mybatis的mapper特殊字符转移及动态SQL条件查询小结

<select id="selg" resultType="log">
    select * from log where 1=1
    <if test="param1!=null and param1!=''">
    and outno=#{param1}
    </if>
    <if test="param2!=null and param2!=''">
    and inno=#{param2}
    </if>
</select>

<select id="selg" resultType="log">
      select * from log 
  <where>
       <if test="param1!=null and param1!=''">
      and outno=#{param1}
      </if>
      <if test="param2!=null and param2!=''">
      and inno=#{param2}
      </if>
  </where>
     
</select>

<select id="selg" resultType="log">
      select * from log 
  <where>
    <choose>
       <when test="param1!=null and param1!=''">
      and outno=#{param1}
      </when>
      <when test="param2!=null and param2!=''">
      and inno=#{param2}
      </when>
      <otherwise>
        and 1=1
      </otherwise>
    </choose>
  </where>
     
</select>

<select id="selF" parameterType="list" resultType="account">
    select * from account where ano in
    <foreach collection="list" item="item" open="(" separator="," close=")">
    #{item}
    </foreach>
   </select>


<insert id="insertBatch">
        INSERT INTO t_user
        (id, name, password)
        VALUES
        <foreach collection ="userList" item="user" separator =",">
            (#{user.id}, #{user.name}, #{user.password})
        </foreach >
    </insert>

<select id="findUsersByUser" resultType="cn.soboys.kmall.sys.entity.User">
        select tu.USER_ID,tu.USERNAME,tu.SSEX,td.DEPT_NAME,tu.MOBILE,tu.EMAIL,tu.STATUS,tu.CREATE_TIME,
        td.DEPT_ID
        from t_user tu left join t_dept td on tu.DEPT_ID = td.DEPT_ID
        where tu.ADMIN_TYPE_ID  &gt;= 0 AND tu.ADMIN_TYPE_ID  &lt;= #{userParams.adminType}
        <if test="userParams.roleId != null and userParams.roleId != ''">
           and (select group_concat(ur.ROLE_ID)
            from t_user u
            right join t_user_role ur on ur.USER_ID = u.USER_ID,
            t_role r
            where r.ROLE_ID = ur.ROLE_ID
            and u.USER_ID = tu.USER_ID and r.ROLE_ID=#{userParams.roleId})
        </if>


        <if test="userParams.mobile != null and userParams.mobile != ''">
            AND tu.MOBILE =#{userParams.mobile}
        </if>
        <if test="userParams.username != null and userParams.username != ''">
            AND tu.USERNAME   like CONCAT('%',#{userParams.username},'%')
        </if>
        <if test="userParams.ssex != null and userParams.ssex != ''">
            AND tu.SSEX  =#{userParams.ssex}
        </if>
        <if test="userParams.status != null and userParams.status != ''">
            AND tu.STATUS =#{userParams.status}
        </if>
        <if test="userParams.deptId != null and userParams.deptId != ''">
            AND td.DEPT_ID =#{userParams.deptId}
        </if>
        <if test="userParams.createTime != null and userParams.createTime != ''">
            AND DATE_FORMAT(tu.CREATE_TIME,'%Y%m%d') BETWEEN substring_index(#{userParams.createTime},'#',1) and substring_index(#{userParams.createTime},'#',-1)
        </if>
    </select>

<T> IPage<User> findUsersByUser(Page<T> page, @Param("userParams") SearchUserParams userParams);

@Data
public class SearchUserParams {
    private String username;
    private String mobile;
    private String status;
    private String ssex;
    private Long deptId;
    private String createTime;
    private long adminType;
    private String roleId;
}

<select id="findSearchCouponsPage" parameterType="cn.soboys.kmall.bean.web.params.SearchCouponParams" resultType="coupon">
        select *
        from coupon c
        left join user_coupon uc on c.coupon_id = uc.coupon_id
        WHERE 1 = 1
        <if test="couponParams.userId != null and couponParams.userId != ''">
           and uc.user_id =#{couponParams.userId}
        </if>
        <if test="couponParams.status != null and couponParams.status != ''">
            and c.status =#{couponParams.status}
        </if>
        <if test="couponParams.couponId != null and couponParams.couponId != ''">
            and c.coupon_id =#{couponParams.couponId}
        </if>
        <if test="couponParams.couponType != null and couponParams.couponType != ''">
            and c.type =#{couponParams.couponType}
        </if>
    </select>