框架技术--S2SH如何引入多个数据源
在使用S2SH框架中如何配置多个数据源。
简述思路：
- 因为hibernate是与我们底层数据库做交互的框架，所以我们要将多个库的连接信息，录入到*hibernate.cfg.xml配置文件中。
- 因为hibernate是有spring托管，所以还要在spring的applicationContext.xml中进行配置，告诉spring要管理哪些数据源、怎么管理（事物）。
- 在dao层查询数据库时，配置相应信息告诉dao要查询哪一个库的信息。
代码如下：
这里我将两个数据源分别配置2个hibernate的xml，如下
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<!-- Generated by MyEclipse Hibernate Tools. -->
<hibernate-configuration>
<session-factory>
<property name="connection.url">
jdbc:mysql://192.168.200.27:3306/liveEpg?useUnicode=true&characterEncoding=UTF-8
</property>
<property name="connection.username">root</property>
<property name="connection.password">root</property>
<property name="connection.driver_class">
com.mysql.jdbc.Driver
</property>
<!--
解决由于长时间没人操作系统，导致hibernate与mysql连接超时，导致连接断开的问题。begin
参考网站使用c3p0进行一下配置：
http://blog.csdn.net/nethibernate/article/details/6658855
-->
<!-- c3p0在我们使用的Hibernate版本中自带，不用下载，直接使用 -->
<property name="hibernate.connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>
<property name="hibernate.c3p0.min_size">5</property>
<property name="hibernate.c3p0.max_size">20</property>
<property name="hibernate.c3p0.timeout">1800</property>
<property name="hibernate.c3p0.max_statements">50</property>
<!-- 下面这句很重要，后面有解释 -->
<property name="hibernate.c3p0.testConnectionOnCheckout">true</property>
<!-- 解决由于长时间没人操作系统，导致hibernate与mysql连接超时，导致连接断开的问题。end -->
<mapping class="com.gp.bean.TUser" />
<mapping class="com.haier.bean.TestPortal" />
<mapping class="com.haier.bean.AdvInfoDetailDto" />
<mapping class="com.haier.bean.AdvInfoDto" />
<mapping class="com.haier.bean.AdvRuleBusinessDto" />
<mapping class="com.haier.bean.AdvRuleDto" />
<mapping class="com.haier.bean.Channel_infoDto" />
<mapping class="com.haier.bean.AdvTimeDto" />
<mapping class="com.haier.bean.AdvCityDto" />
<mapping class="com.haier.bean.AdvProvinceDto" />
<mapping class="com.haier.bean.AdMenuDto" />
<mapping class="com.haier.bean.AdvNumDto" />
<mapping class="com.haier.bean.MacForTestDto" />
<mapping class="com.haier.bean.AdvInfoDetailHisDto" />
<mapping class="com.haier.bean.AdvInfoHisDto" />
<mapping class="com.haier.bean.AdvRuleHisDto" />
<mapping class="com.haier.bean.MaterialDto" />
<mapping class="com.haier.bean.AdvLogDto" />
</session-factory>
</hibernate-configuration>
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<!-- Generated by MyEclipse Hibernate Tools. -->
<hibernate-configuration>
<session-factory>
<property name="connection.url">
jdbc:mysql://192.157.151.56:3306/haierdb?useUnicode=true&characterEncoding=UTF-8
</property>
<property name="connection.username">permitdbuser</property>
<property name="connection.password">permitdbpwd</property>
<property name="connection.driver_class">
com.mysql.jdbc.Driver
</property>
<!--
解决由于长时间没人操作系统，导致hibernate与mysql连接超时，导致连接断开的问题。begin
参考网站使用c3p0进行一下配置：
http://blog.csdn.net/nethibernate/article/details/6658855
-->
<!-- c3p0在我们使用的Hibernate版本中自带，不用下载，直接使用 -->
<property name="hibernate.connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>
<property name="hibernate.c3p0.min_size">5</property>
<property name="hibernate.c3p0.max_size">20</property>
<property name="hibernate.c3p0.timeout">1800</property>
<property name="hibernate.c3p0.max_statements">50</property>
<!-- 下面这句很重要，后面有解释 -->
<property name="hibernate.c3p0.testConnectionOnCheckout">true</property>
<!-- 解决由于长时间没人操作系统，导致hibernate与mysql连接超时，导致连接断开的问题。end -->
