解决Mybatis连接Sql server 出现 Cannot load JDBC driver class 'com.mysql.jdbc.Driver '的

sdchy

　　tomcat启动的时候没有错误，但是进行数据库操作就会有错误。


　　在网上找了很久  好不容易找到解决方法  
　　转自 http://blog.csdn.net/ro_bot/article/details/51659502
　　出现以上错误原因是：数据源的错误配置：
　　错误的jdbc.properties

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/seckill
username=root
password=root
　　错误的spring.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<context:property-placeholder location="jdbc.properties"/>
<bean id="dataSource" destroy-method="close" class="org.apache.commons.dbcp.BasicDataSource" >
<property name="driverClass" value="${driver}"/>
<property name="url" value="${url}" />
<property name="username" value="${username}" />
<property name="password" value="${password}" />
</beans>
　　将配置修改为：
　　jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/seckill
jdbc.username=root
jdbc.password=root
　　spring-dao.xml

<?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:context="http://www.springframework.org/schema/context"
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">
<context:property-placeholder location="jdbc.properties"/>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClass" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>
</beans>
　　配置完后成功运行。