How to resolve the issue of Spring Boot not receiving parameters?

1 year ago
Jackson Davis
2 minutes

If parameters cannot be received in a Spring Boot application, it may be due to the following reasons:

  1. Parameters name mismatch: Make sure the names of the parameters in the request match the names of the parameters expected by the backend method. You can use the @RequestParam annotation to specify parameter names, or use the @RequestBody annotation to convert the request body into an object.
  2. Parameter type mismatch: Please make sure that the parameter types in the request match the parameter types expected by the backend method. For primitive types, you can use the @RequestParam annotation to specify the parameter type; for complex objects, you can use the @RequestBody annotation to convert the request body into an object.
  3. The request method does not match: Make sure the request method aligns with the method in the backend that is receiving the parameters. For example, if the backend method uses the @GetMapping annotation, it can only accept GET requests.
  4. The requested path does not match: Make sure that the path of the request matches the path specified in the method that receives the parameters from the backend. You can use the @RequestMapping annotation to specify the method’s path, or simplify path specification using annotations like @GetMapping, @PostMapping, etc.
  5. Request parameter not passed: Please ensure that the correct parameters are passed in the request. You can print the request parameters or use a debugging tool to check if the request is correct.

If the above methods do not solve the problem, you can refer to the following steps for troubleshooting:

  1. You can check if the request reaches the backend method by printing logs or setting breakpoints in the method for debugging.
  2. Check if the configuration file of the project is correct, such as whether automatic assembly is enabled, whether the correct request handlers are configured, etc.
  3. Make sure that the dependencies of the project are correctly imported, such as Spring MVC, Jackson, and other relevant dependencies.
  4. If tools such as Swagger are used, you can check if the interface documents are generated correctly to determine if it is an issue with parameter reception.

If the above methods still don’t solve the problem, you can provide more code and detailed error information to better help you solve the issue.

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