Spring+Hibernate 配置和使用c3p0和proxool连接

其实原理都是一样就是用一个继承了实现javax.sql.DataSource的DataSource类

在Spring中用bean来组装,管理来配置其属性提供给sessionFactory来组装

API上可能属性没有写出来但是可以看到方法要想真正了解还是要看源代码中的详细属性

比如在cp30中这个具体的DataSource是

com.mchange.v2.c3p0.ComboPooledDataSource
他的源代码中有以下片段：

.............

public StringgetDriverClass()

{ return dmds.getDriverClass();}

public void setDriverClass(StringdriverClass) throws PropertyVetoException

{

dmds.setDriverClass(driverClass);

// System.err.println("settingdriverClass:"+driverClass);

}

public StringgetJdbcUrl()

{

// System.err.println("gettingjdbcUrl:"+dmds.getJdbcUrl());

return dmds.getJdbcUrl();

}

public void setJdbcUrl(StringjdbcUrl)

{

dmds.setJdbcUrl(jdbcUrl);

this .resetPoolManager( false );

// System.err.println("settingjdbcUrl:"+jdbcUrl+"[dmds@"+C3P0ImplUtils.identityToken(dmds)+"]");

// if(jdbcUrl==null)

// newException("***NULLSETTER***").printStackTrace();

}

public PropertiesgetProperties()

{

// System.err.println("gettingproperties:"+dmds.getProperties());

return dmds.getProperties();

}

public void setProperties(Propertiesproperties)

{

// System.err.println("settingproperties:"+properties);

dmds.setProperties(properties);

this .resetPoolManager( false );

}

// DriverManagerDataSource"virtualproperties"basedonproperties

public StringgetUser()

{ return dmds.getUser();}

public void setUser(Stringuser)

{

dmds.setUser(user);

this .resetPoolManager( false );

}

public StringgetPassword()

{ return dmds.getPassword();}

public void setPassword(Stringpassword)

{

dmds.setPassword(password);

this .resetPoolManager( false );

................

里面有个property属性的get和set方法

因此在bean中可以对其进行配置

组装到sessionFactory中之后还可以通过hibernateProperties对Hibernate进行一些配置

一 c3p0

beas-config.xml

<? xmlversion="1.0"encoding="UTF-8" ?>

<! DOCTYPEbeansPUBLIC"-//SPRING//DTDBEAN//EN""http://www.springframework.org/dtd/spring-beans.dtd" >

< beans >

<!-- ***********************************************************************

<beanid="dataSource"class="org.springframework.jdbc.datasource.DriverManagerDataSource">

<propertyname="driverClassName">

<value>com.mysql.jdbc.Driver</value>

</property>

<propertyname="url">

<value>jdbc:mysql://localhost:3306/shtest</value>

</property>

<propertyname="username">

</property>

<propertyname="password">

<value>password</value>

</property>

</bean>

************************************************************************ -->

< bean id ="dataSource" class ="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method ="close" >

< property name ="driverClass" >

< value > com.mysql.jdbc.Driver </ value >

</ property >

< property name ="jdbcUrl" >

< value > jdbc:mysql://localhost:3306/shtest </ value >

</ property >

< property name ="properties" >

< props >

< prop key ="c3p0.acquire_increment" > 2 </ prop >

< prop key ="c3p0.idle_test_period" > 200 </ prop >

< prop key ="c3p0.timeout" > 1000 </ prop >

< prop key ="c3p0.max_size" > 100 </ prop >

< prop key ="hibernate.c3p0.max_statements" > 100 </ prop >

< prop key ="hibernate.c3p0.min_size" > 20 </ prop >

< prop key ="user" > root </ prop >

< prop key ="password" > password </ prop >

</ props >

</ property >

</ bean >

< bean id ="sessionFactory" class ="org.springframework.orm.hibernate3.LocalSessionFactoryBean" destroy-method ="close" >

