2019 Course Design twentieth day

Completed today:

Userlist table to add a new property;

Test it on the drop-down box to distinguish adress property;

JSP logic processing difficult waste a long time;

Tomorrow objectives:

To look ordering system upgrade, the database entry for each dish are not in the local as much as possible of data;

Reconsider the orders page needs to function;

Evaluation of new orders plus button;

Personal Summary:

JSP logic processing is really in trouble, but I'm too lazy to learn script;

Today an array of objects null pointer anomaly;

Record error:

List [] userlist=new list [flag];

for(int i=0;i<k;i++){

userlist [i] = new List (); // this step is not a null pointer exception;　　

}