After tossing all afternoon, I began to think that it was the problem of using JPA warehouse. I replaced the simplest JPA repository, but it still couldn’t work. I checked online and tried the following methods:
Delete the version number;
Delete all the files in the folder (. M2) and then import the package again by Maven;
At a loss, I found that I had commented on the main startup class
@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
It’s equivalent to not allowing automatic injection of data source. Of course, entitymanagerfactory can’t be found…
Hope to be able to help small partners who encounter the same difficulties!
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