<mapping class="com.haier.bean.Ad_admin_rightDto" />
<mapping class="com.haier.bean.Ad_op_code_rightDto" />
<mapping class="com.haier.bean.Ad_admin_userDto" />
</session-factory>
</hibernate-configuration>
在spring中配置信息如下：
<?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: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-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 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd"> <context:component-scan base-package="com"></context:component-scan> <context:component-scan base-package="com.haier"></context:component-scan> <!-- dataSource注入到sessionFactory --> <!-- liveEpg数据源 start --> <bean id="liveEpgsessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> <property name="configLocation" value="classpath:liveEpg_hibernate.cfg.xml"></property> </bean> <bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate"> <property name="sessionFactory" ref="liveEpgsessionFactory"></property> </bean> <bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <property name="sessionFactory"> <ref bean="liveEpgsessionFactory" /> </property> </bean> <tx:advice id="txAdvice" transaction-manager="txManager"> <tx:attributes> <tx:method name="query*" read-only="true" /> <tx:method name="search*" read-only="true" /> <tx:method name="find*" read-only="true" /> <tx:method name="get*" read-only="true"/> <tx:method name="show*" read-only="true"/> <tx:method name="save*" /> <tx:method name="update*" /> <tx:method name="delete*" /> <tx:method name="add*" /> <tx:method name="generate*"/> <tx:method name="verify*"/> <tx:method name="check*"/> </tx:attributes> </tx:advice> <!-- liveEpg数据源 END --> <!-- uas数据源BEGIN --> <bean id="uasEpgsessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> <property name="configLocation" value="classpath:uas_hibernate.cfg.xml"></property> </bean> <bean id="uasHibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate"> <property name="sessionFactory" ref="uasEpgsessionFactory"></property> </bean> <bean id="uasTxManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <property name="sessionFactory"> <ref bean="uasEpgsessionFactory" /> </property> </bean> <tx:advice id="uasTxAdvice" transaction-manager="uasTxManager"> <tx:attributes> <tx:method name="query*" read-only="true" /> <tx:method name="search*" read-only="true" /> <tx:method name="find*" read-only="true" /> <tx:method name="get*" read-only="true"/> <tx:method name="show*" read-only="true"/> <tx:method name="save*" /> <tx:method name="update*" /> <tx:method name="delete*" /> <tx:method name="add*" /> <tx:method name="generate*"/> <tx:method name="verify*"/> <tx:method name="check*"/> </tx:attributes> </tx:advice> <!-- uas数据源END --> <aop:config> <aop:pointcut expression="execution(* com.gp.service.*.*(..))" id="serviceMethod" /> <aop:advisor advice-ref="txAdvice" pointcut-ref="serviceMethod" /> </aop:config> <aop:config> <aop:pointcut expression="execution(* com.haier.service.*.*(..))" id="haierServiceMethod" /> <aop:advisor advice-ref="txAdvice" pointcut-ref="haierServiceMethod" /> <aop:advisor advice-ref="uasTxAdvice" pointcut-ref="haierServiceMethod" /> </aop:config> <!-- 初始化广告信息 --> <bean id="getChannelInfo" class="com.haier.timer.GetChannelInfo" lazy-init="false" scope="singleton" init-method="execute"> </bean> </beans>
在dao层进行查询时，代码如下，注意第30行要指定数据源的名字。
package com.haier.dao.impl;
import java.util.ArrayList;
import java.util.List;
import javax.annotation.Resource;
