【mybatis】mybatis进行批量更新，报错：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

使用mybatis进行批量更新操作：

报错如下：

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 'update
                goods g
            SET
                update_date = '2019-03-19 17:16:05.918',
                updat' at line 28

但是检查了以后，28行并没有错误

使用【https://www.cnblogs.com/sxdcgaq8080/p/9100178.html】 打印了sql，发现sql如下，也没有问题：

UPDATE goods
SET update_date = '2019-03-19 17:12:30',
 update_id = 'defUserId',
 enabled = 1,
 NAME = '李钢的屏幕维修服务',
 py_all = 'ligangdepingmuweixiufuwu',
 py_head = 'lgdpmwxfw',
 outer_code = '345345345345',
 mnemonic_code = '',
 del_flag = 0,
 enabled_flag = 1,
 goods_type_uid = 'a5cd4e8cc75456e7',
 url = '',
 bar_cide = '',
 sale_price = NULL,
 integral = 0,
 scan_name = '李钢的屏幕维修服务',
 brand_uid = '01',
 en_name = '李钢的屏幕维修服务'
WHERE
    outer_id = '345345345345'
AND tenement_id = 'test_tenement_123';
 
UPDATE goods
SET update_date = '2019-03-19 17:12:30',
 update_id = 'defUserId',
 enabled = 1,
 NAME = '黑莓798',
 py_all = 'heimei798',
 py_head = 'hm798',
 outer_code = '453975973361094656',
 mnemonic_code = '',
 del_flag = 0,
 enabled_flag = 1,
 goods_type_uid = 'a5cd4e8cc75456e7',
 url = '',
 bar_cide = '',
 sale_price = NULL,
 integral = 0,
 scan_name = '黑莓798',
 brand_uid = '01',
 en_name = '黑莓798'
WHERE
    outer_id = '453975973361094656'
AND tenement_id = 'test_tenement_123';
 
UPDATE goods
SET update_date = '2019-03-19 17:12:30',
 update_id = 'defUserId',
 enabled = 1,
 NAME = '测试商品',
 py_all = 'ceshishangpin',
 py_head = 'cssp',
 outer_code = 'CS001',
 mnemonic_code = '',
 del_flag = 0,
 enabled_flag = 1,
 goods_type_uid = 'a5cd4e8cc75456e7',
 url = '',
 bar_cide = '',
 sale_price = NULL,
 integral = 0,
 scan_name = '测试商品',
 brand_uid = '01',
 en_name = 'test
product'
WHERE
    outer_id = 'CS001'
AND tenement_id = 'test_tenement_123'

报错原因：

是因为spring boot配置文件中，关于数据库的连接配置，并没有允许进行批量更新的操作

解决方法：

将数据库配置修改为 
jdbc.url=jdbc:mysql://127.0.0.1:3306/datebase?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&allowMultiQueries=true
 
新增了 &allowMultiQueries=true 意为 允许批量更新

需要注意的是：

加了&allowMultiQueries=true 意为 允许批量更新
 
但是此时如果再想在spring boot中运行mybatis的时候想打印出来sql，就已经不起作用了。
 
此时按照
https://www.cnblogs.com/sxdcgaq8080/p/9100178.html
配置的，在spring boot中打印sql语句，就无效了