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新的系統(tǒng)有可能會要用到遺留系統(tǒng)的數(shù)據(jù)，所以有時就會要連接兩個以上的數(shù)據(jù)庫。
那么怎么來處理這一問題呢？
原理：創(chuàng)建類似的文件（兩個數(shù)據(jù)庫就有兩個類似用spring+hibernate的配置文件）
下面以webwork+spring+hibernate來說明。
1）web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns="http://java.sun.com/xml/ns/j2ee"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4">

<display-name>shipment</display-name>

<context-param>

<param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name>

<param-value>messages</param-value>

</context-param>

<context-param>

<param-name>contextConfigLocation</param-name>

<param-value>

/WEB-INF/applicationContext*.xml

/WEB-INF/action-servlet.xml

</param-value>

</context-param>

<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

</listener>

<listener-class>com.opensymphony.xwork.spring.SpringObjectFactoryListener</listener-class>

</listener>

<servlet-name>action</servlet-name>

<servlet-class>com.opensymphony.webwork.dispatcher.ServletDispatcher</servlet-class>

<load-on-startup>1</load-on-startup>

</servlet>

<servlet-mapping>

<servlet-name>action</servlet-name>

<url-pattern>*.html</url-pattern>

</servlet-mapping>

<welcome-file-list>

<welcome-file>login.jsp</welcome-file>

</welcome-file-list>

</web-app>

2) xwork.xml用來配置action

<!DOCTYPE xwork PUBLIC "-//OpenSymphony Group//XWork 1.0//EN"

"http://www.opensymphony.com/xwork/xwork-1.0.dtd">

<xwork>

<interceptor-stack name="defaultExceptionStack">

<interceptor-ref name="defaultStack"/>

<interceptor-ref name="exceptionHandler"/>

</interceptor-stack>

</interceptors>

<default-interceptor-ref name="defaultExceptionStack"/>

<global-results>

<result name="dataAccessFailure">dataAccessFailure.jsp</result>

</global-results>

<result name="success" type ="dispatcher">shipmentv.jsp</result>

<result name="failuer" type="dispatcher">login.jsp</result>

</action>

</package>

</xwork>

3)action-servlet.xml配置action與調(diào)用DAO

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"

"http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

</bean>

</beans>

4)applicationContext.xml配置事務(wù)管理　

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"

"http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

</bean>

<!-- Transaction template for Managers, from:

http://blog.exis.com/colin/archives/2004/07/31/concise-transaction-definitions-spring-11/ -->

<bean id="txProxyTemplate" abstract="true"

class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">

<props>

<prop key="save*">PROPAGATION_REQUIRED</prop>

<prop key="remove*">PROPAGATION_REQUIRED</prop>

<prop key="*">PROPAGATION_REQUIRED,readOnly</prop>

</props>

</property>

</bean>

</bean>

</property>

</bean>

</beans>

5)applicationContext-hibernate.xml配置hibernate

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"

"http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

</bean>

<list>

<value>com/legend/shipment/TworkCost.hbm.xml</value>

<value>com/legend/shipment/TworkConfig.hbm.xml</value>

</list>

</property>

<props>

<prop key="hibernate.dialect">org.hibernate.dialect.SQLServerDialect</prop>

</props>

</property>

</bean>

</bean>

</bean>

</beans>

6)jdbc.properties數(shù)據(jù)庫連接信息

jdbc.driverClassName=com.microsoft.jdbc.sqlserver.SQLServerDriver

jdbc.url=jdbc:microsoft:sqlserver://192.168.1.6:1433;DatabaseName=dg_labour;SelectMethod=cursor;

jdbc.username=sa

jdbc.password=test

　　如果要連接兩個數(shù)據(jù)庫的話，那么就加多一個類似applicationContext-hibernate.xml文件，一個類似applicationContext.xml的文件，并在jdbc.properties文件中添加另一個數(shù)據(jù)庫的連接信息。當然要作小的修改。比如說：你在applicationContext-another.xml加了一個名為workManager的事務(wù)代理。你想把它添加到loginAction中去，那么就把action_server.xml文件修改成

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"

"http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

</bean>

</beans>

在java程序中就可以通過setWorkManager()方法自己設(shè)置了，也就可以在LoginAction類中引用了。
可能說的不夠詳細，但提供了一個思路。

posted on 2005-09-08 16:10 Harryson 閱讀(5316) 評論(0) 編輯收藏所屬分類: Hibernate 、Spring

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