spring配置数据源的4种方式--简介

在spring中配置数据源这是做项目不可避免的，今天我把了解到的配置方式在这里做个总结。

本人目前知道4种方式。

1.jdbc

org.springframework.jdbc.datasource.DriverManagerDataSource

 

2.dbcp

org.apache.commons.dbcp.BasicDataSource

 

3.c3p0

com.mchange.v2.c3p0.ComboPooledDataSource

 

4.jndi

org.springframework.jndi.JndiObjectFactoryBean

 

首先，jdbc建立连接是只要有连接就新建一个connection,根本没有连接池的作用。不常用。

其次，jndi需要在web server中配置数据源，不方便于部署。不推荐。

常用的还是dbcp和c3p0.

 

这里我给一个有jdbc,  dbcp,  c3p0  配置数据源的例子。（经过本人测试）。

 

applicationContext.xml 内容如下：

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1. <?xml version="1.0" encoding="UTF-8"?>  
2. <beans  
3.     xmlns="http://www.springframework.org/schema/beans"  
4.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
5.     xmlns:p="http://www.springframework.org/schema/p"  
6.     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">  
7.   
8.    
9.     <bean id="propertyConfigurer"  
10.        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">  
11.         <property name="locations">  
12.             <list>  
13.                 <value>/dataSource.properties</value>  
14.                 <value>/hibernateProperties.properties</value>  
15.             </list>  
16.         </property>  
17.     </bean>  
18.   
19.     <!-- spring配置数据源方式1,dbcp   -->  
20.     <!--    
21.     <bean id="dataSource"  
22.         class="org.apache.commons.dbcp.BasicDataSource">  
23.         <property name="driverClassName"  
24.             value="oracle.jdbc.driver.OracleDriver">  
25.         </property>  
26.         <property name="url"  
27.             value="jdbc:oracle:thin:@127.0.0.1:1521:orcl">  
28.         </property>  
29.         <property name="username" value="system"></property>  
30.         <property name="password" value="system"></property>  
31.     </bean>  
32.     -->  
33.       
34.      <!-- spring配置数据源方式2,dbcp   propertyConfigurer-->  
35.      <!--   
36.     <bean id="dataSource"  
37.         class="org.apache.commons.dbcp.BasicDataSource">  
38.         <property name="driverClassName"  
39.             value="${connection.driver_class}">  
40.         </property>  
41.         <property name="url"  
42.             value="${connection.url}">  
43.         </property>  
44.         <property name="username" value="${connection.username}"></property>  
45.         <property name="password" value="${connection.password}"></property>  
46.     </bean>  
47.      -->  
48.        
49.      <!-- spring配置数据源方式3, c3p0 -->  
50.      <!--     
51.     <bean id="dataSource"  
52.         class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">  
53.           
54.         <property name="driverClass" value="oracle.jdbc.driver.OracleDriver"/>           
55.         <property name="jdbcUrl" value="jdbc:oracle:thin:@127.0.0.1:1521:orcl"/>           
56.         <property name="user" value="system"/>           
57.         <property name="password" value="system"/>   
58.     </bean>  
59.     -->  
60.       
61.      <!-- spring配置数据源方式4, c3p0  propertyConfigurer -->  
62.      <!--     
63.     <bean id="dataSource"  
64.         class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">  
65.           
66.         <property name="driverClass" value="${connection.driver_class}"/>           
67.         <property name="jdbcUrl" value="${connection.url}"/>           
68.         <property name="user" value="${connection.username}"/>           
69.         <property name="password" value="${connection.password}"/>   
70.     </bean>  
71.     -->  
72.       
73.     <!-- spring配置数据源方式5, jdbc   -->  
74.     <!--    
75.     <bean id="dataSource"   
76.          class="org.springframework.jdbc.datasource.DriverManagerDataSource">    
77.          <property name="driverClassName">    
78.             <value>oracle.jdbc.driver.OracleDriver</value>    
79.          </property>    
80.         <property name="url">    
81.              <value>jdbc:oracle:thin:@127.0.0.1:1521:orcl</value>    
82.          </property>    
83.          <property name="username">    
84.              <value>system</value>    
85.          </property>    
86.          <property name="password">    
87.             <value>system</value>    
88.          </property>    
89.      </bean>   
90.     -->  
91.     <!-- spring配置数据源方式6, jdbc  propertyConfigurer -->  
92.     <bean id="dataSource"   
93.          class="org.springframework.jdbc.datasource.DriverManagerDataSource">    
94.          <property name="driverClassName">    
95.             <value>${connection.driver_class}</value>    
96.          </property>    
97.         <property name="url">    
98.              <value>${connection.url}</value>    
99.          </property>    
100.          <property name="username">    
101.              <value>${connection.username}</value>    
102.          </property>    
103.          <property name="password">    
104.             <value>${connection.password}</value>    
105.          </property>    
106.      </bean>   
107.       
108.     <bean id="sessionFactory"  
109.         class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">  
110.           
111.         <property name="dataSource">  
112.             <ref bean="dataSource" />  
113.         </property>  
114.           
115.         <!-- spring配置hibernate属性，方式一,使用hibernate.cfg.xml文件 -->  
116.         <!--   
117.         <property name="configLocation" value="classpath:hibernate.cfg.xml"></property>  
118.          -->  
119.           
120.         <!-- spring配置hibernate属性，方式二，直接配置属性值 -->  
121.         <!--    
122.         <property name="hibernateProperties">  
123.             <props>  
124.                 <prop key="hibernate.dialect">org.hibernate.dialect.OracleDialect</prop>  
125.                 <prop key="hibernate.format_sql">true</prop>  
126.                 <prop key="hibernate.show_sql">true</prop>  
127.                 <prop key="hibernate.connection.pool_size">3</prop>  
128.             </props>  
129.         </property>  
130.           
131.         <property name="mappingResources">  
132.             <list>  
133.                <value>event.hbm.xml</value>  
134.                <value>person.hbm.xml</value>  
135.             </list>  
136.         </property>  
137.           
138.         -->  
139.           
140.         <!-- spring配置hibernate属性，方式三,配置助手propertyConfigurer使用properties文件 -->  
141.         <property name="hibernateProperties">  
142.             <props>  
143.                 <prop key="hibernate.dialect">${dialect}</prop>  
144.                 <prop key="hibernate.format_sql">${format_sql}</prop>  
145.                 <prop key="hibernate.show_sql">${show_sql}</prop>  
146.                 <prop key="hibernate.connection.pool_size">${connection.pool_size}</prop>  
147.             </props>  
148.         </property>  
149.           
150.         <property name="mappingResources">  
151.             <list>  
152.                <value>event.hbm.xml</value>  
153.                <value>person.hbm.xml</value>  
154.             </list>  
155.         </property>  
156.           
157.     </bean>  
158.       
159.     </beans>  

