<bean?id="dataSource"?class="com.mchange.v2.c3p0.ComboPooledDataSource"> ????<!--?配置連接池屬性?--> ????<property?name="driverClass"?value="${driver}"/> ????<property?name="jdbcUrl"?value="${url}"/> ????<property?name="user"?value="root"/> ????<property?name="password"?value=""/> ????<!--?連接池的私有屬性?--> ????<property?name="maxPoolSize"?value="30"/> ????<property?name="minPoolSize"?value="10"/> ????<!--?關(guān)閉連接后不自動(dòng)commit?--> ????<property?name="autoCommitOnClose"?value="false"/> ????<!--?獲取連接超時(shí)時(shí)間?--> ????<property?name="checkoutTimeout"?value="5000"/> ????<!--?連接失敗重試次數(shù)?--> ????<property?name="acquireRetryAttempts"?value="2"/> </bean>driver=com.mysql.jdbc.Driver url=jdbc:mysql://localhost:3306/seckill?useUnicode=true&characterEncoding=utf8 userName=root password=為什么我的user屬性改成${userName}會(huì)報(bào)錯(cuò),而且錯(cuò)誤信息提示Administrator@localhost 連接失敗