Maven + Spring + Hibernate + Struts2 整合第二部分

建立Service层的接口以及实现，在实际使用过程中，可能有时候在比较简单的情况下会省略Service层的接口。但本实例主要做个演示。

package localhost.login.service;

import java.util.List;

import localhost.login.domain.User;

public interface UserService {
	public String addUser(User user);
	public List<User> findUserByName(String name);
	public List<User> listAll();
}

它的实现类代码：

package localhost.login.service;

import java.util.List;

import localhost.login.dao.UserDAO;
import localhost.login.domain.User;

public class UserServiceImpl implements UserService{
	private UserDAO userDAO;

	public UserDAO getUserDAO() {
		return userDAO;
	}

	public void setUserDAO(UserDAO userDAO) {
		this.userDAO = userDAO;
	}

	@Override
	public String addUser(User user) {
		return userDAO.addUser(user);
	}

	@Override
	public List<User> findUserByName(String name) {
		return userDAO.findUserByName(name);
	}

	@Override
	public List<User> listAll() {
		return userDAO.listAll();
	}
	
}

下来我们建立Spring的配置文件applicationContext.xml,注意这个目录可以在任意目录下，但我们现在把它放在src/目录下。

<?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:util="http://www.springframework.org/schema/util"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
      http://www.springframework.org/schema/util
      http://www.springframework.org/schema/util/spring-util-2.0.xsd">
      
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    	<property name="driverClassName">
    		<value>com.mysql.jdbc.Driver</value>
    	</property>
    	<property name="url">
    		<value>jdbc:mysql://localhost:3306/test</value>
    	</property>
    	<property name="username" value="root"/>
    	<property name="password" value="root" />
    </bean>
    
    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
    	<property name="dataSource">
    		<ref bean="dataSource"/>
    	</property>
    	
    	<property name="mappingLocations">
    		<value>localhost/login/domain/User.hbm.xml</value>
    	</property>
    	
    	<property name="hibernateProperties">
    		<props>
    			<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
    			<prop key="hibernate.show_sql">true</prop>
    		</props>
    	</property>
    </bean>
    
    <bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">
    	<property name="sessionFactory">
    		<ref bean="sessionFactory"/>
    	</property>
    </bean>
    
    <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
    	<property name="sessionFactory">
    		<ref bean="sessionFactory"/>
    	</property>
    </bean>
    
    <bean id="service" class="org.springframework.transaction.interceptor.TrasactionProxyFactoryBean" abstract="true">
    	<property name="trasactionManager">
    		<ref bean="trasactionManager"/>
    	</property>
    	
    	<property name="trasactionAttributes">
    		<props>
    			<prop key="add">PROPAGATION_REQUIRED</prop>
    			<prop key="find*">PROPAGATION_REQUIRED,readOnly</prop>
    		</props>
    	</property>
    </bean>
    
    <bean id="userDAO" class="localhost.login.dao.UserDAOImpl">
    	<property name="hibernateTemplate">
    		<ref bean="hibernateTemplate"/>
    	</property>
    </bean>
    
    <bean id="userService" class="localhost.login.service.UserServiceImpl">
    	<property name="userDAO">
    		<ref bean="userDAO"/>
    	</property>
    </bean>   
    
    
</beans>

同时我们可以按传统的方式再建立一个hibernate.cfg.xml，把它作为一个属性配置在applicationContext.xml里面的sessionFactory,但可能大家都觉得在Java Web开发中配置文件较多，咱们再这里就写到一块。