为什么连接数据库提示Cannot load JDBC driver class?
“Cannot load JDBC driver class 'com.mysql.jdbc.Driver ” 表示没有JDBC连接MySql的驱动包,因此需要手动添加驱动包到WEB-INF目录下的lib目录中。从网上下载驱动包mysql-connector-java-5.1.5.zip,解压缩后将mysql-connector-java-5.1.5-bin.jar放到“**/workplace/MyEclipse 8.6/demo/WebRoot/WEB-INF/lib”目录下,即可解决上述问题。
Cannot load JDBC driver class 'com.microsoft.jdbc.sqlserver.SQLServerDriver' jar包有问题额,<property name="driverClassName" value = "com.microsoft.jdbc.sqlserver.SQLServerDriver" />把鼠标放在value上+Ctrl能点击去不
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.Driverurl=jdbc:mysql://localhost:3306/seckillusername=rootpassword=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。