Springboot2.0 cannot import some packages into the pom file, as shown in the following figure

as shown below

the following packages show errors that cannot be imported. I don"t understand why

Pom java spring springboot

Jun.10,2022

< H2 > possible reasons < / H2 > < hr >

due to network problems, the jar package download terminal of the Maven warehouse generates * .lastUpdate files
- use the command to execute cmd under the maven repository
```
for /r %i in (*.lastUpdated) do del %i
```
the jar package applied by the project conflicts. You need to check the pom carefully to determine the specific problem

if maven failed to download jar, clean up the local mavenjar package, then use Aliyun acceleration, and then try downloading again.

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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-64f5-1e4c18b-5940e.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e4c18b-5940e.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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