Detailed explanation of bean injection under spring multithreading

This paper introduces the detailed explanation of bean injection under spring multithreading and shares it with you as follows:

problem

The multithreaded injection of userthreadservice in spring is not included, and the userthreadservice is null exception is displayed

The code is as follows:

Solution I

Pass the service to be injected through the structure. The code is as follows:

Solution II

Get the required service from ApplicationContext

Spring loads its own defined applicationcontextholder class

Get the instance according to the name of the bean