& lt input? type="checkbox "？ name="bookID "？ value=" 1 "？ /& gt；

& lt input? type="text "？ Name= "book number"? /& gt；

& lt input? type="checkbox "？ name="bookID "？ value="2 "？ /& gt；

& lt input? type="text "？ Name= "book number"? /& gt；

& lt input? type="checkbox "？ name="bookID "？ value="3 "？ /& gt；

& lt input? type="text "？ Name= "book number"? /& gt； Fill in the above form and submit it to the fourth page for processing:

& lt%

String[]？ bookIDs？ =? request . getparametervalues(" bookID ")；

String[]？ Book number? =? request . getparametervalues(" book numbers ")；

//Since each check box corresponds to a quantity box, you only need to traverse one.

for(int？ Me? =? 0; ? Me? & lt？ bookIDs.length？ i++){

Out.println ("book? ID:“？ +? bookIDs[I])；

The value of the//checkbox//is the id of the stored book, and you can query the book information here.

Out.println ("book? Money: "? +? Book number [i]? *? Book price);

}

%> that's basically it. You improvise. BookNumber may submit blank data to bookNumber due to the different selection positions of multi-selection boxes. You can only empty null or ""data in the string [].