Spring boot unified time zone

8 hour question

Phenomenon

• The time of inserting into the database is inconsistent with the input from the front end
• Inconsistencies displayed by database queries to the front end

reason

• Database time zone, software environment time zone, mysql-connector-java time zone, time-zone set by @RequestBody and @ResponseBody

Solution

• unified time zone
• database time zone

show variables like '%time_zone%';
查询结果为表示东八区(也就是咱们用的)
'time_zone','+08:00'

• software environment time zone

//linux
date -R
查询结果为表示东八区(也就是咱们用的)
Wed, 20 May 2020 21:50:23 +0800

• mysql-connector-java connection settings

spring:
  #数据源
  datasource:
  #serverTimezone=Asia/Shanghai 设置东八区
    url: jdbc:mysql://ip:端口/db?useUnicode=true&characterEncoding=utf8&useSSL=true&serverTimezone=Asia/Shanghai

• If you use json front-end interaction

序列化和反序列化的时候设置日期的处理
spring:
  jackson:
    time-zone: GMT+8