spring+hibernate的几种数据库连接配置方式

1 普通jdbc方式，基本代码如下

<? xml version="1.0" encoding="UTF-8" ?>
< beans  xmlns ="http://www.springframework.org/schema/beans"
    xmlns:xsi ="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:aop ="http://www.springframework.org/schema/aop"
    xmlns:context ="http://www.springframework.org/schema/context"
    xmlns:tx ="http://www.springframework.org/schema/tx"
    xsi:schemaLocation ="
       http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd" >
     < context:annotation-config />
    
     < context:component-scan  base-package ="com.huaxia.oaapp" >
         < context:include-filter  type ="aspectj"  expression ="com.huaxia.oaapp.service..*" />
         < context:include-filter  type ="aspectj"  expression ="com.huaxia.oaapp.entity..*" />
         < context:exclude-filter  type ="aspectj"  expression ="com.huaxia.oaapp.action..*" />
     </ context:component-scan >
     < context:property-placeholder  location ="classpath:jdbc.properties"   />
     < bean  id ="dataSource"  
        class ="org.apache.commons.dbcp.BasicDataSource"
        destroy-method ="close" >
         < property  name ="driverClassName"  value ="${jdbc.driverClassName}"   />
         < property  name ="url"  value ="${jdbc.url}"   />
         < property  name ="username"  value ="${jdbc.username}"   />
         < property  name ="password"  value ="${jdbc.password}"   />
     </ bean >
    
     < bean  id ="sessionFactory"
        class ="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean" >
         < property  name ="dataSource" >
             < ref  bean ="dataSource"   />
         </ property >
         < property  name ="hibernateProperties" >
             < props >
                 < prop  key ="hibernate.dialect" > org.hibernate.dialect.SQLServerDialect </ prop >
                 < prop  key ="hibernate.show_sql" > true </ prop >
                 < prop  key ="hiberante.format_sql" > true </ prop >
             </ props >
         </ property >
         < property  name ="annotatedClasses" >
             < list >
                 < value > com.huaxia.oaapp.entity.User </ value >
             </ list >
         </ property >
         < property  name ="annotatedPackages" >
             < list >
                 < value > com.huaxia.oaapp.entity </ value >
             </ list >
         </ property >
     </ bean >

     < bean  id ="transactionManager"
        class ="org.springframework.orm.hibernate3.HibernateTransactionManager" >
         < property  name ="sessionFactory"  ref ="sessionFactory"   />
     </ bean >
     < aop:config >
         < aop:pointcut  id ="baseServiceMethods"
            expression ="execution(* com.huaxia.oaapp.service.*.*(..)),execution(* com.huaxia.oaapp.aop.*.*(..))"   />
         < aop:advisor  advice-ref ="txAdvice"
            pointcut-ref ="baseServiceMethods"   />
     </ aop:config >
     < aop:aspectj-autoproxy  />
     < tx:advice  id ="txAdvice"  transaction-manager ="transactionManager" >
         < tx:attributes >
             < tx:method  name ="select*"  read-only ="true"  propagation ="REQUIRED" />
             < tx:method  name ="find*"  read-only ="true"   propagation ="REQUIRED" />
             < tx:method  name ="save*"   propagation ="REQUIRED"  isolation ="REPEATABLE_READ" />
             < tx:method  name ="update*"   propagation ="REQUIRED"  isolation ="REPEATABLE_READ" />
             < tx:method  name ="add*"   propagation ="REQUIRED"  isolation ="REPEATABLE_READ"   />
             < tx:method  name ="delete*"   propagation ="REQUIRED"  isolation ="REPEATABLE_READ" />
         </ tx:attributes >
     </ tx:advice >
</ beans >

上面hibernateProperties还可以这么配置，效果是一样的

         < property  name ="hibernateProperties" >
             < value >
                hibernate.dialect=org.hibernate.dialect.SQLServerDialect
                hibernate.show_sql=true
                hiberante.format_sql=true
             </ value >
         </ property >

还可以直接把配置信息放到hibernate.cfg.xml中，代码如下

     < bean  id ="sessionFactory"
        class ="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean" >
         < property  name ="configLocations" >
             < list >
                 < value > classpath:hibernate.cfg.xml </ value >
             </ list >
         </ property >  
     </ bean >

hibernate.cfg.xml代码如下

<? xml version="1.0" encoding="UTF-8" ?>
<! DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd" >
< hibernate-configuration >
     < session-factory  name ="sessionFactory" >
         < property  name ="hibernate.connection.driver_class" >
            com.microsoft.sqlserver.jdbc.SQLServerDriver
         </ property >
         < property  name ="hibernate.connection.password" > 123456 </ property >
         < property  name ="hibernate.connection.url" >
            jdbc:sqlserver://localhost:1433; DatabaseName=oadb
         </ property >
         < property  name ="hibernate.connection.username" > sa </ property >
         < property  name ="hibernate.dialect" >
            org.hibernate.dialect.SQLServerDialect
         </ property >
         < property  name ="hibernate.show_sql" > true </ property >
         < property  name ="hiberante.format_sql" > true </ property >
         < property  name ="hibernate.cache.provider_class" >
            org.hibernate.cache.EhCacheProvider
         </ property >
        
