使用 C3P0连接数据库奇怪的发现java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: Y

解决方案：

定义字符编码，并且不使用properties文件

<?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.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd"> <context:component-scan base-package="com.atguigu.spring"></context:component-scan>

<!-- 导入资源文件 -->
<context:property-placeholder location="classpath:db.properties"/>

<!-- 配置 C3P0 数据源 -->
<bean id="dataSource"
class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="user" value="root"></property>
<property name="password" value="***"></property>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/member?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull"></property>
<property name="driverClass" value="com.mysql.jdbc.Driver"></property>

<property name="initialPoolSize" value="5"></property>
<property name="maxPoolSize" value="10"></property>
</bean>
<!-- 配置spring的jdbcTemplate -->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"></property>
</bean>

</beans>