spring+ibatis配置多数据源

来源:互联网 发布:香港理工大学gpa算法 编辑:程序博客网 时间:2024/05/22 14:14

说明:最近因为项目需要,经过多方努力和救助,终于实现了spring+ibatis的动态数据源切换配置,在此贴出,以供大家参考,同时希望大家多提意见……

下面是详细代码:
     1.  spring的applicationContext.xml配置文件:
a.  属性文件配置:
<bean id="propertyConfig"  class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
  <property name="location">
   <value>    classpath:resource/DataSourceConfig.properties
   </value>
  </property>
 </bean>

b.  DataSource: C3P0连接池:
【注意:由于存在多数据源,故此步按需要多次配置
<bean id="dataSource"
  class="com.mchange.v2.c3p0.ComboPooledDataSource"
  destroy-method="close">
  <property name="driverClass" value="${gpt.driverClassName}" />
  <property name="jdbcUrl" value="${gpt.url}" />
  <property name="user" value="${gpt.username}" />
  <property name="password" value="${gpt.password}" />
  <property name="minPoolSize" value="${gpt.minPoolSize}" />
  <property name="acquireRetryAttempts"
   value="${gpt.acquireRetryAttempts}" />
  <property name="acquireIncrement"
   value="${gpt.acquireIncrement}" />
  <property name="maxIdleTime" value="${gpt.maxIdleTime}" />
  <property name="initialPoolSize" value="${gpt.initialPoolSize}" />
  <property name="maxPoolSize" value="${gpt.maxPoolSize}" />
  <property name="idleConnectionTestPeriod"
   value="${gpt.idleConnectionTestPeriod}" />
 </bean>

c.  spring事务管理配置:
【红色标记处,多个数据源配置多个】
<bean id="autoProxyCreator"  class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">
  <property name="beanNames">
   <value>*Service</value>
  </property>
  <property name="interceptorNames">
   <list><value>transactionInterceptor1</value>   <value>transactionInterceptor2</value>   <value>transactionInterceptor3</value>
   </list>
  </property>
 </bean>
<!-- 标记段重复配置,具体看自己需要 start -->
<bean id="transactionManager"  class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
  <property name="dataSource" ref="dataSource" />
 </bean>
 <bean id="transactionInterceptor1"  class="org.springframework.transaction.interceptor.TransactionInterceptor">
  <property name="transactionManager" ref="transactionManager" />
  <property name="transactionAttributes">
   <props>
    <prop key="insert*">PROPAGATION_REQUIRED</prop>
    <prop key="delete*">PROPAGATION_REQUIRED</prop>
    <prop key="update*">PROPAGATION_REQUIRED</prop>
    <prop key="do*">PROPAGATION_REQUIRED</prop>
   </props>
  </property>
 </bean>
<!-- end -->

d.  ibatis sql map 配置:
【同理,有多少个数据源就配置多少遍】
<bean id="sqlMapClient"  class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">
  <property name="dataSource" ref="dataSource" />
  <property name="configLocation"   value="classpath:com/sqlmap/sqlmap-config.xml" />

就这样,spring配置文件就准备好了。
 </bean>

 

[color=blue][/color][size=large]spring+struts+ibatis 动态数据源配置 (二)

经过上一步对spring配置文件的配置,接下来我们新建一个接口文件:
public interface IBaseSqlMapClientDaoSupport { 
 
 public void choseSqlClient(String name);
}
同时也新建一个实现类:
public class BaseSqlMapClientDaoSupport extends SqlMapClientDaoSupport implements ApplicationContextAware {
 protected ApplicationContext context;
 protected ApplicationContext getContext() {
  // return WebApplicationContextUtils
  // .getWebApplicationContext(ServletActionContext
  // .getServletContext());
  return context;
 }
 public void choseSqlClient(String name) {
  SqlMapClient client = (SqlMapClient) getContext().getBean(name);
  setSqlMapClientTemplate(new SqlMapClientTemplate(client));
  afterPropertiesSet();
 }
 public void setApplicationContext(ApplicationContext context) throws BeansException {
  this.context = context;
 }
}
到此为止,值得注意的地方都配置完毕,最后就是我们DAO接口和实现类的配置了,在这里我就简单的贴下代码:
public interface DemoDAO extends IBaseSqlMapClientDaoSupport{
...操作方法...
}
public class DemoDaoImpl extends BaseSqlMapClientDaoSupport implements DemoDAO {
...操作方法...
比如
public void addDemo(DemoDO demoDo) {
     choseSqlClient("设置指定的数据源");【这步最好放到server实现类里面,在你要调用具体的Dao的前面设置即可。】
      getSqlMapClientTemplate.insert("..",demoDo);
}
}