struts 2 <-- (contextloaderlistener) --> spring <-- (localsessionfactorybean) --> hibernate
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...
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：
drop table if exists `h3`.`customer`; create table `h3`.`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;
customer.java – 创建客户表对应的一个类。
package com.h3.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.h3.customer.model.customer"
table="customer" catalog="h3">
<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>
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.h3.customer.bo;
import java.util.list;
import com.h3.customer.model.customer;
public interface customerbo{
void addcustomer(customer customer);
list<customer> listcustomer();
}
customerboimpl.java
package com.h3.customer.bo.impl;
import java.util.list;
import com.h3.customer.bo.customerbo;
import com.h3.customer.dao.customerdao;
import com.h3.customer.model.customer;
public class customerboimpl implements customerbo{
customerdao customerdao;
//di via spring
public void setcustomerdao(customerdao customerdao) {
this.customerdao = customerdao;
}
//call dao to save customer
public void addcustomer(customer customer){
customerdao.addcustomer(customer);
}
//call dao to return customers
public list<customer> listcustomer(){
return customerdao.listcustomer();
}
}
customerdao.java
package com.h3.customer.dao;
import java.util.list;
import com.h3.customer.model.customer;
public interface customerdao{
void addcustomer(customer customer);
list<customer> listcustomer();
}
customerdaoimpl.java
package com.h3.customer.dao.impl;
import java.util.list;
import org.springframework.orm.hibernate3.support.hibernatedaosupport;
import com.h3.customer.dao.customerdao;
import com.h3.customer.model.customer;
public class customerdaoimpl extends hibernatedaosupport
implements customerdao{
//add the customer
public void addcustomer(customer customer){
gethibernatetemplate().save(customer);
}
//return all the customers in list
public 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.h3.customer.action;
import java.util.arraylist;
import java.util.date;
import java.util.list;
import com.h3.customer.bo.customerbo;
import com.h3.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 spring
public 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 customer
public string addcustomer() throws exception{
//save it
customer.setcreateddate(new date());
customerbo.addcustomer(customer);
//reload the customer list
customerlist = null;
customerlist = customerbo.listcustomer();
return "success";
}
//list all customers
public string listcustomer() throws exception{
customerlist = customerbo.listcustomer();
return "success";
}
}
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.h3.customer.action.customeraction"> <property name="customerbo" ref="customerbo" /> </bean> <bean id="customerbo" class="com.h3.customer.bo.impl.customerboimpl" > <property name="customerdao" ref="customerdao" /> </bean> <bean id="customerdao" class="com.h3.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.driver jdbc.url=jdbc:mysql://localhost:3306/h3 jdbc.username=root jdbc.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/beans
http://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/beans
http://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/h3/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/beans http://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/h3/customer/spring/customerbean.xml"/> </beans>
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>
<?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>
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>
在浏览器中打开网址 : http://localhost:8080/ssh/listcustomeraction.action
