RouteMapper.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.xasxt.tickect.dao.RouteMapper">
<resultMap type="RouteInfo" id="rm1">
	<id column="route_id" property="routeId"/>
	<result column="route_name" property="routeName"/>
	<result column="price" property="price"/>
	<result column="baggage_fee" property="baggaceFee"/>
	<result column="start_station" property="startStation"/>
	<result column="terminal_station" property="terminalStation"/>
	<result column="startname" property="startName"/>
	<result column="terminalname" property="terminalName"/>
</resultMap>
	<select id="getList" resultMap="rm1">
	 SELECT route_id,route_name,price,baggage_fee,start_station,terminal_station,t.station_name startname,st.station_name terminalname
    FROM routes r INNER JOIN stations t ON r.start_station=t.station_id
    INNER JOIN stations st ON r.terminal_station=st.station_id
	</select>
	<insert id="addRoute" parameterType="RouteInfo">
		  INSERT INTO routes
		  (route_id,route_name,price,baggage_fee,start_station,terminal_station)
   			VALUES(rount_id.NEXTVAL,
   			#{routeName},
   			#{price},
   			#{baggaceFee},
   			#{startStation},
   			#{terminalStation})
	</insert>
	<select id="getInfoByName" parameterType="string" resultMap="rm1">
		SELECT route_id,route_name,price,baggage_fee,start_station,terminal_station
   	    FROM routes 
   	    where route_name=#{routeName}
	</select>
</mapper>