How to implement global exception handling in Spring Boot?

2 years ago
William Carter
2 minutes

To implement global exception handling in Spring Boot, you can follow the steps below:

  1. Create a custom exception handling class that implements the HandlerExceptionResolver interface or extends the ResponseEntityExceptionHandler class. This class will handle all exception cases.
  2. In a custom exception handling class, override the resolveException method to handle different types of exceptions and return error messages or custom error responses.
  3. Create a global exception handler class under the @ControllerAdvice annotation to handle exceptions uniformly using the @ExceptionHandler annotation.
  4. In the global exception handler class, write the corresponding exception handling method to return the exception information to the front end in a suitable way.
  5. In the configuration class of Spring Boot, add the @EnableWebMvc annotation to enable the global exception handling feature of Spring Boot.

The example code is shown below:

@ControllerAdvice
@EnableWebMvc
public class GlobalExceptionHandler extends ResponseEntityExceptionHandler {

    @ExceptionHandler(Exception.class)
    public ResponseEntity<ErrorResponse> handleException(Exception ex) {
        // 处理异常并返回自定义的错误响应
        ErrorResponse errorResponse = new ErrorResponse(HttpStatus.INTERNAL_SERVER_ERROR.value(), "Internal Server Error");
        return new ResponseEntity<>(errorResponse, HttpStatus.INTERNAL_SERVER_ERROR);
    }
}

@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

In this way, when an exception occurs, the corresponding exception handling method in the global exception handler class will be automatically called to return a custom error response.

It is important to note that in the global exception handler class, you can handle different types of exceptions as needed. For example, you can create multiple @ExceptionHandler methods to handle different types of exceptions and return different error responses.

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