oracle 中MyBatis 批量插入大数据

oracle在进行大量数据批量插入时，若不进行分批次插入的话，则会报错

Cause: java.sql.SQLSyntaxErrorException: ORA-00913: 值过多

; bad SQL grammar []; nested exception is java.sql.SQLSyntaxErrorException: ORA-00913: 值过多

错误信息如上,正常情况而言,这个错误是因为  值个数 比 插入的列 个数多导致的

为了规避此问题，现进入分批插入操作，具体核心代码如下：

	try {
			            int a = 2000;//每次提交2000条
			            int loop = (int) Math.ceil(accountList.size() / (double) a);
			            List<AccountInfo> tempList = new ArrayList<>(a);
			            int start, stop;
			             for (int i = 0; i < loop; i++) {
				                tempList.clear();
				                 start = i * a;
				                 stop = Math.min(i * a + a - 1, accountList.size() - 1);
				                 System.out.println("range:" + start + " - " + stop);
				                 for (int j = start; j <= stop; j++) {
					                     tempList.add(accountList.get(j));
					                 }
				                 mapper.batchInsertAccountInfoUseSeq(tempList);

				                 System.out.println("已经插入" + (stop + 1) + " 条");
				             }

			             session.commit();
			             session.clearCache();

			         } catch (Exception e) {
			             e.printStackTrace();
			            session.rollback();
			         } finally {
			             if (session != null) {
				                 session.close();
				             }
			         }


		long end = System.currentTimeMillis();
		System.out.println("插入数据库执行时间 = " + (end - start1)/1000+"秒");

mapper.xml 文件中的sql 语句如下：

<insert id="batchInsertAccountInfoUseSeq" parameterType="java.util.List">
		<selectKey resultType="long" keyProperty="id" order="BEFORE"> 
            SELECT ACCOUNT_SEQ.NEXTVAL FROM dual
        </selectKey> 
		INSERT INTO ACCOUNT_INFO(ID, USERNAME,PASSWORD,GENDER, EMAIL,CREATE_DATE)
		SELECT ACCOUNT_SEQ.NEXTVAL, m.* FROM(
		<foreach collection="list" index="" item="accountInfo"
			separator="union all">
			select
			#{accountInfo.userName},
			#{accountInfo.password},
			#{accountInfo.gender},
			#{accountInfo.email},
			sysdate
			from dual
		</foreach>
		) m
	</insert>

测试100万条数据批量插入的时间为：