Druid 数据源 连接MySql 失败 using password:YES?报错

报错:

Caused by: java.sql.SQLException: Access denied for user ''@'localhost' (using password: YES)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1094)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4208)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4140)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:925)
    at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1747)
    at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1287)
    at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2494)
    at com.mysql.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:2332)

applicationContext-dao.xml:

<!--加载配置文件-->
<context:property-placeholder location="classpath:properties/db.properties" />

<!--数据库连接池-->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
      destroy-method="close">
    <property name="url" value="${jdbc.url}" />
    <property name="driverClassName" value="${jdbc.driver}" />
    <property name="name" value="${jdbc.username}" />
    <property name="password" value="${jdbc.password}" />
    <property name="maxActive" value="10" />
    <property name="minIdle" value="5" />
</bean>

db.properties:

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/taotao?useUnicode=true&autoReconnect=true&characterEncoding=utf-8
jdbc.username=root
jdbc.password=rootadmin