mybatis 增删改查、批量插入和删除以及自动生成uuid主键和分页

Mapper接口:

public int update(Admin admin);public Admin selectByUserName(String account);public List<Admin> list();public int add(Admin admin);public int delete(String id);public Set<String> getRoleIds(String adminId);public void deleteRole(Map<String,Object> map);public List<Role> getRoles(@Param("set") Set<String> roleIds);public void addRole(List<AdminRole> addRoleList);public void deleteRoles(@Param("adminId")String adminId, @Param("deleteList")List<String> deleteRoles);public List<Function> list(PageVo pageVo);

Mapper.xml:

<?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.young.shop.dao.mapper.AdminMapper">    <!--设置domain类和数据库中表的字段一一对应，注意数据库字段和domain类中的字段名称不致，此处一定要！ -->    <resultMap id="BaseResultMap" type="com.young.shop.vo.Admin">    <id column="id" property="id" jdbcType="VARCHAR" />    <result column="username" property="username" jdbcType="VARCHAR" />    <result column="password" property="password" jdbcType="VARCHAR" />    <result column="email" property="email" jdbcType="VARCHAR" />    </resultMap>    <resultMap id="AdminRoleResultMap" type="com.young.shop.vo.AdminRole">    <id column="id" property="id" jdbcType="VARCHAR" />    <result column="role_id" property="roleId" jdbcType="VARCHAR" />    <result column="admin_id" property="adminId" jdbcType="VARCHAR" />    </resultMap>    <resultMap id="RoleResultMap" type="com.young.shop.vo.Role">    <id column="id" property="id" jdbcType="VARCHAR" />    <result column="name" property="name" jdbcType="VARCHAR" />    </resultMap>    <!-- 查询单条记录 -->    <select id="selectByUserName" parameterType="String" resultMap="BaseResultMap">    SELECT * FROM t_admin WHERE username = #{username}    </select>    <!-- 查询所有记录 -->    <select id="list" resultMap="BaseResultMap">    SELECT * FROM t_admin    </select>    <!--修改记录 -->    <update id="update" parameterType="com.young.shop.vo.Admin">    update t_admin    <set>    <if test=" username != null ">    username = #{username,jdbcType=VARCHAR},    </if>    <if test=" password != null ">    password = #{password,jdbcType=VARCHAR},    </if>    <if test=" email != null ">    email = #{email,jdbcType=VARCHAR}    </if>    </set>    where id = #{id,jdbcType=VARCHAR}    </update>    <!--添加记录 -->    <insert id="add" parameterType="com.young.shop.vo.Admin"><selectKey keyProperty="id" resultType="java.lang.String"    order="BEFORE">    select replace(uuid(),'-','') from dual    </selectKey>    insert into t_admin (id,username,password,email) values    (#{id},#{username},#{password},#{email})    </insert>    <delete id="delete">    delete from t_admin where id=#{id}    </delete>    <select id="getRoleIds" resultMap="AdminRoleResultMap">    select * from t_admin_role    where admin_id = #{adminId}    </select>    <select id="getRoles" resultMap="RoleResultMap" parameterType="java.util.Set">    select * from t_role where id in    <foreach collection="set" index="index" item="item" open="("    separator="," close=")">    #{item.roleId}    </foreach>    </select>    <!-- 批量删除 使用map-->    <delete id="deleteRole" parameterType="map">    delete from t_admin_role where admin_id = #{adminId} and role_id in    <foreach collection="deleteRoles" index="index" item="item"    open="(" separator="," close=")">    #{item.roleId}    </foreach>    </delete>    <!-- 批量插入 -->    <insert id="addRole">    insert into t_admin_role (id,role_id,admin_id) values    <foreach collection="list" index="index" item="item"    separator=",">    (#{item.id},#{item.roleId},#{item.adminId})    </foreach>    </insert>    <!-- 批量删除 使用list-->    <delete id="deleteRoles">    delete from t_admin_role where admin_id = #{adminId} and role_id in    <foreach collection="deleteList" index="index" item="item"    open="(" separator="," close=")">    #{item}    </foreach>    </delete>    <!-- 查询所有记录 -->     <select id="list" parameterType="com.cn21.shop.vo.PageVo"      resultMap="BaseResultMap">      SELECT * FROM t_function      <if test=" page != null and size != null">       limit #{page},#{size}      </if>     </select>    </mapper>

加黑部分为需注意的地方以及分页查询和自动生成uuid主键

具体可以学习一下MyBatis的动态SQL详解