Mybatis中实现oracle的批量插入、更新

oracle 实现在Mybatis中批量插入，下面测试可以使用，在批量插入中不能使用insert 标签，只能使用select标签进行批量插入，否则会提示错误

### Cause: java.sql.SQLSyntaxErrorException: ORA-00933: SQL 命令未正确结束
; bad SQL grammar []; nested exception is java.sql.SQLSyntaxErrorException: ORA-00933: SQL 命令未正确结束

• 批量插入方式一

<?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.attence.attence.dao.AttenceDao">
	<resultMap id="Attence" type="Attence">
		<id column="ATTENCEKEY" 	property="attenceKey"/>
		<result column="EPC" 		property="epc"/>
		<result column="ANT" 		property="ant"/>
		<result column="RSSI" 		property="rssi"/>
		<result column="DEVICE" 	property="device"/>
		<result column="CRC" 		property="crc"/>
		<result column="BCC" 		property="bcc"/>
		<result column="DATETIME" 	property="dateTime" />
	</resultMap>		

	<select id="insertAttence" parameterType="List">
		INSERT ALL
        <foreach collection="list" item="attence" index="index" separator="">
		into Attence(
			attenceKey,
			epc,
			ant,
			rssi,
			device,
			crc,
			bcc,
			dateTime
		)
		values
        (
        	#{attence.id},
        	#{attence.epc},
        	#{attence.ant},
        	#{attence.rssi},
        	#{attence.device},
        	#{attence.crc},
        	#{attence.bcc},
        	#{attence.dateTime}
        )
        </foreach>
        SELECT *
        FROM dual
	</select>
</mapper>

以上方式不支持oracle的主键序列方式。

• 批量插入方式二

<?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.attence.attence.dao.AttenceDao">
	<resultMap id="Attence" type="Attence">
		<id column="ATTENCEKEY" 	property="attenceKey"/>
		<result column="EPC" 		property="epc"/>
		<result column="ANT" 		property="ant"/>
		<result column="RSSI" 		property="rssi"/>
		<result column="DEVICE" 	property="device"/>
		<result column="CRC" 		property="crc"/>
		<result column="BCC" 		property="bcc"/>
		<result column="DATETIME" 	property="dateTime" />
	</resultMap>		

	<insert id="insertAttence" parameterType="java.util.List">
		insert into Attence(
			attenceKey,
			epc,
			ant,
			rssi,
			device,
			crc,
			bcc,
			dateTime
		)
                Select
                     SEQ_ATTENCE.NEXTVAL,a.*
                From (
                     <foreach collection="list" item="attence" index="index" separator="union all">
                     (
                          Select
                                #{attence.epc},
                                    #{attence.ant},
                                    #{attence.rssi},
                                    #{attence.device},
                                    #{attence.crc},
                                    #{attence.bcc},
                                    #{attence.dateTime}
                                    From dual
                            ) 

                      </foreach>
                )
       </insert>
       </mapper>

同时由于使用oracle的自增加序列，无法联合union all使用，会提示错误，必须加上select语句进行进一步封装。

1、传入的参数只有一个list时，则Mybatis映射collection的键名list，若传入含有其他参数，需要使用HashMap，同时键名为HashMap对应的键名。

2、传入的参数只有一个array时，则Mybatis映射collection的键名array，若传入含有其他参数，需要使用HashMap，同时键名为HashMap对应的键名。

• 传递包含有数组参数的多参数HashMap实现批量插入

	<select id="insertGuideVideoList" parameterType="HashMap">
 	    insert into Guide_Video(
				id,
				guideId,
				videoId
		)
		Select
			SEQ_Guide_Video.NEXTVAL ,#{guideId}, video.*
		From(
 	    <foreach collection="arrGuideVideo" item="videoId" index="index" separator="union all">
			Select
				#{videoId} videoId
			From dual
		</foreach>
		)video
	</select>	

arrGuideVideo是一个字符串数组，这里必须使用select标签，而不能使用insert标签。如果使用insert标签执行会提示语句未结束。

• 实现批量更新

	<update id="updateTest" parameterType="Test">
	    Begin
	         Update TST_TEST
			<set>
	            <if test="test.testName != null and test.testName!= ''">
	                TESTNAME 	= #{test.testName},
	            </if>

	            <if test="test.gatherKey != null and test.gatherKey!= ''">
	                GATHERKEY 	= #{test.gatherKey},
	            </if>	   

	            <if test="test.subjectKey != null and test.subjectKey!= ''">
	                SUBJECTKEY 	= #{test.subjectKey},
	            </if>	 	  

	            <if test="test.gradeKey != null and test.gradeKey!= ''">
	                GRADEKEY 	= #{test.gradeKey},
	            </if>	 

	            <if test="test.answerCount != null and test.answerCount!= ''">
	                answerCount 	= #{test.answerCount},
	            </if>	   

	            <if test="test.answerEndTime != null and test.answerEndTime!= ''">
	                answerEndTime 	= #{test.answerEndTime},
	            </if>	

	            <if test="test.answerTimeLength != null and test.answerTimeLength!= ''">
	                answerTimeLength 	= #{test.answerTimeLength},
	            </if>
			</set>
			Where testKey = #{testKey}
		End;
	</update>	

实现批量更新实际上就是 生成oracle语句的代码块，然后jdbc执行sql语句。