spring+hibernate的c0p3连接池配置

本文介绍了一个使用Spring框架配置Hibernate的数据源及会话工厂的过程。包括PropertyPlaceholderConfigurer配置、c3p0连接池参数设置、OracleLobHandler处理大对象等细节。

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<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE beans public "-//SPRING//DTD BEAN//EN" 
   "http://www.springframework.org/dtd/spring-beans.dtd"
   <beans> 
           <!-- =========== Start of PERSISTENCE DEFINITIONS ============ -->
 
          <bean id="placeholderConfig" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"
            <property name="location"
                      <value>classpath:init.properties</value> 
                      
            </property> 
          </bean> 
          <bean id="nativeJdbcExtractor" class="org.springframework.jdbc.support.nativejdbc.SimpleNativeJdbcExtractor"/> 

           <bean id="oracleLobHandle" class="org.springframework.jdbc.support.lob.OracleLobHandler" lazy-init="true"
                        <property name="nativeJdbcExtractor"
                                     <ref local="nativeJdbcExtractor"/> 
                        </property> 
           </bean> 
              <bean id="dataSource"  class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"
                
                <property name="driverClass"
                        <value>${datasource.driverClassName}</value> 
                </property> 
                <property name="jdbcUrl"
                        <value>${datasource.url}</value> 
                </property> 
                                
                <property name="properties"
                        <props> 
                                <prop key="c3p0.minPoolSize">${hibernate.c3p0.minPoolSize}</prop> 
                                <prop key="hc3p0.maxPoolSize">${hibernate.c3p0.maxPoolSize}</prop> 
                                <prop key="hc3p0.timeout">${hibernate.c3p0.timeout}</prop> 
                                <prop key="c3p0.max_statement">${hibernate.c3p0.max_statement}</prop> 
                                <prop key="c3p0.testConnectionOnCheckout">true</prop> 
                                <prop key="user">${datasource.username}</prop> 
                <prop key="password">${datasource.password}</prop> 
                                
                        </props> 
                </property> 
        </bean> 
        
        <!-- Hibernate SessionFactory --> 
        <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"
                <property name="dataSource"
                        <ref local="dataSource"/> 
                </property> 
                <property name="lobHandler"><ref local="oracleLobHandle"/></property> 
                <property name="mappingResources"
                        
                    <list>        
                            <value>com/cs2c/oa2/pojo/Testfile.hbm.xml</value>                                               
                    </list> 
                </property> 
                
                <property name="hibernateProperties"
                      <props> 
                            <prop key="hibernate.cglib.use_reflection_optimizer">${hibernate.cglib.use_reflection_optimizer}</prop> 
                            <prop key="hibernate.connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</prop> 
                            <prop key="hibernate.dialect">${hibernate.dialect}</prop> 
                            <prop key="hibernate.default_schema">${hibernate.default_schema}</prop> 
                            <prop key="hibernate.show_sql">${hibernate.show_sql}</prop> 
                       </props> 
                </property> 
        </bean> 
        
        
                
        <bean id="test" class="com.cs2c.oa2.test.TestHibernate"
        <property name="sessionFactory">      
                        <ref bean="sessionFactory"/> 
        </property>  
    </bean> 
    
   </beans> 

在配置的时候  cp30的属性的名字必须是  ''driverClass'  ,  'jdbcUrl',  'user'  ,  'password'  而  <property  name="properties">的名字也必须是“properties”,另外cp30配置文件的属性名也都是诸如:"c3p0.minPoolSize"、"hc3p0.maxPoolSize"等等, 
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