Message
+Message_Id : int+Message_Content : string+Message_Time : DateTime+Message_Friend_Id : string+Message_Leave_Id : int+Message_User_Id : string+Message_User_Name : string+Message_Look_Flag : int
类
+ attribute1:type = defaultValue+ attribute2:type- attribute3:type
+ operation1(params):returnType- operation2(params)- operation3()
Group
+User_Id : string+Group_Id : int+Groud_Name : string+Group_Friend_Num : int
Comment
+Comment_Id：int+Photo_Id：int+Reply_Id：int+Comment_Content：string+Comment_Time：DateTime+Comment_Flag：int
Friend
+User_Id : string+Follow_Id : string+Groud_Id : int+Follow_Id_Remark : string
PhotoShare
+Id : int+Photo_Share_Id : string+Photo_Id : int+Photo_Src : string+Photo_Share_Time : DateTime+Photo_Share_Flag : int+User_Id : string+User_Name : string
Photo
+Photo_Id : int+Photo_Src : string+Photo_Time : DateTime+album_id：int+Photo_Describe_Id : string+Photo_Like : int+Photo_Label : int
