Struts2+Spring+hibernate整合实例

参见集成步骤总结：

1. 获取所有的依赖库(很多)。
2. 注册 Spring 的 ContextLoaderListener 来整合 Struts2 和 Spring。
3. 使用 Spring 的 LocalSessionFactoryBean 来集成 Spring 和 Hibernate。
4. 完成所有连接。

请参阅它们之的关系：

Struts 2 <-- (ContextLoaderListener) --> Spring <-- (LocalSessionFactoryBean) --> Hibernate

这将是一个很长的教程，相关解释并不是很多，请务必阅读上述2篇文章的详细情况说明以方面学习。

这将要创建一个客户页面，以添加客户和列表的自定义函数。前端使用Struts2显示，Spring作为依赖注入引擎，而 Hibernate 用来执行数据库操作。让我们开始...

1. 工程文件夹结构

在本章中，我们创建一个 ssh 的web工程，工程的目录结构如下图所示：

2. MySQL表结构结构

客户(customer)表脚本。

DROP TABLE IF EXISTS `yiibai`.`customer`;CREATE TABLE  `yiibai`.`customer` (  `CUSTOMER_ID` bigint(20) unsigned NOT NULL AUTO_INCREMENT,  `NAME` varchar(45) NOT NULL,  `ADDRESS` varchar(255) NOT NULL,  `CREATED_DATE` datetime NOT NULL,  PRIMARY KEY (`CUSTOMER_ID`)) ENGINE=InnoDB AUTO_INCREMENT=17 DEFAULT CHARSET=utf8;

3. Hibernate相关配置

只有模型和映射文件是必需的，因为这里要用Spring处理Hibernate配置。

Customer.java – 创建客户表对应的一个类。

package com.yiibai.customer.model;import java.util.Date;public class Customer implements java.io.Serializable {private Long customerId;private String name;private String address;private Date createdDate;//getter and setter methods}

Customer.hbm.xml – Hibernate的客户映射文件。

<?xml version="1.0"?><!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN""http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"><!-- Generated 20 Julai 2010 11:40:18 AM by Hibernate Tools 3.2.5.Beta --><hibernate-mapping>    <class name="com.yiibai.customer.model.Customer" table="customer" catalog="yiibai">        <id name="customerId" type="java.lang.Long">            <column name="customer_id" />            <generator class="identity" />        </id>        <property name="name" type="string">            <column name="name" length="45" not-null="true" />        </property>        <property name="address" type="string">            <column name="address" not-null="true" />        </property>        <property name="createdDate" type="timestamp">            <column name="create_date" length="19" not-null="true" />        </property>    </class></hibernate-mapping>

5. Struts2相关

实现了 Bo 和 DAO 设计模式。所有Bo和DAO将由Spring Spring bean配置文件注入。在DAO中，让它扩展Spring的HibernateDaoSupport来集成 Spring 和 Hibernate。

CustomerBo.java

package com.yiibai.customer.bo;import java.util.List;import com.yiibai.customer.model.Customer; public interface CustomerBo{void addCustomer(Customer customer);List<Customer> listCustomer();}

CustomerBoImpl.java

package com.yiibai.customer.bo.impl;import java.util.List;import com.yiibai.customer.bo.CustomerBo;import com.yiibai.customer.dao.CustomerDAO;import com.yiibai.customer.model.Customer; public class CustomerBoImpl implements CustomerBo{CustomerDAO customerDAO;//DI via Springpublic void setCustomerDAO(CustomerDAO customerDAO) {this.customerDAO = customerDAO;}//call DAO to save customerpublic void addCustomer(Customer customer){customerDAO.addCustomer(customer);}//call DAO to return customerspublic List<Customer> listCustomer(){return customerDAO.listCustomer();}}

CustomerDAO.java

package com.yiibai.customer.dao;import java.util.List;import com.yiibai.customer.model.Customer; public interface CustomerDAO{void addCustomer(Customer customer);List<Customer> listCustomer();}

CustomerDAOImpl.java

package com.yiibai.customer.dao.impl;import java.util.List;import org.springframework.orm.hibernate3.support.HibernateDaoSupport;import com.yiibai.customer.dao.CustomerDAO;import com.yiibai.customer.model.Customer; public class CustomerDAOImpl extends HibernateDaoSupport     implements CustomerDAO{//add the customerpublic void addCustomer(Customer customer){getHibernateTemplate().save(customer);}//return all the customers in listpublic List<Customer> listCustomer(){return getHibernateTemplate().find("from Customer");}}

