java - Spring中抛出404并重定向到自定义错误页面

Question

我有下面的异常处理程序，当找不到资源时，它会重定向到“notfound”页面。但是，在 apache 日志中，我没有看到 404 错误代码。有什么办法可以让这个异常处理程序抛出404错误吗？

@ExceptionHandler(UnknownIdentifierException.class)
public String handleUnknownIdentifierException(final UnknownIdentifierException e, final HttpServletRequest request)
{
    request.setAttribute("message", e.getMessage());
    return "forward:notfoundpage";
}

Answer 1

是的:

@ExceptionHandler(UnknownIdentifierException.class)
public String handleUnknownIdentifierException(final UnknownIdentifierException e, final HttpServletRequest request, final HttpServletResponse response)
{   response.setStatus(404);
    request.setAttribute("message", e.getMessage());
    return "forward:notfoundpage";
}

另一种方法是使用特殊注释来标记异常:

 @ResponseStatus(value=HttpStatus.NOT_FOUND, reason="No such Order")  // 404
    public class UnknownIdentifierException extends RuntimeException {
        // ...
    }

另一种方法是在处理程序本身的注释中指定错误代码:

  @ResponseStatus(value=HttpStatus.NOT_FOUND, reason="Data integrity violation")  
@ExceptionHandler(UnknownIdentifierException.class)
public String handleUnknownIdentifierException(final UnknownIdentifierException e, final HttpServletRequest request)
{
///

这是有关主题的长博文:https://spring.io/blog/2013/11/01/exception-handling-in-spring-mvc