Database :
数据库：
`--> product table
id name cid uploadKey
1 Cemera 1 7365
2 Notebook 2 7222`
`--> category table
id catename
1 canon
2 toshiba`
`--> attactments table
id uploadKey filepath
1 7365 /img/jdf.png
2 7365 /img/sdsd.jpg`
`--> product table
id name
