<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/ssm_mybatis?useUnicode=true&characterEncoding=utf-8"/>
<property name="username" value="***"/>
<property name="password" value="***"/>
加上这句话:?useUnicode=true&characterEncoding=utf-8