<?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:p="http://www.springframework.org/schema/p"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

 
    <bean id="propertyConfigurer"
       class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
	    <property name="locations">
	    	<list>
	    		<value>/dataSource.properties</value>
	    		<value>/hibernateProperties.properties</value>
	    	</list>
	    </property>
    </bean>

    <!-- spring配置数据源方式1,dbcp   -->
    <!--  
	<bean id="dataSource"
		class="org.apache.commons.dbcp.BasicDataSource">
		<property name="driverClassName"
			value="oracle.jdbc.driver.OracleDriver">
		</property>
		<property name="url"
			value="jdbc:oracle:thin:@127.0.0.1:1521:orcl">
		</property>
		<property name="username" value="system"></property>
		<property name="password" value="system"></property>
	</bean>
	-->
	
	 <!-- spring配置数据源方式2,dbcp   propertyConfigurer-->
	 <!-- 
	<bean id="dataSource"
		class="org.apache.commons.dbcp.BasicDataSource">
		<property name="driverClassName"
			value="${connection.driver_class}">
		</property>
		<property name="url"
			value="${connection.url}">
		</property>
		<property name="username" value="${connection.username}"></property>
		<property name="password" value="${connection.password}"></property>
	</bean>
	 -->
	 
	 <!-- spring配置数据源方式3, c3p0 -->
	 <!--   
	<bean id="dataSource"
		class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
		
	    <property name="driverClass" value="oracle.jdbc.driver.OracleDriver"/>         
        <property name="jdbcUrl" value="jdbc:oracle:thin:@127.0.0.1:1521:orcl"/>         
        <property name="user" value="system"/>         
        <property name="password" value="system"/> 
	</bean>
	-->
	
	 <!-- spring配置数据源方式4, c3p0  propertyConfigurer -->
	 <!--   
	<bean id="dataSource"
		class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
		
	    <property name="driverClass" value="${connection.driver_class}"/>         
        <property name="jdbcUrl" value="${connection.url}"/>         
        <property name="user" value="${connection.username}"/>         
        <property name="password" value="${connection.password}"/> 
	</bean>
	-->
	
