<?xml version="1.0" encoding="utf-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" > <mapper namespace="dao.Login"> <select id="getUser" resultType="com.example.chat.entity.User"> select * from user where account = #{account}; </select> <select id="emailCheck" resultType="com.example.chat.entity.User"> select * from user where email = #{email}; </select> <insert id="addUser"> insert into user(account, password, username, email) values (#{account}, #{password}, #{username}, #{email}); </insert> <delete id="delUser"> delete from user where account = #{account}; </delete> <update id="updateUser"> update user set password=#{password} and username = #{username} and email=#{email} where account = #{account}; </update> </mapper>