CustomerAction.java – Struts2 的动作不再需要扩展ActionSupport，它将由 Spring 来处理。

package com.yiibai.customer.action;import java.util.ArrayList;import java.util.Date;import java.util.List;import com.yiibai.customer.bo.CustomerBo;import com.yiibai.customer.model.Customer;import com.opensymphony.xwork2.ModelDriven; public class CustomerAction implements ModelDriven{Customer customer = new Customer();List<Customer> customerList = new ArrayList<Customer>();CustomerBo customerBo;//DI via Springpublic void setCustomerBo(CustomerBo customerBo) {this.customerBo = customerBo;}public Object getModel() {return customer;}public List<Customer> getCustomerList() {return customerList;}public void setCustomerList(List<Customer> customerList) {this.customerList = customerList;}//save customerpublic String addCustomer() throws Exception{//save itcustomer.setCreatedDate(new Date());customerBo.addCustomer(customer); //reload the customer listcustomerList = null;customerList = customerBo.listCustomer();return "success";}//list all customerspublic String listCustomer() throws Exception{customerList = customerBo.listCustomer();return "success";}}

6. Spring相关配置

几乎所有的配置都是在这里完成是由Spring专门来整合。

CustomerBean.xml – 声明 Spring 的 bean：Action, BO 和 DAO.

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">  <bean id="customerAction" class="com.yiibai.customer.action.CustomerAction"><property name="customerBo" ref="customerBo" /></bean><bean id="customerBo" class="com.yiibai.customer.bo.impl.CustomerBoImpl" ><property name="customerDAO" ref="customerDAO" /></bean>   <bean id="customerDAO" class="com.yiibai.customer.dao.impl.CustomerDAOImpl" ><property name="sessionFactory" ref="sessionFactory" /></bean> </beans>

database.properties – 声明数据库详细信息

jdbc.driverClassName=com.mysql.jdbc.Driverjdbc.url=jdbc:mysql://localhost:3306/yiibaijdbc.username=rootjdbc.password=password

DataSource.xml – 创建一个数据库源的Bean 

<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-2.5.xsd">  <bean    class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">   <property name="location">     <value>WEB-INF/classes/config/database/properties/database.properties</value>   </property></bean>   <bean id="dataSource"          class="org.springframework.jdbc.datasource.DriverManagerDataSource"><property name="driverClassName" value="${jdbc.driverClassName}" /><property name="url" value="${jdbc.url}" /><property name="username" value="${jdbc.username}" /><property name="password" value="${jdbc.password}" />  </bean> </beans>

HibernateSessionFactory.xml – 创建一个SessionFactory Bean来集成Spring和Hibernate。

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-2.5.xsd"> <!-- Hibernate session factory --><bean id="sessionFactory"     class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">     <property name="dataSource">      <ref bean="dataSource"/>    </property>     <property name="hibernateProperties">       <props>         <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>         <prop key="hibernate.show_sql">true</prop>       </props>    </property>     <property name="mappingResources"><list>          <value>com/yiibai/customer/hibernate/Customer.hbm.xml</value></list>    </property> </bean></beans>

SpringBeans.xml – 创建一个核心 Spring 的 bean 配置文件，作为中央的 bean 管理层。

<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-2.5.xsd"><!-- Database Configuration --><import resource="config/spring/DataSource.xml"/><import resource="config/spring/HibernateSessionFactory.xml"/> <!-- Beans Declaration --><import resource="com/yiibai/customer/spring/CustomerBean.xml"/> </beans>

7. JSP 页面

JSP页面来显示使用 Struts2 标签的元素。

customer.jsp

<%@ taglib prefix="s" uri="/struts-tags" %><html><head></head> <body><h1>Struts 2 + Spring + Hibernate integration example</h1><h2>Add Customer</h2><s:form action="addCustomerAction" >  <s:textfield name="name" label="Name" value="" />  <s:textarea name="address" label="Address" value="" cols="50" rows="5" />  <s:submit /></s:form><h2>All Customers</h2><s:if test="customerList.size() > 0"><table border="1px" cellpadding="8px"><tr><th>Customer Id</th><th>Name</th><th>Address</th><th>Created Date</th></tr><s:iterator value="customerList" status="userStatus"><tr><td><s:property value="customerId" /></td><td><s:property value="name" /></td><td><s:property value="address" /></td><td><s:date name="createdDate" format="dd/MM/yyyy" /></td></tr></s:iterator></table></s:if><br/><br/></body></html>

8. struts.xml

<?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> <constant name="struts.devMode" value="true" /> <package name="default" namespace="/" extends="struts-default"><action name="addCustomerAction" class="customerAction" method="addCustomer" >    <result name="success">pages/customer.jsp</result></action><action name="listCustomerAction"class="customerAction" method="listCustomer" >    <result name="success">pages/customer.jsp</result></action></package></struts>

9. Struts 2 + Spring

要集成Struts2和Spring，只需注册ContextLoaderListener监听器类，定义一个“contextConfigLocation”参数要求Spring容器来解析“SpringBeans.xml”，而不使用默认的“applicationContext.xml”。

web.xml

<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" ><web-app>  <display-name>Struts 2 Web Application</display-name>    <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>   <context-param><param-name>contextConfigLocation</param-name><param-value>/WEB-INF/classes/SpringBeans.xml</param-value>  </context-param>    <listener>    <listener-class>      org.springframework.web.context.ContextLoaderListener    </listener-class>  </listener>  </web-app>

10. 运行实例

在浏览器中打开网址 : http://localhost:8080/ssh/listCustomerAction.action