Springmvc request collection type parameters

my front end submitted an array type parameter to the back-end deleteFile method, but the corresponding list did not receive a value. I would like to ask how to solve this problem.

Code is shown in figure:
Front end:

:

:

For the time being, the solution is to encapsulate a pojo, for the parameter and then the get method takes the list, but this is stupid.
https://blog.csdn.net/yufeiya.

Feb.28,2021
The

parameter should not be fields [0], fields [1]. . Right? I think it's fields=1&fields=2&fields=3. . Like this.

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1bc9834-44f18.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bc9834-44f18.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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