当然我们也可以把struts2的所有包导入。

(3)加入struts2和spring整合的jar包

将struts2-spring-plugin-2.1.6.jar导入项目中。

(4)在src下建一个struts.xml,默认格式如下:

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts PUBLIC

"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"

"http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>

</struts>

在<struts></struts>之间添加一个常量,将struts交给spring管理。

<struts>

<constant name="struts.objectFactory" value="spring"/>

</struts>

(5)修改web.xml文件,配置Spring监听器和上下文变量

<context-param>

<param-name>contextConfigLocation</param-name>

<param-value>/WEB-INF/applicationContext*.xml</param-value>

</context-param>

<listener>

<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

</listener>

注意:此配置需要放在过滤器之前。

增加OpenSessionInView过滤器的设置,放在struts过滤器之前

作用:

Spring中对OpenSessionInViewFilter的描述:它是一个Servlet2.3过滤器,用来把一个Hibernate Session和一次完整的请求过程对应的线程相绑定。目的是为了实现"Open Session in View"的模式。例如: 它允许在事务提交之后延迟加载显示所需要的对象。






<filter>

<filter-name>lazyLoadingFilter</filter-name>

<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>

</filter>

<filter-mapping>

<filter-name>lazyLoadingFiter</filter-name>

<url-pattern>*.action</url-pattern>

</filter-mapping>

(6)编写Action类继承ActionSupport

package cn.zhang.crm.action;

import java.util.List;

import cn.zhang.crm.model.pojo.Employee;

import cn.zhang.crm.service.EmployeeManager;

import com.opensymphony.xwork2.ActionSupport;

publicclass EmployeeAction extends ActionSupport {

privatestaticfinallongserialVersionUID = -3117990268615208697L;

private EmployeeManager employeeManager;

private Employee employee;

private List employees;

privateintid;

publicint getId() {

returnid;

}

publicvoid setId(int id) {

this.id = id;

}

publicvoid setEmployeeManager(EmployeeManager employeeManager) {

this.employeeManager = employeeManager;

}

public String add(){

employeeManager.addEmployee(employee);

returnSUCCESS;

}

public String list(){

this.employees = employeeManager.listEmployee();

returnSUCCESS;

}

public String delete(){

employeeManager.deleteEmployee(id);

returnSUCCESS;

}

public List getEmployees() {

returnemployees;

}

publicvoid setEmployees(List employees) {

this.employees = employees;

}

publicvoid setEmployee(Employee employee) {

this.employee = employee;

}

public Employee getEmployee() {

returnemployee;

}

}

(7)配置struts.xml,将action写入

<package name="crm_employee" extends="struts-default" namespace="/emp">

<action name="add" class="addBean" method="add">

<result type="chain">

<param name="actionName">list</param>

</result>

</action>

<action name="list" class="listBean" method="list">

<result>list.jsp</result>

</action>

<action name="delete" class="deleteBean" method="delete">

<result>list.action</result>

</action>

<!-- Add actions here -->

</package>

(8)在applicationContext.xml中增加bean映射

<bean id="addBean" class="cn.zhang.crm.action.EmployeeAction" scope="prototype">

<property name="employeeManager">

<ref bean="employeeManager" />

</property>

</bean>

<bean id="listBean" class="cn.zhang.crm.action.EmployeeAction" scope="prototype">

<property name="employeeManager">

<ref bean="employeeManager" />

</property>

</bean>

<bean id="deleteBean" class="cn.zhang.crm.action.EmployeeAction" scope="prototype">

<property name="employeeManager">

<ref bean="employeeManager" />

</property>

</bean>

同时增加事务的处理

<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">

<property name="sessionFactory">

<ref local="sessionFactory"/>

</property>

</bean>

<!-- 配置事务特性,处理adddeleteupdate等开始方法,传播特性为REQUIRED-->

<tx:advice id="txAdvice" transaction-manager="transactionManager">

<tx:attributes>

<tx:method name="add*" propagation="REQUIRED" />

<tx:method name="delete*" propagation="REQUIRED" />

<tx:method name="update*" propagation="REQUIRED" />

<tx:method name="list*" propagation="REQUIRED" />

<tx:method name="*" read-only="true" />

</tx:attributes>

</tx:advice>

<aop:config>

<aop:pointcut id="allManagerMethod"

expression="execution(* cn.zhang.crm.service.*.*(..))" />

<aop:advisor advice-ref="txAdvice"

pointcut-ref="allManagerMethod" />

</aop:config>

要让applicationContext.xml认得事务处理,我们需要将beans头识别修改一下,如下:

<beans

xmlns="http://www.springframework.org/schema/beans"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns:aop="http://www.springframework.org/schema/aop"

xmlns:tx="http://www.springframework.org/schema/tx"

xsi:schemaLocation="http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring-beans-2.5.xsd

http://www.springframework.org/schema/tx

http://www.springframework.org/schema/tx/spring-tx-2.5.xsd

http://www.springframework.org/schema/aop

http://www.springframework.org/schema/aop/spring-aop-2.5.xsd ">

(9)添加jsp文件

emp/add.jsp

<%@ page language="java" pageEncoding="UTF-8"%>

<%@ taglib uri="/struts-tags" prefix="s"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<title>雇员用户信息增加</title>

<meta http-equiv="pragma" content="no-cache">

<meta http-equiv="cache-control" content="no-cache">

<meta http-equiv="expires" content="0">

<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

<meta http-equiv="description" content="This is my page">

<!--

<link rel="stylesheet" type="text/css" href="styles.css">

-->

</head>

<body>

<h1>雇员用户信息输入</h1>

<s:form action="add">

<s:textfield name="employee.name" label="姓名" />

<s:textfield name="employee.address" label="地址"/>

<s:textfield name="employee.phone" label="电话" />

<s:submit/>

</s:form>

</body>

</html>

emp/list.jsp

<%@ page language="java" pageEncoding="UTF-8"%>

<%@ taglib uri="/struts-tags" prefix="s"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<base href="<%=basePath%>">

<title>雇员用户信息显示</title>

<meta http-equiv="pragma" content="no-cache">

<meta http-equiv="cache-control" content="no-cache">

<meta http-equiv="expires" content="0">

<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

<meta http-equiv="description" content="This is my page">

<!--

<link rel="stylesheet" type="text/css" href="styles.css">

-->

</head>

<body>

<h1>雇员用户信息显示</h1>

<table>

<tr>

<td>编号</td>

<td>姓名</td>

<td>地址</td>

<td>电话</td>

</tr>

<s:iterator value="employees">

<tr>

<td><s:property value="id"/></td>

<td><s:property value="name"/></td>

<td><s:property value="address"/></td>

<td><s:property value="phone"/></td>

</tr>

</s:iterator>

</table>

</body>

</html>

(10)部署,测试效果

http://localhost:8088/crm/emp/add.jsp

到这里,整个实例算运行起来了。

可能出现的问题:

去除lib下面的asm-2.2.3.jar;xerces.jar否则会出现很多问题

cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration

Exception starting filter struts2

Caught exception while loading file struts-default.xml、

但 如果只导入struts2下的实例blank中的5个包则没有问题。因为struts2中lib下有很多插件plugin等包。如:有朋友说在项目中根本 没有采用spring架构,但配置了spring后才不出现该问题,其实这是因为他导入了struts2-spring-plugin- 2.0.11.jar。所以根据控制台报出的具体错误找出问题之所在。看看你的项目中具体是哪个出了问题。

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