八、框架整合（三） - SSH 整合
一、SSH整合的关键点
Spring，负责对象对象创建
Struts， 用Action处理请求
Hibernate：连接数据库，ORM框架
Spring与Struts框架整合，
关键点：action对象交给spring创建。
配置spring的监听器（ContextLoaderListener）
加载配置文件，初始化IOC容器。
配置struts的核心过滤器，拦截请求资源。
Spring与hibernate整合
关键点:
1.sessionFactory对象的创建交给spring。
2，事务管理交给spring。
1.1 配置web.xml (配置struts核心过滤器、配置spring监听器)
配置web.xml：
1.配置struts核心过滤器
2.配置spring监听器
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<filter>
<filter-name>struts2filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilterfilter-class>
filter>
<filter-mapping>
<filter-name>struts2filter-name>
<url-pattern>/*url-pattern>
filter-mapping>
<context-param>
<param-name>contextConfigLocationparam-name>
<param-value>
/WEB-INF/classes/bean-*.xml
param-value>
context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
listener>
web-app>
1.1.1 配置struts核心过滤器
struts核心过滤器的作用处理拦截请求资源，
将原本的servlet流程转入struts流程。
<filter>
<filter-name>struts2filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilterfilter-class>
filter>
<filter-mapping>
<filter-name>struts2filter-name>
<url-pattern>/*url-pattern>
filter-mapping>
1.1.2 配置spring监听器
spring监听器的作用是加载多个配置文件，初始化IOC容器
+++ 配置加载多个配置文件:
<context-param>
<param-name>contextConfigLocationparam-name>
<param-value>
/WEB-INF/classes/bean-dao.xml,
/WEB-INF/classes/bean-service.xml,
/WEB-INF/classes/bean-action.xml
param-value>
context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
listener>
+++ 配置加载N个配置文件:
<context-param>
<param-name>contextConfigLocationparam-name>
<param-value>/WEB-INF/classes/bean*.xmlparam-value>
context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
listener>
1.2 配置struts.xml (配置struts跳转资源路径，以及将action对象创建交给spring)
配置struts.xml:
1.配置请求路径与资源映射
2.将struts的action对象交给spring创建
>>>>>> struts.xml
<struts>
<package name="xxxx" extends="struts-default">
<action name="list" class="deptAction" method="sayHello">
<result name="list">/index.jspresult>
action>
package>
struts>
>>>>>> bean-controller.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
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.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<bean id="deptAction" class="org.jsoft.action.DeptAction">
<property name="deptService" ref="deptService">property>
bean>
beans>
1.3 配置bean-base.xml (整合hibernate)
配置bean-base.xml：
1.将sessionFactory对象交给spring
2.将事务管理交给spring
spring与hibernate整合有三种方式：
1.简单整合
spring创建sessionFactory对象时，
只需加载hibernate.cfg.xml配置文件即可
2.部分整合
spring创建sessionFactory对象时，
数据源配置在spring配置文件中，
其他配置在hibernate.cfg.xml配置文件中
3.完全整合
spring创建sessionFactory对象时，
所有配置都在spring配置问价那种
二、整合步骤
1） 引入SSH Jar文件
Struts 核心jar
Hibernate 核心jar
Spring
Core 核心功能
Web 对web模块支持
Aop aop支持
Orm 对hibernate支持
Jdbc/tx jdbc支持包、事务相关包
2）配置
Web.xml
初始化struts功能、spring容器
Struts.xml 配置请求路径与映射action的关系
Spring.xml IOC容器配置
bean-base.xml 【公用信息】
bean-service.xml
bean-dao.xml
bean-action.xml
3）开发
Entity/Dao/service/action
2.1 引入jar文件
2.2 代码
>>>>>> web.xml （配置struts核心过滤器、配置spring监听器）
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<filter>
<filter-name>struts2filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilterfilter-class>
filter>
<filter-mapping>
<filter-name>struts2filter-name>
<url-pattern>/*url-pattern>
filter-mapping>
<context-param>
<param-name>contextConfigLocationparam-name>
<param-value>
/WEB-INF/classes/bean-*.xml
param-value>
context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
listener>
web-app>
>>>>>> struts.xml (配置struts配置文件)
<struts>
<package name="xxxx" extends="struts-default">
<action name="list" class="deptAction" method="sayHello">
<result name="list">/index.jspresult>
action>
package>
struts>
>>>>>> bean-*.xml (使用完整整合hibernate方式进行整合)
bean-base.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
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.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/test">property>
<property name="driverClass" value="com.mysql.jdbc.Driver">property>
<property name="user" value="root">property>
<property name="password" value="root">property>
<property name="initialPoolSize" value="3">property>
<property name="maxPoolSize" value="6">property>
<property name="maxIdleTime" value="1000">property>
bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource">property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialectprop>
<prop key="hibernate.show_sql">trueprop>
<prop key="hibernate.hbm2ddl.auto">updateprop>
props>
property>
<property name="mappingDirectoryLocations">
