How to resolve the issue of Java SPI not being able to load the source code?

To fix the issue of Java SPI not loading the source code, you can try the following methods:

1. Check if the SPI configuration file is correct: Make sure that the SPI configuration file in the META-INF/services directory correctly specifies the fully qualified names of the relevant implementation classes.
2. Check the classpath to ensure that the SPI configuration file and the corresponding implementation class bytecode files are accessible in the classpath.
3. Checking the class loader: The Service Provider Interface (SPI) mechanism utilizes the thread’s context class loader. Loading SPI implementation classes and configuration files in different threads may result in loading failures. It is recommended to try using Thread.currentThread().getContextClassLoader() to obtain the context class loader.
4. Check the visibility of the SPI implementation class: Ensure that both the SPI implementation class and the SPI configuration file are public and not restricted from being accessed by other classes or modules.
5. Check the initialization of SPI implementation class: Ensure that if SPI implementation classes have dependencies, they have all been properly initialized and no exceptions have occurred.

If the above methods are not able to solve the issue, you can try using debugging tools to view detailed information during the loading process to help pinpoint the problem.