在使用mybatis执行批量更新(update foreach)数据的时候报错如下：
org.springframework.jdbc.BadSqlGrammarException:
### Error updating database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '......
### The error may involve ....
### The error occurred while setting parameters ### SQL:刚开始一直以为是自己SQL写错了，但是检查N遍，发现也没问题，而且到Navicat中执行也没说SQL报错，批量更新SQL如下：
<!--批量更新报表 -->
<update id="updateBatchUser" parameterType="java.util.List">
<foreach collection="userList" item="item" index="index" separator=";">
update sys_user
<set>
<if test="item.userName != null and item.userName!= ''">user_name = #{item.userName}, </if>
<if test="item.userNo != null">user_no = #{item.userNo }, </if>
...
updated_time = now()
</set>
where id = #{item.id}
</foreach>
</update>解决方案
MySQL的批量更新是要我们主动去设置的，使用mybatis进行批量插入与更新时，必须在配置连接url时加上 &allowMultiQueries=true 即可
jdbc:mysql://xx:3306/test?serverTimezone=Asia/Shanghai&characterEncoding=utf8&useSSL=false&rewriteBatchedStatements=true&allowMultiQueries=true
