gold_java/src/main/java/com/example/demo/mapper/RateMapper.java

package com.example.demo.mapper;


import com.example.demo.domain.entity.Rate;
import org.apache.ibatis.annotations.*;
import org.apache.ibatis.annotations.Mapper;


import java.util.List;

@Mapper
public interface RateMapper {

    @Insert({
            "insert into rate",
            "(start_time,end_time,currency,exchange_rate,create_time,update_time,admin_id,flag)",
            "values",
            "(#{startTime},#{endTime},#{currency},#{exchangeRate},now(),#{updateTime},#{adminId},1)"
    })
//    获取自增主键
    @Options(useGeneratedKeys = true,keyColumn = "rate_id",keyProperty = "rateId")
    int insert(Rate rate);

    //软删除
    @Update({
            "update rate set flag = 0 where rate_id=#{rateId}"
    })
    int deleteById(Integer rateId);

    @Update({
            "<script>",
            "update rate",
            "<set>",
            "<if test='startTime!=null'>start_time=#{startTime},</if>",
            "<if test='endTime!=null'>end_time=#{endTime},</if>",
            "<if test='currency!=null and currency.length>0'>currency=#{currency},</if>",
            "<if test='exchangeRate!=null'>exchange_rate=#{exchangeRate},</if>",
            "<if test='updateTime!=null'>update_time=#{updateTime},</if>",
            "<if test='adminId!=null'>admin_id=#{adminId},</if>",
            "</set>",
            "where rate_id = #{rateId}",           "</script>"
    })
    int update(Rate rate);

    @Select({
            "select * from rate where rate_id=#{rateId}"
    })
    Rate selectById(Integer rateId);

    @Select({
            "<script>",
            "SELECT r.*, a.name AS adminName",
            "FROM rate r",
            "LEFT JOIN admin a ON r.admin_id = a.admin_id",
            "LEFT JOIN admin u ON r.admin_id = u.admin_id",
            "WHERE r.flag =1 ",
            "<if test='rateId != null'>AND r.rate_id = #{rateId}</if>",
            "<if test='startTime != null'>AND r.start_time &gt;= #{startTime}</if>",
            "<if test='endTime != null'>AND r.end_time &lt;= #{endTime}</if>",
            "<if test='currency != null and currency.length > 0'>AND r.currency LIKE CONCAT('%', #{currency}, '%')</if>",
            "<if test='exchangeRate != null'>AND r.exchange_rate LIKE CONCAT('%', #{exchangeRate}, '%')</if>",
            "<if test='updateTime != null'>AND r.update_time LIKE CONCAT('%', #{updateTime}, '%')</if>",
            "<if test='adminId != null'>AND r.admin_id = #{adminId}</if>",
            "<if test='updateId != null'>AND r.update_id = #{updateId}</if>",
            "</script>"

    })
    List<Rate> select(Rate rate);
}