How to use rt.jar in jdk11

spring cloud project upgraded from 8 to 11.
my MAVEN 3.6, springboot 2.1.3, eclipse latest.
I have added a module-info file.
ask for advice!
how to use the jar package from the original rt.jar in 11

rt.jar

code/code
SpringBoot package


JDK


this is my project dependency

Eclipse jdk9 java
Jul.11,2022

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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-64f5-1bf5acb-317ea.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bf5acb-317ea.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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