Merge pull request !22 from 乾坤平台/master

2、密码放在前端md5加密

Merge pull request !21 from 乾坤平台/master

Merge pull request !20 from 乾坤平台/master

Merge pull request !19 from hsj/master

Merge pull request !18 from hsj/master

Merge pull request !17 from 乾坤平台/master

Merge pull request !16 from 乾坤平台/master

2、修复后端，查询列表为空时，程序异常问题

2、修复sql中大于小于少&出错的问题

(cherry picked from commit 36139e26)

(cherry picked from commit 36139e26)

(cherry picked from commit 36139e26)