Spring's ControllerAdvice annotation usage

The @ControllerAdvice annotation is generally used to handle system errors, intercept error messages, and return to the error reporting interface to prevent users from seeing the error message!

talk is cheap, show me the code, as follows:

import org.springframework.ui.Model;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.context.request.NativeWebRequest;

/**
 * 1. The global configuration for the controller can be placed in the same location through the @ControllerAdvice annotation.
 * 2. The methods of classes annotated with @Controller can be annotated with @ExceptionHandler, @InitBinder, and @ModelAttribute.
 * 3. The @ControllerAdvice annotation will apply to all controller methods annotated with @RequestMapping.
 * 4. @ExceptionHandler: used to handle exceptions in the controller globally.
 * 5. @InitBinder: used to set the WebDataBinder, which is used to automatically bind the foreground request parameters to the Model.
 * 6. @ModelAttribute: The original function is to bind the key-value pair to the Model. Here, the global @RequestMapping can obtain the key-value pair set here
 *
 * @author zx
 * @date 2017-03-10
 */
@ControllerAdvice
public class GlobalControllerInterceptor
{
	@ModelAttribute
	//Apply to all @RequestMapping annotation methods
	//Add the key-value pair to the global here, and any method annotated with @RequestMapping can get this key-value pair
    public void addUser(Model model) {
		model.addAttribute("msg", "Add the key-value pair to the global here, any method annotated with @RequestMapping can get this key-value pair");
    }  
  
    @InitBinder  
    //Applies to all @RequestMapping annotated methods, initializes the data binder before its execution
    //Used to set the WebDataBinder, used to automatically bind the foreground request parameters to the Model.
    public void initBinder(WebDataBinder binder) {  
    }  
  
    @ExceptionHandler(Exception.class)  
    //Apply to all @RequestMapping annotated methods and execute when it throws an Exception
    //Define global exception handling, value attribute can filter interception conditions, intercept all Exceptions here
    public String processUnauthenticatedException(NativeWebRequest request, Exception e) {  
        return "error"; //return a logical view name  
    }  
}

Project address: https://github.com/zhangxia1030/spring-boot-example