src/main/resources/mapper/StudentMapper.xml

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<?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="com.example.demo28.mapper.StudentMapper">
    <select id="queryStudentList" resultType="Student">
        select * from student
    </select>

    <select id="queryStudentByUsername" parameterType="String" resultType="Student">
        select * from student where username=#{username}
    </select>
    <select id="queryStudentByEmail" parameterType="String" resultType="Student">
        select * from student where email=#{email}
    </select>
    <select id="queryStudentById" parameterType="int" resultType="Student">
        select * from student where id=#{id}
    </select>
    <insert id="addStudent" parameterType="Student">
        insert into student(username, password, in_blacklist, email, gender, name) values(#{username},#{password},#{in_blacklist},#{email},#{gender},#{name})
    </insert>
    <update id="updateStudent" parameterType="Student">
        update student set name=#{name},password=#{password},gender=#{gender},email=#{email} where id=#{id}
    </update>
    <delete id="deleteStudent" parameterType="int">
        delete from student where id=#{id};
    </delete>

    <select id="searchStuByID" parameterType="Integer" resultType="com.example.demo28.pojo.Student">
        select * from student where id=#{id}
    </select>
    <select id="getAllStudent" resultType="com.example.demo28.pojo.Student">
        select * from student
    </select>

    <update id="setBlacklist" parameterType="com.example.demo28.pojo.Student">
        update student set in_blacklist=1 where id=#{id}
    </update>

    <update id="UpdateImage" parameterType="java.lang.String">
        update student set image=#{imageURL} where username=#{username}
    </update>
</mapper>