Detailed explanation of Spring Boot unified exception handling example code
When we are doing web applications, it is very common for errors to occur during request processing. At this time, unified exception handling is needed. This article mainly introduces to you the relevant information on how Spring Boot implements unified exception handling. Friends in need can refer to it. Let’s take a look together.
Spring Boot has error mapping by default, but this error page is not very user-friendly.
Unified exception handling
Define a class for unified exception handling by using @ControllerAdvice instead of defining it one by one in each Controller.
@ExceptionHandler is used to define the function type that the function targets, and finally maps the Exception object and request URL to the URL.
@ControllerAdvice
class ExceptionTranslator {
public static final String DEFAULT_ERROR_VIEW = "error";
@ExceptionHandler(value = Exception.class)
public ModelAndView defaultErrorHandler(HttpServletRequest req, Exception e) throws Exception {
ModelAndView mav = new ModelAndView();
mav.addObject("exception", e);
mav.addObject("url", req.getRequestURL());
mav.setViewName(DEFAULT_ERROR_VIEW);
return mav;
}
}Implement error.html page display
Create error.html in the templates directory.
For example:
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8" />
<title>统一异常处理</title>
</head>
<body>
<h1>Error Handler</h1>
<p th:text="${url}"></p>
<p th:text="${exception.message}"></p>
</body>
</html>Return using Json format
Just add in @ Adding @ResponseBody after ExceptionHandler can convert the content of the processing function return into JSON format
Create a JSON return object, such as:
public class ErrorDTO implements Serializable {
private static final long serialVersionUID = 1L;
private final String message;
private final String description;
private List<FieldErrorDTO> fieldErrors;
//getter和setter省略
}Exception handling can be added for the specified Exception
@ExceptionHandler(ConcurrencyFailureException.class)
@ResponseStatus(HttpStatus.CONFLICT)
@ResponseBody
public ErrorDTO processConcurencyError(ConcurrencyFailureException ex) {
return new ErrorDTO(ErrorConstants.ERR_CONCURRENCY_FAILURE);
}ErrorConstants.ERR_CONCURRENCY_FAILURE is an exception message defined.
Summarize
The above is the detailed content of Detailed explanation of Spring Boot unified exception handling example code. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1389
52
C++ function exceptions and multithreading: error handling in concurrent environments
May 04, 2024 pm 04:42 PM
Function exception handling in C++ is particularly important for multi-threaded environments to ensure thread safety and data integrity. The try-catch statement allows you to catch and handle specific types of exceptions when they occur to prevent program crashes or data corruption.
What is the relationship between recursive calls and exception handling in Java functions?
May 03, 2024 pm 06:12 PM
Exception handling in recursive calls: Limiting recursion depth: Preventing stack overflow. Use exception handling: Use try-catch statements to handle exceptions. Tail recursion optimization: avoid stack overflow.
How does C++ exception handling support custom error handling routines?
Jun 05, 2024 pm 12:13 PM
C++ exception handling allows the creation of custom error handling routines to handle runtime errors by throwing exceptions and catching them using try-catch blocks. 1. Create a custom exception class derived from the exception class and override the what() method; 2. Use the throw keyword to throw an exception; 3. Use the try-catch block to catch exceptions and specify the exception types that can be handled.
How to handle exceptions in C++ Lambda expressions?
Jun 03, 2024 pm 03:01 PM
Exception handling in C++ Lambda expressions does not have its own scope, and exceptions are not caught by default. To catch exceptions, you can use Lambda expression catching syntax, which allows a Lambda expression to capture a variable within its definition scope, allowing exception handling in a try-catch block.
Exception handling in C++ technology: How to handle exceptions correctly in a multi-threaded environment?
May 09, 2024 pm 12:36 PM
In multithreaded C++, exception handling follows the following principles: timeliness, thread safety, and clarity. In practice, you can ensure thread safety of exception handling code by using mutex or atomic variables. Additionally, consider reentrancy, performance, and testing of your exception handling code to ensure it runs safely and efficiently in a multi-threaded environment.
PHP exception handling: understand system behavior through exception tracking
Jun 05, 2024 pm 07:57 PM
PHP exception handling: Understanding system behavior through exception tracking Exceptions are the mechanism used by PHP to handle errors, and exceptions are handled by exception handlers. The exception class Exception represents general exceptions, while the Throwable class represents all exceptions. Use the throw keyword to throw exceptions and use try...catch statements to define exception handlers. In practical cases, exception handling is used to capture and handle DivisionByZeroError that may be thrown by the calculate() function to ensure that the application can fail gracefully when an error occurs.
How do you handle exceptions effectively in PHP (try, catch, finally, throw)?
Apr 05, 2025 am 12:03 AM
In PHP, exception handling is achieved through the try, catch, finally, and throw keywords. 1) The try block surrounds the code that may throw exceptions; 2) The catch block handles exceptions; 3) Finally block ensures that the code is always executed; 4) throw is used to manually throw exceptions. These mechanisms help improve the robustness and maintainability of your code.
Exception handling in C++ technology: How to optimize the performance of exception handling?
May 09, 2024 am 10:39 AM
In order to optimize exception handling performance in C++, the following four techniques can be implemented: Avoid unnecessary exception throwing. Use lightweight exception classes. Prioritize efficiency and design exception classes that contain only necessary information. Take advantage of compiler options to achieve the best balance of performance and stability.
