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Tutorials > Spring MVC > Exception handling

Exception handling

Exception handling in Spring MVC is the process of handling exceptions that may occur during the execution of a request. There are several ways to handle exceptions in Spring MVC, including the following:

  1. @ExceptionHandler annotation: You can use the @ExceptionHandler annotation on a method in a controller to handle specific exceptions. The method should have a single parameter of the exception type that you want to handle, and it should return a ModelAndView object or a view name.

For example, to handle the IllegalArgumentException exception:

 @Controller
public class MyController { ... @ExceptionHandler(IllegalArgumentException.class) public ModelAndView handleIllegalArgumentException(IllegalArgumentException ex) { ModelAndView modelAndView = new ModelAndView(); modelAndView.addObject("message", ex.getMessage()); modelAndView.setViewName("error"); return modelAndView; } }
  1. HandlerExceptionResolver interface: You can implement the HandlerExceptionResolver interface to create a global exception handler for your application. The implementation should have a method that takes an Exception object and returns a ModelAndView object.

For example, to create a global exception handler:

@Component
public class GlobalExceptionHandler implements HandlerExceptionResolver {
  ...
  
  @Override
  public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
    ModelAndView modelAndView = new ModelAndView();
    modelAndView.addObject("message", ex.getMessage());
    modelAndView.setViewName("error");
    return modelAndView;
  }
}
  1. @ControllerAdvice annotation: You can use the @ControllerAdvice annotation on a class to create a global exception handler that can handle exceptions across multiple controllers. The class should contain methods annotated with @ExceptionHandler to handle specific exceptions.

For example, to create a global exception handler:

@ControllerAdvice
public class GlobalExceptionHandler {
  ...
  
  @ExceptionHandler(IllegalArgumentException.class)
  public ModelAndView handleIllegalArgumentException(IllegalArgumentException ex) {
    ModelAndView modelAndView = new ModelAndView();
    modelAndView.addObject("message", ex.getMessage());
    modelAndView.setViewName("error");
    return modelAndView;
  }
}
With these techniques, you can effectively handle exceptions in your Spring MVC application and provide a meaningful response to the user in case of error.


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