您可以通过添加一个附加的Filter来捕获异常并重定向到错误页面来处理MaxUploadSizeExceededException。例如，您可以创建一个MultipartExceptionHandler过滤器，如下所示：
public class MultipartExceptionHandler extends OncePerRequestFilter {
@Override
protected void doFilterInternal(HttpServletRequest request,
HttpServletResponse response, FilterChain filterChain)
throws ServletException, IOException {
try {
filterChain.doFilter(request, response);
} catch (MaxUploadSizeExceededException e) {
handle(request, response, e);
} catch (ServletException e) {
if(e.getRootCause() instanceof MaxUploadSizeExceededException) {
handle(request, response, (MaxUploadSizeExceededException) e.getRootCause());
} else {
throw e;
}
}
}
private void handle(HttpServletRequest request,
HttpServletResponse response, MaxUploadSizeExceededException e) throws ServletException, IOException {
String redirect = UrlUtils.buildFullRequestUrl(request) + "?error";
response.sendRedirect(redirect);
}
}
：此重定向假设您的表单和上载。您可能需要修改重定向到的位置。具体来说，如果您遵循GET模式下的表单模式，并且在POST上对其进行处理，那么它将起作用。
然后，您可以确保在MultipartFilter之前添加此过滤器。例如，如果您使用的是web.xml，则会看到以下内容：
<filter>
<filter-name>meh</filter-name>
<filter-class>org.example.web.MultipartExceptionHandler</filter-class>
</filter>
<filter>
<description>
Allows the application to accept multipart file data.
</description>
<display-name>springMultipartFilter</display-name>
<filter-name>springMultipartFilter</filter-name>
<filter-class>org.springframework.web.multipart.support.MultipartFilter</filter-class>
<!--init-param>
<param-name>multipartResolverBeanName</param-name>
<param-value>multipartResolver</param-value>
</init-param-->
</filter>
<filter>
<description>
Secures access to web resources using the Spring Security framework.
</description>
<display-name>springSecurityFilterChain</display-name>
<filter-name>springSecurityFilterChain</filter-name>
<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>
<filter-mapping>
<filter-name>meh</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>springMultipartFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>springSecurityFilterChain</filter-name>
<url-pattern>/*</url-pattern>
<dispatcher>ERROR</dispatcher>
<dispatcher>REQUEST</dispatcher>
</filter-mapping>
然后，在表单中，您可以通过检查HTTP参数错误是否存在来检测错误是否发生。例如，在JSP中，您可以执行以下操作：
<c:if test="${param.error != null}">
<p>Failed to upload...too big</p>
</c:if>
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