SpringBoot is configured with jackson format, but it does not take effect

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/test?useSSL=false
    username: root
    password: root
    driver-class-name: com.mysql.jdbc.Driver
    platform: mysql

  jackson:
    date-format:  yyyy-MM-dd HH:mm:ss
    time-zone:  GMT+8

Jackson springboot java

Mar.13,2021

whether jackson dependency is introduced
try to put yyyy-MM-dd HH:mm:ss in single quotation marks, that is,

jackson:
    date-format:  'yyyy-MM-dd HH:mm:ss'
    time-zone:  GMT+8

SpringBoot already has classes that inherit from WebMvcConfigurationSupport, and @ Configuration, so configurations in yml or properties that are not supported will not take effect.

Custom configuration needs to be added to the subclass of WebMvcConfigurationSupport

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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-64f5-1c2c8db-33aef.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1c2c8db-33aef.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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