         < property  name ="hibernate.connection.autocommit" > false </ property >
         < mapping  class ="com.huaxia.oaapp.entity.User"   />
     </ session-factory >
</ hibernate-configuration >

2 配置proxool连接池
第一种：spring中配置proxool非常简单，代码如下

< bean  id ="sessionFactory"
        class ="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean" >
         < property  name ="hibernateProperties" >
             < props >
                 < prop  key ="hibernate.dialect" >
                    org.hibernate.dialect.SQLServerDialect
                 </ prop >
                 < prop  key ="hibernate.show_sql" > true </ prop >
                 < prop  key ="hiberante.format_sql" > true </ prop >
                 < prop  key ="hibernate.proxool.pool_alias" > myDataSource </ prop >
                 < prop  key ="hibernate.proxool.xml" > Proxool.xml </ prop >
             </ props >
         </ property >
        
     </ bean >

其中 Proxool.xml 在根目录下，大致内容如下

< something-else-entirely >
   < proxool >
     < alias > myDataSource </ alias >
     < driver-url >
        jdbc:sqlserver://localhost:1433; DatabaseName=test
        </ driver-url >
     < driver-class > com.microsoft.sqlserver.jdbc.SQLServerDriver </ driver-class >
     < driver-properties >
       < property  name ="user"  value ="sa" />
       < property  name ="password"  value ="123456" />
     </ driver-properties >
     < house-keeping-sleep-time > 1000 </ house-keeping-sleep-time >  
     < maximum-connection-count > 2 </ maximum-connection-count >
     < house-keeping-test-sql > select CURRENT_DATE </ house-keeping-test-sql >
   </ proxool >
</ something-else-entirely >

第二种：上面是嵌入了proxool.xml文件，其实也可以直接嵌入proxool属性，这样就不用再建立Proxool.xml文件了，代码如下

     < bean  id ="dataSource"  class ="org.logicalcobwebs.proxool.ProxoolDataSource"  destroy-method ="close" >
         < property  name ="alias"  value ="test" ></ property >
         < property  name ="delegateProperties" >
             < value > user=${jdbc.username},password=${jdbc.password} </ value >
         </ property >
         < property  name ="user"  value ="${jdbc.username}" />
         < property  name ="password"  value ="${jdbc.password}" />
         < property  name ="driver"  value ="${jdbc.driverClassName}" />
         < property  name ="driverUrl"  value ="${jdbc.url}" />
     </ bean >
     < bean  id ="sessionFactory"
        class ="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean" >
         < property  name ="dataSource" >
             < ref  bean ="dataSource"   />
         </ property >
         < property  name ="hibernateProperties" >
             < props >
                 < prop  key ="hibernate.dialect" > org.hibernate.dialect.SQLServerDialect </ prop >
                 < prop  key ="hibernate.show_sql" > true </ prop >
                 < prop  key ="hiberante.format_sql" > true </ prop >
             </ props >
         </ property >
        
     </ bean >

此处说明一下：属性中的user和password不起任何作用，需要用delegateProperties方式写一下，否则会报错误，如下
    org.springframework.transaction.CannotCreateTransactionException: Could not open JDBC Connection for transaction; nested exception is com.microsoft.sqlserver.jdbc.SQLServerException: Login failed for user ''. The user is not associated with a trusted SQL Server connection.
但是user和password还不能被去掉。

除了上面的用delegateProperties之外，还可以将用户名和密码直接写在url后面。

proxool属性的说明，在这里写的比较详细
http://www.cnblogs.com/wllyy189/archive/2008/10/15/1311560.html

第三种：在hibernate.cfg.xml中配置proxool连接池，代码如下
applicationContext.xml文件大致配置如下：

     < bean  id ="sessionFactory"
        class ="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean" >

         < property  name ="configLocations" >
             < list >
                 < value > classpath:hibernate.cfg.xml </ value >
             </ list >
         </ property >
     </ bean >

hibernate.cfg.xml的配置如下：

< hibernate-configuration >
      < session-factory  name ="sessionFactory" >
         < property  name ="dialect" > org.hibernate.dialect.SQLServerDialect </ property >
         < property  name ="show_sql" > true </ property >
         < property  name ="connection.provider_class" > org.hibernate.connection.ProxoolConnectionProvider </ property >
         < property  name ="proxool.pool_alias" > myDataSource </ property >
         < property  name ="proxool.xml" > Proxool.xml </ property >
         < property  name ="connection.autocommit" > =true  </ property >
         < property  name ="jdbc.batch_size" > 20 </ property >
         < property  name ="default_schema" > dbo </ property >
         < mapping  class ="com.huaxia.oaapp.entity.User"   />
         < mapping  class ="com.huaxia.oaapp.entity.Document"   />
         < mapping  class ="com.huaxia.oaapp.entity.Certificate"   />
     </ session-factory >
</ hibernate-configuration >    

其中 Proxool.xml 就是要加入的proxool连接池的配置文件