	<!-- spring配置数据源方式5, jdbc   -->
	<!--  
	<bean id="dataSource" 
         class="org.springframework.jdbc.datasource.DriverManagerDataSource">  
         <property name="driverClassName">  
            <value>oracle.jdbc.driver.OracleDriver</value>  
         </property>  
        <property name="url">  
             <value>jdbc:oracle:thin:@127.0.0.1:1521:orcl</value>  
         </property>  
         <property name="username">  
             <value>system</value>  
         </property>  
         <property name="password">  
            <value>system</value>  
         </property>  
     </bean> 
	-->
	<!-- spring配置数据源方式6, jdbc  propertyConfigurer -->
	<bean id="dataSource" 
         class="org.springframework.jdbc.datasource.DriverManagerDataSource">  
         <property name="driverClassName">  
            <value>${connection.driver_class}</value>  
         </property>  
        <property name="url">  
             <value>${connection.url}</value>  
         </property>  
         <property name="username">  
             <value>${connection.username}</value>  
         </property>  
         <property name="password">  
            <value>${connection.password}</value>  
         </property>  
     </bean> 
	
	<bean id="sessionFactory"
		class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
		
		<property name="dataSource">
			<ref bean="dataSource" />
		</property>
		
		<!-- spring配置hibernate属性，方式一,使用hibernate.cfg.xml文件 -->
		<!--  
		<property name="configLocation" value="classpath:hibernate.cfg.xml"></property> 
		 -->
		
		<!-- spring配置hibernate属性，方式二，直接配置属性值 -->
		<!--  
		<property name="hibernateProperties">
			<props>
				<prop key="hibernate.dialect">org.hibernate.dialect.OracleDialect</prop>
				<prop key="hibernate.format_sql">true</prop>
				<prop key="hibernate.show_sql">true</prop>
				<prop key="hibernate.connection.pool_size">3</prop>
			</props>
		</property>
		
		<property name="mappingResources">
            <list>
               <value>event.hbm.xml</value>
               <value>person.hbm.xml</value>
            </list>
        </property>
		
		-->
		
		<!-- spring配置hibernate属性，方式三,配置助手propertyConfigurer使用properties文件 -->
		<property name="hibernateProperties">
			<props>
				<prop key="hibernate.dialect">${dialect}</prop>
				<prop key="hibernate.format_sql">${format_sql}</prop>
				<prop key="hibernate.show_sql">${show_sql}</prop>
				<prop key="hibernate.connection.pool_size">${connection.pool_size}</prop>
			</props>
		</property>
		
		<property name="mappingResources">
            <list>
               <value>event.hbm.xml</value>
               <value>person.hbm.xml</value>
            </list>
        </property>
        
	</bean>
	
	</beans>

 

 

其中涉及到的properties文件有：

 

dataSource.properties

 

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1.   
2. connection.url=jdbc:oracle:thin:@127.0.0.1:1521:orcl  
3. connection.username=system  
4. connection.password=system  
5.   
6. connection.driver_class=oracle.jdbc.driver.OracleDriver  

connection.url=jdbc:oracle:thin:@127.0.0.1:1521:orcl
connection.username=system
connection.password=system

connection.driver_class=oracle.jdbc.driver.OracleDriver

hibernateProperties.properties

 

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1.   
2. dialect=org.hibernate.dialect.OracleDialect  
3.   
4. format_sql=true  
5. show_sql=true  
6. connection.pool_size=3  

dialect=org.hibernate.dialect.OracleDialect

format_sql=true
show_sql=true
connection.pool_size=3

 

 

大家注意到了，

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1. <bean id="propertyConfigurer"  
2.        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">  
3.         <property name="locations">  
4.             <list>  
5.                 <value>/dataSource.properties</value>  
6.                 <value>/hibernateProperties.properties</value>  
7.             </list>  
8.         </property>  
9.     </bean>  

<bean id="propertyConfigurer"
       class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
	    <property name="locations">
	    	<list>
	    		<value>/dataSource.properties</value>
	    		<value>/hibernateProperties.properties</value>
	    	</list>
	    </property>
    </bean>

这个只是帮助你把有些需要写在xml文件外的属性值从某个properties文件读取，你用${属性名} 就

可以取到了。这其实并没有改变连接池的本质，还属于同一种连接方法。

 

本例主要讲解dataSource的配置。

至于本例中的sessionFactory配置不用关心了。