Spring dual database configuration_PHP tutorial

Sometimes we may use two databases in a project. In order to implement the function of using two or more databases, we need to configure relevant information in Spring.

The first is to add the configuration file conf.properties

<ol class="dp-c">
<li class="alt"><span><span><bean id=</span><span class="string">"propertyConfigurer"</span><span> </span><span class="keyword">class</span><span>=</span><span class="string">"org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"</span><span>>  </span></span></li>
<li><span>        <property name=</span><span class="string">"locations"</span><span>>  </span></li>
<li class="alt"><span>            <list>  </span></li>
<li><span>                <value>classpath:config.properties</value>  </span></li>
<li class="alt"><span>            </list>  </span></li>
<li><span>        </property>  </span></li>
<li class="alt"><span></bean> </span></li>
</ol>

The second is to add the data source (${...} corresponds to the configuration information in conf.properties)

<ol class="dp-c">
<li class="alt"><span><span><!--对应数据A的数据源-->  </span></span></li>
<li><span><bean id=</span><span class="string">"dataSource_A"</span><span> </span><span class="keyword">class</span><span>=</span><span class="string">"org.apache.commons.dbcp.BasicDataSource"</span><span>>  </span></li>
<li class="alt"><span>        <property name=</span><span class="string">"driverClassName"</span><span> value=</span><span class="string">"${A.driver_class}"</span><span> />  </span></li>
<li><span>        <property name=</span><span class="string">"url"</span><span> value=</span><span class="string">"${A.url}"</span><span> />  </span></li>
<li class="alt"><span>        <property name=</span><span class="string">"username"</span><span> value=</span><span class="string">"${A.username}"</span><span> />  </span></li>
<li><span>        <property name=</span><span class="string">"password"</span><span> value=</span><span class="string">"${A.password}"</span><span> />  </span></li>
<li class="alt"><span></bean>  </span></li>
<li><span><!--对应数据库B的数据源-->  </span></li>
<li class="alt"><span><bean id=</span><span class="string">"dataSource_B"</span><span> </span><span class="keyword">class</span><span>=</span><span class="string">"org.apache.commons.dbcp.BasicDataSource"</span><span>>  </span></li>
<li><span>        <property name=</span><span class="string">"driverClassName"</span><span> value=</span><span class="string">"${B.driver_class}"</span><span> />  </span></li>
<li class="alt"><span>        <property name=</span><span class="string">"url"</span><span> value=</span><span class="string">"${B.url}"</span><span> />  </span></li>
<li><span>        <property name=</span><span class="string">"username"</span><span> value=</span><span class="string">"${B.username}"</span><span> />  </span></li>
<li class="alt"><span>        <property name=</span><span class="string">"password"</span><span> value=</span><span class="string">"${B.password}"</span><span> />  </span></li>
<li><span></bean> </span></li>
</ol>

is followed by adding the corresponding sessionFactory:

<ol class="dp-c">
<li class="alt"><span><span><!-- A的sessionFactory -->  </span></span></li>
<li><span>    <bean id=</span><span class="string">"sessionFactory_A"</span><span> </span><span class="keyword">class</span><span>=</span><span class="string">"moretv.commons.spring.hibernate3.AnnotationSessionFactoryBean"</span><span>>  </span></li>
<li class="alt"><span>        <property name=</span><span class="string">"dataSource"</span><span> ref=</span><span class="string">"dataSource_A"</span><span>/>  </span></li>
<li><span>    </bean>  </span></li>
<li class="alt"><span><!-- B的sessionFactory -->  </span></li>
<li><span>    <bean id=</span><span class="string">"sessionFactory_B"</span><span> </span><span class="keyword">class</span><span>=</span><span class="string">"moretv.commons.spring.hibernate3.AnnotationSessionFactoryBean"</span><span>>  </span></li>
<li class="alt"><span>        <property name=</span><span class="string">"dataSource"</span><span> ref=</span><span class="string">"dataSource_B"</span><span>/>      </span></li>
<li><span>    </bean> </span></li>
</ol>

Sometimes such configuration information appears in the dao layer in the project:

<ol class="dp-c">
<li class="alt"><span><span><bean id = </span><span class="string">"XDao"</span><span> </span><span class="keyword">class</span><span> = </span><span class="string">"xxx.xxx.xDaoImpl"</span><span>>  </span></span></li>
<li><span><property name=</span><span class="string">"sessionFactory"</span><span> ref=</span><span class="string">"sessionFactory"</span><span>></property>  </span></li>
<li class="alt"><span></bean> </span></li>
</ol>

In order to achieve this, two different The database can be changed to

<ol class="dp-c">
<li class="alt"><span><span><span style=</span><span class="string">"font-family:'sans serif', tahoma, verdana, helvetica;font-size:13px;line-height:19px;white-space:normal;background-color:#ffffff;"</span><span>> </span><span style=</span><span class="string">"font-family:'sans serif', tahoma, verdana, helvetica;white-space:normal;background-color:#ffffff;"</span><span>><!--使用A数据库的DAO--></span> <bean id = </span><span class="string">"XDao"</span><span> </span><span class="keyword">class</span><span> = </span><span class="string">"xxx.xxx.xDaoImpl"</span><span>>  </span></span></li>
<li><span><property name=</span><span class="string">"sessionFactory"</span><span> ref=</span><span class="string">"sessionFactory_A"</span><span>></property>  </span></li>
<li class="alt"><span></bean>  </span></li>
<li><span><!--使用B数据库的DAO-->  </span></li>
<li class="alt"><span><bean id = </span><span class="string">"XDao"</span><span> </span><span class="keyword">class</span><span> = </span><span class="string">"xxx.xxx.xDaoImpl"</span><span>>  </span></li>
<li><span><property name=</span><span class="string">"sessionFactory"</span><span> ref=</span><span class="string">"sessionFactory_B"</span><span>></property>  </span></li>
<li class="alt"><span></bean> </span></li>
</ol>

so that dual databases can be realized. . . .

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