import org.hibernate.Hibernate;
import org.hibernate.Query;
import org.hibernate.SQLQuery;
import org.hibernate.Session;
import org.springframework.orm.hibernate3.HibernateTemplate;
import org.springframework.stereotype.Repository;
import com.haier.bean.Ad_admin_rightDto;
import com.haier.bean.Ad_admin_userDto;
import com.haier.dao.Ad_admin_rightDao;
import com.haier.util.PageUtil;
import com.haier.vo.PageVo;
@Repository("ad_admin_rightDao")
public class Ad_admin_rightDaoImpl implements Ad_admin_rightDao {
private HibernateTemplate uasHibernateTemplate;
public HibernateTemplate getHibernateTemplate() {
return uasHibernateTemplate;
}
@Resource(name = "uasHibernateTemplate")
public void setHibernateTemplate(HibernateTemplate hibernateTemplate) {
this.uasHibernateTemplate = hibernateTemplate;
}
@Override
public void delete(Ad_admin_rightDto ad_admin_rightDto) throws Exception {
Session session = getHibernateTemplate().getSessionFactory()
.getCurrentSession();
session.delete(ad_admin_rightDto);
}
@Override
public List<Ad_admin_rightDto> find() throws Exception {
Session session = getHibernateTemplate().getSessionFactory()
.getCurrentSession();
Query query = session.createQuery(" from Ad_admin_rightDto aard");
List<Ad_admin_rightDto> aardList = query.list();
return aardList;
}
@Override
public void update(Ad_admin_rightDto ad_admin_rightDto) throws Exception {
Session session = getHibernateTemplate().getSessionFactory()
.getCurrentSession();
session.update(ad_admin_rightDto);
}
@Override
public void save(Ad_admin_rightDto ad_admin_rightDto) throws Exception {
Session session = getHibernateTemplate().getSessionFactory()
.getCurrentSession();
session.save(ad_admin_rightDto);
}
/**
* 生成新的roleId
*
* @return
* @throws Exception
*/
public List getNewRoleId() throws Exception {
Session session = getHibernateTemplate().getSessionFactory()
.getCurrentSession();
StringBuffer sb = new StringBuffer();
sb.append("select max(role_id),max(id) from ad_admin_right ");
SQLQuery query = session.createSQLQuery(sb.toString());
List roleList = query.list();
return roleList;
}
/**
* 根据条件查询
*
* @param advId
* @return
*/
public PageVo findByConditions(String conditions, PageVo pageVo)
throws Exception {
Session session = getHibernateTemplate().getSessionFactory()
.getCurrentSession();
StringBuffer sb = new StringBuffer();
sb.append("select id, role_id, user_role, opcode, parent_opcode, system_type"
+ " from ad_admin_right aau where 1=1");
sb.append(conditions);
if (pageVo != null) {
PageUtil.generateConditions(pageVo, sb);
}
SQLQuery query = session.createSQLQuery(sb.toString());
List<Object[]> aldList = new ArrayList<Object[]>();
List<Ad_admin_rightDto> adRightList = new ArrayList<Ad_admin_rightDto>();
aldList = query.list();
Ad_admin_rightDto ad_admin_rightDto;
for (int i = 0; i < aldList.size(); i++) {
ad_admin_rightDto = new Ad_admin_rightDto();
ad_admin_rightDto.setId((Integer) (aldList.get(i))[0]);
ad_admin_rightDto.setRole_id((Integer) (aldList.get(i))[1]);
ad_admin_rightDto.setUser_role((String) (aldList.get(i))[2]);
ad_admin_rightDto.setOpcode((Integer) (aldList.get(i))[3]);
ad_admin_rightDto.setParent_opcode((Integer) (aldList.get(i))[4]);
ad_admin_rightDto.setSystem_type((Integer) (aldList.get(i))[5]);
adRightList.add(ad_admin_rightDto);
}
if (pageVo != null) {
PageUtil.generatePageNum(pageVo);
} else {
pageVo = new PageVo();
}
pageVo.setAdvInfoVoList(adRightList);
return pageVo;
}
}