Spring mvc文件上传过大异常处理

Spring mvc文件上传过大异常捕获处理：
PS：去掉Spring文件大小属性，使用拦截器的方式来判断文件大小是否超过限制

1.上传配置：

<!-- 配置文件上传类型解析器 multipartResolver-->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver" />

2.添加文件上传拦截器

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.servlet.ServletRequestContext;
import org.springframework.web.multipart.MaxUploadSizeExceededException;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
 
/**
 * @ClassName: FileUploadInterceptor 
 * @Description: 文件上传拦截过滤
 */
public class FileUploadInterceptor implements HandlerInterceptor {
    //文件大小
    private long maxSize;
 
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        if(request!=null && ServletFileUpload.isMultipartContent(request)) {
            ServletRequestContext ctx = new ServletRequestContext(request);
            long requestSize = ctx.contentLength();
            if (requestSize > maxSize) {
                throw new MaxUploadSizeExceededException(maxSize);
            }
        }
        return true;
    }
 
 
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
 
    }
 
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
    }
 
    public void setMaxSize(long maxSize) {
        this.maxSize = maxSize;
    }
}

3.添加异常处理类

/**
 * @ClassName: GlobalExceptionHandler 
 * @Description: 全局异常处理类
 */
@RestControllerAdvice
public class GlobalExceptionHandler {
    private static final Log logger = LogFactory.get();
 
    /**
     * @Description: 文件上传过大异常
     * @param ex
     * @return
     */
    @ExceptionHandler(MaxUploadSizeExceededException.class)
    @ResponseBody
    public BaseResult processException(MaxUploadSizeExceededException ex) {
        logger.error(ex.getMessage(), ex);
        //自定义信息返回给调用端
        return new BaseResult("413", "文件过大!");
    }
    
 
}

配置完成，可以捕获文件上传中因文件过大引起的错误，自定义返回错误信息！