src/main/resources/mapper/UserMapper.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.javaer.employmentmanage.mapper.UserMapper">
    <resultMap id="userResultMap" type="com.javaer.employmentmanage.mapper.entity.User">
        <result column="user_id" jdbcType="VARCHAR" property="userId" />
        <result column="user_name" jdbcType="VARCHAR" property="userName" />
        <result column="user_pwd" jdbcType="VARCHAR" property="userPwd" />
        <result column="user_account" jdbcType="VARCHAR" property="userAccount" />
        <result column="user_type" jdbcType="VARCHAR" property="userType" />
    </resultMap>

    <select id="getAllUsers" resultMap="userResultMap" parameterType="com.javaer.employmentmanage.mapper.entity.User">
        select user_id, user_name, user_pwd, user_account, user_type from user
        where 1=1
        <if test="userId != null and userId != ''">
            and user_id = #{userId}
        </if>
        <if test="userName != null and userName != ''">
            and user_name like '%${userName}%'
        </if>
        <if test="userAccount != null and userAccount != ''">
            and user_account like '%${userAccount}%'
        </if>
        <if test="userType != null and userType != ''">
            and user_type = #{user_type}
        </if>
    </select>

    <select id="getUserById" resultMap="userResultMap">
        select user_id, user_name, user_pwd, user_account, user_type from user
        where user_id = #{userId}
    </select>

    <select id="getUserByAccount" resultMap="userResultMap">
        select user_id, user_name, user_pwd, user_account, user_type from user
        where user_account = #{userAccount}
    </select>

    <insert id="addUser" parameterType="com.javaer.employmentmanage.mapper.entity.User">
        insert into user 
        <trim prefix="(" suffix=")" suffixOverrides=",">
            <if test="userId != null">
                user_id,
            </if>
            <if test="userName != null">
                user_name,
            </if>
            <if test="userPwd != null">
                user_pwd,
            </if>
            <if test="userAccount != null">
                user_account,
            </if>
            <if test="userType != null">
                user_type,
            </if>
        </trim>
        <trim prefix="values(" suffix=")" suffixOverrides=",">
            <if test="userId != null">
                #{userId},