< property name ="dataSource" >

< ref bean ="dataSource" />

</ property >

< property name ="mappingResources" >

< list >

< value > /com/ergal/hibernate/User.hbm.xml </ value >

</ list >

</ property >

< property name ="hibernateProperties" >

< props >

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

< prop key ="hibernate.show_sql" > true </ prop >

< prop key ="hibernate.current_session_context_class" > thread </ prop >

</ props >

</ property >

</ bean >

< bean id ="userDao" class ="com.ergal.hibernate.UserDao" >

< property name ="sessionFactory" >

< ref bean ="sessionFactory" />

</ property >

</ bean >

< bean id ="transactionManager" class ="org.springframework.orm.hibernate3.HibernateTransactionManager" >

< property name ="sessionFactory" >

< ref bean ="sessionFactory" />

</ property >

</ bean >

< bean id ="userDaoProxy" class ="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" >

< property name ="transactionManager" >

< ref bean ="transactionManager" />

</ property >

< property name ="proxyInterfaces" >

< list >

< value > com.ergal.hibernate.IUserDao </ value >

</ list >

</ property >

< property name ="target" >

< ref bean ="userDao" />

</ property >

< property name ="transactionAttributes" >

< props >

< prop key ="insert" > PROPAGATION_REQUIRED </ prop >

</ props >

</ property >

</ bean >

</ beans >

这么一来在修改数据库连接的部分就变的非常简单修改后也不用修改除sessionFactory的组装外的其他代码

二 proxool

这个可以通过对hibernateProperties的属性配置来设置

beans-config.xml

< bean id ="mySessionFactory" class ="org.springframework.orm.hibernate.LocalSessionFactoryBean" >

< property name ="mappingResources" >

< list >

< value > com/meagle/bo/Order.hbm.xml </ value >

< value > com/meagle/bo/OrderLineItem.hbm.xml </ value >

</ list >

</ property >

< property name ="hibernateProperties" >

< props >

< prop key ="hibernate.dialect" > net.sf.hibernate.dialect.MySQLDialect </ prop >

< prop key ="hibernate.show_sql" > true </ prop >

< prop key ="hibernate.cglib.use_reflection_optimizer" > true </ prop >

< prop key ="hibernate.proxool.xml" > C:/....../WebContent/WEB-INF/proxool.xml </ prop >

< prop key ="hibernate.proxool.pool_alias" > spring </ prop >

</ props >

</ property >

</ bean >

然后单独写一个proxool.xml

<? xmlversion="1.0"encoding="UTF-8" ?>

<!-- theproxoolconfigurationcanbeembeddedwithinyourownapplication's.

Anythingoutsidethe"proxool"tagisignored. -->

< proxool >

< alias > spring </ alias >

< driver-url > jdbc:mysql://localhost:3306/shtest </ driver-url >

< driver-class > com.mysql.jdbc.Driver </ driver-class >

< driver-properties >

< property name ="user" value ="root" />

< property name ="password" value ="password" />

</ driver-properties >

< minimum-connection-count > 2 </ minimum-connection-count >

< maximum-connection-count > 20 </ maximum-connection-count >

< maximum-connection-lifetime > 180000 </ maximum-connection-lifetime >

< house-keeping-test-sql > values(currentTimeStamp) </ house-keeping-test-sql >

< statistics > 1m,15m,1d </ statistics >

< statistics-log-level > INFO </ statistics-log-level >

< fatal-sql-exception > Connectionisclosed,SQLSTATE=08003,Erroropeningsocket.SQLSTATE=08S01,SQLSTATE=08S01 </ fatal-sql-exception >

< fatal-sql-exception-wrapper-class > org.logicalcobwebs.proxool.FatalRuntimeException </ fatal-sql-exception-wrapper-class >

< verbose > false </ verbose >

</ proxool >

Spring+Hibernate 配置和使用c3p0和proxool连接池

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