55-mybatis dao 和 映射xml

注意点：

1.nested exception is org.apache.ibatis.binding.BindingException: Parameter 'record_id' not found. Ava

错误原因：

①可能是参数没有定义参数名，对应不上，可以如下：

public void deleteQues(@Param("id") String id);

②如果是对象则不要加：@Param(),应该入下：

public void addQues(Question2 question);

给一些例子吧，都是模仿着写就可以了。

	public int insertAnswerRemark(Answer ans);

	public List<PaperQuesAns> findRemarkList(@Param("id")String id, @Param("questionId")String questionId);
	
	public List<Question2> findAllQues(@Param("id")String id);

	public void saveEditQues(Question question);

	public void deleteQues(@Param("id")String id);

//	public void addQues(@Param("paperId")String paperId,@Param("level")String level);

	// 添加问题：
	public void addQues(Question2 question);

　　

<insert id="insertAnswerRemark" useGeneratedKeys="true" keyProperty="id">
		INSERT INTO db_answer(
			paperId, 
			questionId, 
			userId,
			answer,
			subTime,
			remark,
			level
		) VALUES (
			#{paperId}, 
			#{questionId}, 
			#{userId},
			#{answer}, 
			#{subTime},
			#{remark},
			#{level}
		)
	</insert>
	
	<select id="findRemarkList" resultType="PaperQuesAns">
		SELECT 
			a.paperId,
			a.questionId,
			u.name,
			a.remark,
			a.subTime 
		FROM db_answer a
		left join sys_user u on a.userId=u.id 
		where a.paperId=#{id} and a.questionId=#{questionId}
		ORDER BY a.subTime
	</select>

	<select id="findAllQues" resultType="Question">
		 SELECT
			*
		FROM
			db_question
		WHERE
			paperId = #{id}
		AND (
			a IS NOT NULL
			OR b IS NOT NULL
			OR c IS NOT NULL
			OR d IS NOT NULL
			AND (content IS NOT NULL)) order by (num+0)
				
	</select>

<update id="saveEditQues">	
		UPDATE db_question SET 
			content=#{content},
			num=#{num}, 
			a=#{a},
			b=#{b},
			c=#{c},
			d=#{d}
	   WHERE paperId = #{paperId} and id=#{id};
	</update>
	
	<update id="deleteQues">
		delete from db_question 
			WHERE id = #{id}
	</update>
	
	<insert id="addQues" useGeneratedKeys="true" keyProperty="id">
		INSERT INTO db_question2(
			qid,
			paperid,  
			content,
			<if test="remark != null">
				remark,
			</if>
			level,
			<if test="num != null">
				num,
			</if>
			ismust,
			type,
			min_num,
			max_num
		) VALUES (
			#{qid},  
			#{paperId},  
			#{content},  
			<if test="remark != null">
				#{remark},
			</if> 
			#{level},
			<if test="num != null">
				#{num},
			</if>
			#{ismust},
			#{type},
			#{minNum},
			#{maxNum}
		)
	</insert>

　　

<?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.ctgu.collegeservice.dao.UserDao">

	<insert id="insertUser"
		parameterType="com.ctgu.collegeservice.entity.User" useGeneratedKeys="true"
		keyProperty="id">
		INSERT INTO
		user(username,password,nickname,name,studentid)
		values(#{username},#{password},#{name},#{name},#{studentid})
	</insert>

	<select id="findUserBySome" parameterType="com.ctgu.collegeservice.entity.User" resultType="com.ctgu.collegeservice.entity.User">
		SELECT * FROM user
		<where>
			<if test="id != null">
				and id = #{id}
			</if>
			<if test="username != null">
				and username = #{username}
			</if>
			<if test="name != null">
				and name like'%${name}%'
			</if>
			<if test="studentid != null">
				and studentid = #{studentid}
			</if>
		</where>
	</select>
	
	<select id="findAllUser" resultType="com.ctgu.collegeservice.entity.User">
		SELECT * FROM user
	</select>
	
	<select id="findUserByUsername" parameterType="String" resultType="com.ctgu.collegeservice.entity.User">
		SELECT * FROM user WHERE username = #{value}
	</select>
	
	<select id="findUserByStudentid" parameterType="String" resultType="com.ctgu.collegeservice.entity.User">
		SELECT * FROM user WHERE studentid = #{value}
	</select>
	
	<update id="updateUser" parameterType="com.ctgu.collegeservice.entity.User" keyProperty="id" useGeneratedKeys="true">
		UPDATE user
		<set>
			<if test="username != null">username=#{username},</if>
			<if test="password != null">password=#{password},</if>
			<if test="name != null">name=#{name},</if>
			<if test="nickname != null">nickname=#{nickname},</if>
			<if test="sex != null">sex=#{sex},</if>
			<if test="age  != null">age =#{age },</if>
			<if test="school  != null">school =#{school },</if>
			<if test="summary  != null">summary =#{summary },</if>
			<if test="status != null">status =#{status },</if>
		</set>
		where id = #{id}
	</update>
</mapper>