MySQL not launching on XAMPP

今天打开xampp的mysql时报出了以下错误

2017-07-26 07:35:04 11048 [Note] Plugin 'FEDERATED' is disabled.
2017-07-26 07:35:04 2874 InnoDB: Warning: Using innodb_additional_mem_pool_size is DEPRECATED. This option may be removed in future releases, together with the option innodb_use_sys_malloc and with the InnoDB's internal memory allocator.
2017-07-26 07:35:04 11048 [Note] InnoDB: The InnoDB memory heap is disabled
2017-07-26 07:35:04 11048 [Note] InnoDB: Mutexes and rw_locks use Windows interlocked functions
2017-07-26 07:35:04 11048 [Note] InnoDB: Compressed tables use zlib 1.2.3
2017-07-26 07:35:04 11048 [Note] InnoDB: Not using CPU crc32 instructions
2017-07-26 07:35:04 11048 [Note] InnoDB: Initializing buffer pool, size = 16.0M
2017-07-26 07:35:04 11048 [Note] InnoDB: Completed initialization of buffer pool
2017-07-26 07:35:04 11048 [Note] InnoDB: Highest supported file format is Barracuda.
2017-07-26 07:35:04 11048 [Note] InnoDB: The log sequence numbers 0 and 0 in ibdata files do not match the log sequence number 1735445 in the ib_logfiles!
2017-07-26 07:35:04 11048 [Note] InnoDB: Database was not shutdown normally!
2017-07-26 07:35:04 11048 [Note] InnoDB: Starting crash recovery.
2017-07-26 07:35:04 11048 [Note] InnoDB: Reading tablespace information from the .ibd files...
2017-07-26 07:35:04 11048 [ERROR] InnoDB: Attempted to open a previously opened tablespace. Previous tablespace how2java/category_ uses space ID: 1 at filepath: .\how2java\category_.ibd. Cannot open tablespace mysql/innodb_table_stats which uses space ID: 1 at filepath: .\mysql\innodb_table_stats.ibd
InnoDB: Error: could not open single-table tablespace file .\mysql\innodb_table_stats.ibd
InnoDB: We do not continue the crash recovery, because the table may become
InnoDB: corrupt if we cannot apply the log records in the InnoDB log to it.
InnoDB: To fix the problem and start mysqld:
InnoDB: 1) If there is a permission problem in the file and mysqld cannot
InnoDB: open the file, you should modify the permissions.
InnoDB: 2) If the table is not needed, or you can restore it from a backup,
InnoDB: then you can remove the .ibd file, and InnoDB will do a normal
InnoDB: crash recovery and ignore that table.
InnoDB: 3) If the file system or the disk is broken, and you cannot remove
InnoDB: the .ibd file, you can set innodb_force_recovery > 0 in my.cnf
InnoDB: and force InnoDB to continue crash recovery here.

其中有一行出现了error，然后下面具体解释了解决方案是什么，也就是这一行：

InnoDB: Error: could not open single-table tablespace file .\mysql\innodb_table_stats.ibd

这个错误可以按照解决方案来做，然后
https://stackoverflow.com/questions/19211817/mysql-not-launching-on-xampp
也有人翻译了一下说具体怎么做
但是都不好用，在最后一条回复的地方发现是好用的，也就是
exit Xampp server go to your C:\xampp\mysql\data directory delete the ibdata1 file restart xampp server It should work
即退出xampp，然后删除D:\xampp\mysql\data\ibdata1文件，重启xampp就好了

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