MultipartFile:The field file exceeds its maximum permitted size of 1048576 bytes

背景

MultipartFile 上傳文件出錯

public String uploadImg(@RequestParam("file") MultipartFile file, boolean flag) {
			String filePicUrl = "";
			String id ="";
			File files = null;
			files = FileUtil.createFiles(prefix +filePicUrl, id+".jpg");
			file.transferTo(files);
}

報錯

2020-05-22 21:06:24.236 [http-nio-5000-exec-1] DEBUG org.springframework.web.servlet.DispatcherServlet - Could not complete request
org.springframework.web.multipart.MaxUploadSizeExceededException: Maximum upload size exceeded; nested exception is java.lang.IllegalStateException: org.apache.tomcat.util.http.fileupload.FileUploadBase$FileSizeLimitExceededException: The field file exceeds its maximum permitted size of 1048576 bytes.
        at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.handleParseFailure(StandardMultipartHttpServletRequest.java:120)
        at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.parseRequest(StandardMultipartHttpServletRequest.java:113)
        at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.<init>(StandardMultipartHttpServletRequest.java:86)
        at org.springframework.web.multipart.support.StandardServletMultipartResolver.resolveMultipart(StandardServletMultipartResolver.java:93)
        at org.springframework.web.servlet.DispatcherServlet.checkMultipart(DispatcherServlet.java:1128)
        at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:960)
        at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)

原因

The field file exceeds its maximum permitted size of 1048576 bytes
錯誤顯示文件的大小超出了允許的範圍

查詢發現Spring Boot做了文件傳輸大小限制，可在配置中修改其默認值。

解決方案

在spring配置文件中加入如下配置：

#修改上傳文件無限制大小
spring.servlet.multipart.max-file-size = -1  
spring.servlet.multipart.max-request-size= -1