Send multi-dimensional array request param to server [duplicate]

Question

Basically I will not do this if I have control in the front end, but when I am using DataTable ajax feature, they post the data like this:

columns[0][data]:0
columns[0][name]:
columns[0][searchable]:true
columns[0][orderable]:true
columns[0][search][value]:
columns[0][search][regex]:false
columns[1][data]:1
columns[1][name]:
columns[1][searchable]:true
columns[1][orderable]:true
columns[1][search][value]:
columns[1][search][regex]:false
columns[2][data]:2
columns[2][name]:
columns[2][searchable]:true
columns[2][orderable]:true
columns[2][search][value]:
columns[2][search][regex]:false
columns[3][data]:3
columns[3][name]:
columns[3][searchable]:true
columns[3][orderable]:true
columns[3][search][value]:
columns[3][search][regex]:false
columns[4][data]:4
columns[4][name]:

I have 2 questions:

1) how can I retrieve the value accordingly in servlet? getParameterValues can only get 1 dimensional array, I not sure how to retrieve the example above.

2) how can I retrieve the value if I am using Spring MVC?

I'm afraid you will have to use getParameterNames() or getParameterMap() and iterate over all of the parameters above. You see request.getParameterValues() will give you multiple values if exactly the same parameter is specified more than once: given http://x.com/aaa?p=1&p=2&p=3, request.getParameterValues("p") returns ["1","2","3"] (always a string array). — Nikos Paraskevopoulos
– Nikos Paraskevopoulos, Commented Apr 9, 2017 at 19:34
@BalusC, I have asked how to do that in Spring MVC, does this stackoverflow.com/questions/6967258/… answer my question? — Sam YC
– Sam YC, Commented Apr 11, 2017 at 2:41

Community · Accepted Answer · 2017-05-23 12:25:33Z

0

OK, I roughly found the answer although it is not perfect:

1) I am confused about the array parameters, in fact, posting the data as above, it is not array parameters, I can purely extract the value via string, like this.

2) For Spring MVC, I still can't find a way to convert request to an object, so for simplicity, I rather to receive the request param in @RequestParam Map<String, String> params, and iterate over each key. (Thanks @Nikos Paraskevopoulos for highlighting)

edited May 23, 2017 at 12:25

CommunityBot

11 silver badge

answered Apr 10, 2017 at 2:49

Sam YC

11.8k22 gold badges114 silver badges165 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Send multi-dimensional array request param to server [duplicate]

1 Answer 1

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Linked

Related