1环境准备mybatis-config.xmlUsersMapper.xmlselect*fromt_usersUsersMapper.javapackagecom.pack.mapper;importjava.util.List;importcom.pack.domain.Users;publicinterfaceUsersMapper{ListselectList();}Users.javapublicclassUsers{privateStringid;privateStringusername;privateStringpassword;}UsersMapperTest.java测试类