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注明:来自传智播客黎活明老师讲解PPT,仅供参考,实际项目开发SSH2整合的数据源配置来自hibernate.cfg.xml
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下面给出整合开发时Struts 2、 Hibernate、Spring需要的JAR。
struts2-core-2.x.x.jar :Struts 2框架的核心类库
Xwork-core-2.x.x.jar :XWork类库,Struts 2在其上构建
ognl-2.6.x.jar :对象图导航语言(Object Graph Navigation Language),struts2框架通过其读写对象的属性
freemarker-2.3.x.jar :Struts 2的UI标签的模板使用FreeMarker编写
commons-fileupload-1.2.x.jar 文件上传组件,2.1.6版本后需要加入此文件
struts2-spring-plugin-2.x.x.jar :用于struts2集成Spring的插件
hibernate核心安装包下的(下载路径:http://www.hibernate.org/,点击“Hibernate Core”右边的“Downloads”):
hibernate3.jar
lib\bytecode\cglib\hibernate-cglib-repack-2.1_3.jar
lib\required\*.jar
hibernate 注解安装包下的(下载路径:www.hibernate.org,点击“Hibernate Annotations”右边的“Downloads”):
hibernate-annotations.jar
lib\ejb3-persistence.jar、hibernate-commons-annotations.jar
Hibernate针对JPA的实现包(下载路径:www.hibernate.org,点击“Hibernate Entitymanager”右边的“Downloads”):
hibernate-entitymanager.jar
lib\test\log4j.jar、slf4j-log4j12.jar
Spring安装包下的
dist\spring.jar
lib\c3p0\c3p0-0.9.1.2.jar lib\aspectj\aspectjweaver.jar、aspectjrt.jar lib\cglib\cglib-nodep-2.1_3.jar
lib\j2ee\common-annotations.jar lib\log4j\log4j-1.2.15.jar lib\jakarta-commons\commons-logging.jar
MYSQL数据库驱动jar
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Spring的配置模版:
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 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-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"> </beans>
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第一步在Spring中配置数据源:
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"> <property name="driverClass" value="org.gjt.mm.mysql.Driver"/> <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/itcast?useUnicode=true&characterEncoding=UTF-8"/> <property name="user" value="root"/> <property name="password" value="123456"/> <!--初始化时获取的连接数,取值应在minPoolSize与maxPoolSize之间。Default: 3 --> <property name="initialPoolSize" value="1"/> <!--连接池中保留的最小连接数。--> <property name="minPoolSize" value="1"/> <!--连接池中保留的最大连接数。Default: 15 --> <property name="maxPoolSize" value="300"/> <!--最大空闲时间,60秒内未使用则连接被丢弃。若为0则永不丢弃。Default: 0 --> <property name="maxIdleTime" value="60"/> <!--当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。Default: 3 --> <property name="acquireIncrement" value="5"/> <!--每60秒检查所有连接池中的空闲连接。Default: 0 --> <property name="idleConnectionTestPeriod" value="60"/> </bean>
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第二步集成进hibernate :
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <property name="mappingResources"> <list> <value>cn/itcast/bean/buyer.hbm.xml</value> </list> </property> <property name="hibernateProperties"> <value> hibernate.dialect=org.hibernate.dialect.MySQL5Dialect hibernate.hbm2ddl.auto=update hibernate.show_sql=false hibernate.format_sql=false </value> </property> </bean>
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第三步使用Spring容器管理事务服务:
<bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory"/> </bean> <!--使用基于注解方式配置事务 --> <tx:annotation-driven transaction-manager="txManager"/>
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配置hibernate实体映射文件buyer.hbm.xml:
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="cn.itcast.bean"> <class name=“Buyer" table=“buyer"> <id name="username" length="20"/> <property name="password" length="20" not-null="true"/> <property name="gender" not-null="true" length="5"> <type name="org.hibernate.type.EnumType"> <param name="enumClass">cn.itcast.bean.Gender</param> <!-- 12为java.sql.Types.VARCHAR常量值,即保存枚举的字面值到数据库。如果不指定type参数,保存枚举的索引值(从0开始)到数据库--> <param name="type">12</param> </type> </property> </class> </hibernate-mapping>
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在web容器中使用Listener实例化spring容器和配置struts2
<!-- 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> 配置struts2 <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>
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struts2的配置文件模版struts.xml如下。常量struts.objectFactory=spring明确指出将由Spring负责创建Action实例。
Spring负责创建Action实例。 <?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> <!-- 默认的视图主题 --> <constant name="struts.ui.theme" value="simple" /> <constant name="struts.objectFactory" value="spring" /> <package name="person" namespace="/person" extends="struts-default"> <global-results> <result name="message">/WEB-INF/page/message.jsp</result> </global-results> <action name="action_*" class="personList" method="{1}"> <result name="list">/WEB-INF/page/persons.jsp</result> </action> </package> </struts> 为了能从spring容器中寻找到Action bean,要求action配置的class属性值和spring中bean的名称相同。
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使用spring解决struts2乱码问题。
<filter> <filter-name>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> </filter> <filter-mapping> <filter-name>encoding</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>
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使用spring解决hibernate因session关闭导致的延迟加载例外问题。
<filter> <filter-name>OpenSessionInViewFilter</filter-name> <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class> <init-param> <!-- 指定org.springframework.orm.hibernate3.LocalSessionFactoryBean在spring配置文件中的名称,默认值为sessionFactory.如果LocalSessionFactoryBean在spring中的名称不是sessionFactory,该参数一定要指定,否则会出现找不到sessionFactory的例外 --> <param-name>sessionFactoryBeanName</param-name> <param-value>sessionFactory</param-value> </init-param> </filter> <filter-mapping> <filter-name>OpenSessionInViewFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>
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struts2的标签
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@taglib uri="/struts-tags" prefix="s" %> <s:form action="action_edit" method="post" namespace="/person"> <s:hidden name="person.id"/> 姓名:<s:textfield name="person.name"/><br> <input type="submit" value="发送"/> </s:form> <s:iterator value="persons" > <s:property value="id"/>, <s:property value="name"/> <a href='<s:url action="action_editUI" namespace="/person"><s:param name="person.id" value="id"/></s:url>'>修改</a> </s:iterator>