Question

我想处理org.apache.commons.fileupload.FileUploadBase.SizeLimitExceededException

我的application.properties文件包含：

spring.http.multipart.max-file-size=2MB
spring.http.multipart.max-request-size=2MB
spring.mvc.throw-exception-if-no-handler-found=true

我尝试使用以下代码处理异常：

@ControllerAdvice
public class ExceptionHandlerRestController
{
    @ExceptionHandler(FileUploadBase.SizeLimitExceededException.class)
     public ResponseEntity<Object>exceptionHandler(FileUploadBase.SizeLimitExceededException e) {
        return new ResponseEntity<Object>("size limit exceeded",new HttpHeaders(), HttpStatus.NOT_ACCEPTABLE);
  }
}

虽然我已经处理了异常，但我收到了异常

Servlet.service() for servlet [dispatcherServlet] in context with path [] 
threw exception [Request processing failed; nested exception is 
org.springframework.web.multipart.MultipartException: Could not parse 
multipart servlet request; org.apache.tomcat.util.http.fileupload.FileUploadBase$SizeLimitExceededException: the request was rejected because its size (5838334) exceeds the configured maximum (2097152)

如何自定义上面的类来处理异常？

Answer 1

使用以下代码解决问题

@ExceptionHandler(MultipartException.class)
@ResponseBody
@ResponseStatus(HttpStatus.PAYLOAD_TOO_LARGE)
public ApiError multipartExceptionHandler(MultipartException e)
{
    Throwable th = e.getCause();
    if( th instanceof IllegalStateException )
    {
        Throwable cause = th.getCause();
        if(cause instanceof  SizeLimitExceededException)
        {
            SizeLimitExceededException ex = (SizeLimitExceededException) cause;
            return new ApiError(HttpStatus.PAYLOAD_TOO_LARGE.value(),"Total size of file(s) should not be more than " + (int)(ex.getPermittedSize()/Math.pow(2, 20)) + " MB");
        }
    }
    return new ApiError(HttpStatus.PAYLOAD_TOO_LARGE.value(),e.getMessage());
}

Answer 2

尝试更新容器配置，如果您正在使用tomcat，请使用以下配置更新server.xml文件

<Connector connectionTimeout="20000" 
           port="8080" 
           protocol="HTTP/1.1" 
           redirectPort="8443" 
           maxPostSize="52428800" />

将maxPostSize设置为52428800会将上传文件大小增加到50 MB。默认情况下，它设置为2 MB。

有关详细说明，请阅读：https://tomcat.apache.org/tomcat-7.0-doc/config/http.html

该请求被拒绝，因为其大小（5838334）超过了配置的最大值（2097152）

2 个答案: