网页展示Access denied for user 'root'@'localhost'

<data-sources>         <data-source type="org.apache.commons.dbcp.BasicDataSource" key="dataSources">                         <set-property  property="driverClassName"    value="org.gjt.mm.mysql.Driver"   />                 <set-property  property="url"   value="jdbc:mysql://localhost:3306/db_bbs"    />               <set-property   value="20"   property="maxCount"   />                 <set-property   value="1"   property="minCount"   />                   <set-property  property="username"  value="root"     />                 <set-property  property="password" value=""      />             </data-source>   </data-sources>