正确的在拦截器里调用DBManager调用MySql

Signed-off-by: shines77 <gz_shines@msn.com>
initDataSource(ServletContext servletContext, Properties dbProperties);改为静态方法.

Signed-off-by: shines77 <gz_shines@msn.com>
改进了一下DBManager的初始化

Signed-off-by: shines77 <gz_shines@msn.com>
添加支持文件上传, 以及最大上传文件大小的设置.

Signed-off-by: shines77 <gz_shines@msn.com>
添加了 commons-fileupload-1.2.2.jar 库

Signed-off-by: shines77 <gz_shines@msn.com>
Merge branch 'next'