SpringMVC +Spring+ SpringJDBC整合实例。文件结构：

1）web.xml的配置：

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<display-name></display-name>
<welcome-file-list>
   <welcome-file>index.jsp</welcome-file>
</welcome-file-list>


<listener>
   <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
</listener>

<servlet>
   <servlet-name>spring</servlet-name>
   <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
   <init-param>
       <param-name>contextConfigLocation</param-name>
       <param-value>classpath:*applicationContext.xml</param-value>
   </init-param>
   <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
   <servlet-name>spring</servlet-name>
   <url-pattern>*.do</url-pattern>
</servlet-mapping>
<!-- 统一字符编码为UTF-8 -->
<filter>
   <filter-name>setcharacter</filter-name>
   <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
   <init-param>
       <param-name>encoding</param-name>
       <param-value>utf-8</param-value>
   </init-param>
</filter>
<filter-mapping>
   <filter-name>setcharacter</filter-name>
</filter-mapping>
</web-app>

2）applicationContext.xml的配置：

<?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"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans 
      http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
      http://www.springframework.org/schema/context 
      http://www.springframework.org/schema/context/spring-context-3.0.xsd
      http://www.springframework.org/schema/tx 
      http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
      http://www.springframework.org/schema/mvc
      http://www.springframework.org/schema/mvc/spring-mvc.xsd
      http://www.springframework.org/schema/aop
      http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">

<context:property-placeholder location="classpath:jdbc.properties" />

<!-- 扫描类包，将标注Spring注解的类自动转化Bean，同时完成Bean的注入 -->
<context:component-scan base-package="com.controller" />
<context:component-scan base-package="com.service" />
<context:component-scan base-package="com.dao" />

<!-- 配置数据源 destroy-method="close" -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
destroy-method="close">
   <property name="driverClass">
       <value>${jdbc.driverClassName}</value>
   </property>
   <property name="jdbcUrl">
       <value>${jdbc.url}</value>
   </property>
   <property name="user">
       <value>${jdbc.username}</value>
   </property>
   <property name="password">
       <value>${jdbc.password}</value>
   </property>
   <!--连接池中保留的最小连接数。 -->
   <property name="minPoolSize">
       <value>5</value>
   </property>
   <!--连接池中保留的最大连接数。Default: 15 -->
   <property name="maxPoolSize">
       <value>30</value>
   </property>
   <!--初始化时获取的连接数，取值应在minPoolSize与maxPoolSize之间。Default: 3 -->
   <property name="initialPoolSize">
       <value>10</value>
   </property>
   <!--最大空闲时间,60秒内未使用则连接被丢弃。若为0则永不丢弃。Default: 0 -->
   <property name="maxIdleTime">
       <value>60</value>
   </property>
   <!--当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。Default: 3 -->
   <property name="acquireIncrement">
       <value>5</value>
   </property>
   <!--JDBC的标准参数，用以控制数据源内加载的PreparedStatements数量。但由于预缓存的statements 属于单个connection而不是整个连接池。所以设置这个参数需要考虑到多方面的因素。 
   如果maxStatements与maxStatementsPerConnection均为0，则缓存被关闭。Default: 0 -->
   <property name="maxStatements">
       <value>0</value>
   </property>
   <!--每60秒检查所有连接池中的空闲连接。Default: 0 -->
   <property name="idleConnectionTestPeriod">
       <value>60</value>
   </property>
   <!--定义在从数据库获取新连接失败后重复尝试的次数。Default: 30 -->
   <property name="acquireRetryAttempts">
       <value>30</value>
   </property>
   <!--获取连接失败将会引起所有等待连接池来获取连接的线程抛出异常。但是数据源仍有效 保留，并在下次调用getConnection()的时候继续尝试获取连接。如果设为true，那么在尝试 
   获取连接失败后该数据源将申明已断开并永久关闭。Default: false -->
   <property name="breakAfterAcquireFailure">
       <value>true</value>
   </property>
   <!--因性能消耗大请只在需要的时候使用它。如果设为true那么在每个connection提交的 时候都将校验其有效性。建议使用idleConnectionTestPeriod或automaticTestTable 
   等方法来提升连接测试的性能。Default: false -->
   <property name="testConnectionOnCheckout">
       <value>false</value>
   </property>

   <property name="automaticTestTable">
       <value>true</value>
   </property>
</bean>

<!-- 配置Jdbc模板 -->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
   <property name="dataSource" ref="dataSource"></property>
</bean>

<!-- 配置事务管理器 -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
p:dataSource-ref="dataSource" />

<!-- 通过AOP配置提供事务增强，让service包下所有Bean的所有方法拥有事务 -->
<aop:config proxy-target-class="true">
   <aop:pointcut id="serviceMethod" expression=" execution(* com.service..*(..))" />
   <aop:advisor pointcut-ref="serviceMethod" advice-ref="txAdvice" />
</aop:config>
<tx:advice id="txAdvice" transaction-manager="transactionManager">
   <tx:attributes>
       <tx:method name="*" />
   </tx:attributes>
</tx:advice>

<!-- 启动Spring MVC的注解功能，完成请求和注解POJO的映射 -->
<bean
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />


<!-- 配置视图解析器，将ModelAndView及字符串解析为具体的页面 -->
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:viewClass="org.springframework.web.servlet.view.JstlView" p:prefix="/WEB-INF/user/"
p:suffix=".jsp" />

<!-- <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"> 
<property name="interceptors"> <list> <ref bean="loginInterceptor"/> </list> 
</property> </bean> <bean id="loginInterceptor" class="com.interceptor.LoginInterceptor"> 
</bean> -->
<!-- <mvc:interceptors> <bean class="com.interceptor.LoginInterceptor"> 
</bean> </mvc:interceptors> -->

</beans>

3）jdbc.properties的配置:

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/sssjdbc_test
jdbc.username=root
jdbc.password=123456

4)log4j.properties的配置:

root level

log4j.rootLogger=ERROR, stdout, A2
log4j.logger.gnnt=DEBUG
log4j.logger.org.springframework=WARN

console config

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=[%-5p] %d{HH:mm:ss} [%c{1}] - %m%n

file config

log4j.appender.A2=org.apache.log4j.DailyRollingFileAppender
log4j.appender.A2.file=../logs/issue_mgr.log
log4j.appender.A2.DatePattern='.'yyyy-MM-dd
log4j.appender.A2.layout=org.apache.log4j.PatternLayout
log4j.appender.A2.layout.ConversionPattern=[%-5p] %d{HH:mm:ss} [%c{1}] - %m%n