<list>
<value>classpath:org/jsoft/entityvalue>
list>
property>
bean>
<bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory">property>
bean>
<tx:advice id="txAdvice" transaction-manager="txManager">
<tx:attributes>
<tx:method name="get*" read-only="true"/>
<tx:method name="find*" read-only="true"/>
<tx:method name="*" read-only="false"/>
tx:attributes>
tx:advice>
<aop:config>
<aop:pointcut expression="execution(* org.jsoft.service.*.*(..))" id="pt"/>
<aop:advisor advice-ref="txAdvice" pointcut-ref="pt"/>
aop:config>
beans>
bean-dao.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
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.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<bean id="deptDao" class="org.jsoft.dao.DeptDao">
<property name="sessionFactory" ref="sessionFactory">property>
bean>
beans>
bean-service.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
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.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<bean id="deptService" class="org.jsoft.service.DeptService">
<property name="deptDao" ref="deptDao">property>
bean>
beans>
bean-controller.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
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.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<bean id="deptAction" class="org.jsoft.action.DeptAction">
<property name="deptService" ref="deptService">property>
bean>
beans>
>>>>>> DeptEntity.hbm.xml
<hibernate-mapping package="org.jsoft.entity" >
<class name="DeptEntity" table="dept">
<id name="id" column="id" type="java.lang.String">id>
<property name="name" column="name">property>
class>
hibernate-mapping>
>>>>>> DeptEntity .java
public class DeptEntity {
private String id;
private String name;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
>>>>>> DeptDao.java
public class DeptDao {
private SessionFactory sessionFactory;
public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
public List<DeptEntity> query() {
Session session = sessionFactory.getCurrentSession();
Query query = session.createQuery("from DeptEntity");
List<DeptEntity> list = query.list();
return list;
}
}
>>>>>> DeptService .java
public class DeptService {
private DeptDao deptDao;
public void setDeptDao(DeptDao deptDao) {
this.deptDao = deptDao;
}
public List<DeptEntity> query() {
List<DeptEntity> query = deptDao.query();
return query;
}
}
>>>>>> DeptAction .java
public class DeptAction extends ActionSupport{
private DeptService deptService;
public void setDeptService(DeptService deptService) {
this.deptService = deptService;
}
public String sayHello() {
List<DeptEntity> result = deptService.query();
HttpServletRequest request = ServletActionContext.getRequest();
request.setAttribute("list", result);
return "list";
}
}
>>>>>> index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title heretitle>
head>
<body>
spring-struts-hibernate
<table>
<tr>
<td>IDtd>
<td>姓名td>
<tr>
<c:forEach items="${list}" var="item" varStatus="index">
<tr>
<td>${item.id}td>
<td>${item.name}td>
tr>
c:forEach>
table>
body>
html>
2.3 测试
将项目部署到tomcat中，访问
http://localhost:8080/my_spring_sturts_hibernate/list
三、整合细节
3.1 jsp页面不能直接使用hibernate中的懒加载数据，如果需要使用，需要配置
3.1.1 jsp页面为什么不能直接使用hibernate中的懒加载数据
SSH整合情况下，事务管理交给spring处理。
事务作用于service层，当执行一个service成功，就意味着事务已经提交了。此时spring就会提交事务，关闭session。
此时如果在jsp访问hibernate懒加载数据，肯定是报错的，
因为，此时session已经关闭
3.1.2 方式一：配置过滤器，使jsp可以直接访问懒加载数据
>>>>> 配置web.xml
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<filter>
<filter-name>OpenSessionInViewfilter-name>
<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilterfilter-class>
filter>
<filter-mapping>
<filter-name>OpenSessionInViewfilter-name>
<url-pattern>*.actionurl-pattern>
filter-mapping>
<filter>
<filter-name>struts2filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilterfilter-class>
filter>
<filter-mapping>
<filter-name>struts2filter-name>
<url-pattern>/*url-pattern>
filter-mapping>
<context-param>
<param-name>contextConfigLocationparam-name>
<param-value>
/WEB-INF/classes/bean-*.xml
param-value>
context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
listener>
web-app>个
3.1.3 方式二：lazy=false，关闭懒加载，可以使jsp可以直接访问懒加载数据
集合标签（Set标签、List标签等都可以）可以配置懒加载：
<set name="emps" table="l_emp" lazy="false">
<key column="deptId">key>
<one-to-many class="Emp">one-to-many>
set>
多对一标签可以配置懒加载：
<many-to-one name="dept" column="deptId" class="Dept" lazy="false">many-to-one>