增加异常处理的页面 This application has no explicit mapping for /error, so you are seeing this as a fallback.
时间: 2023-09-25 16:07:05 浏览: 34
增加异常处理的页面可以通过配置错误页面映射来实现。在Spring框架中,可以使用`@ControllerAdvice`注解来定义一个全局的异常处理类,该类可以捕获应用程序中抛出的所有异常。然后,通过使用`@ExceptionHandler`注解来定义处理特定异常的方法。在这些方法中,你可以返回一个自定义的错误页面或错误消息。
以下是一个示例代码:
```java
@ControllerAdvice
public class GlobalExceptionHandler {
@ExceptionHandler(Exception.class)
public ModelAndView handleException(Exception ex) {
// 处理异常并返回自定义的错误页面
ModelAndView modelAndView = new ModelAndView("error");
modelAndView.addObject("errorMessage", "发生了一个未知的错误,请稍后重试。");
return modelAndView;
}
@ExceptionHandler(NullPointerException.class)
public ModelAndView handleNullPointerException(NullPointerException ex) {
// 处理空指针异常并返回自定义的错误页面
ModelAndView modelAndView = new ModelAndView("error");
modelAndView.addObject("errorMessage", "发生了空指针异常,请检查您的代码。");
return modelAndView;
}
}
```
在上述代码中,`handleException`方法处理所有的异常,而`handleNullPointerException`方法只处理空指针异常。在这些方法中,我们返回一个带有错误消息的`ModelAndView`对象,该对象指定了要显示的错误页面。
请注意,你需要根据你的应用程序的具体需求来定义和配置异常处理类,并确保在Spring配置文件中启用全局异常处理。
通过这种方式,当应用程序抛出异常时,Spring将自动调用相应的异常处理方法,并显示自定义的错误页面。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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