Spring Boot 文件上传大小限制，The field file exceeds its maximum permitted size of 1048576 bytes.
74.5 Handling Multipart File Uploads
Spring Boot embraces the Servlet 3 javax.servlet.http.Part API to support uploading files. By
default Spring Boot configures Spring MVC with a maximum file of 1MB per file and a maximum of
10MB of file data in a single request. You may override these values, as well as the location to which
intermediate data is stored (e.g., to the /tmp directory) and the threshold past which data is flushed to
disk by using the properties exposed in the MultipartProperties class. If you want to specify that
files be unlimited, for example, set the spring.http.multipart.max-file-size property to -1.
The multipart support is helpful when you want to receive multipart encoded file data as a
@RequestParam-annotated parameter of type MultipartFile in a Spring MVC controller handler
method.
See the MultipartAutoConfiguration source for more details.
Spring Boot 1.3.x或者之前
multipart.maxFileSize=xxMb
multipart.maxRequestSize=xxMb
Spring Boot 1.4.x或者之后
spring.http.multipart.maxFileSize=xxMb
spring.http.multipart.maxRequestSize=xxMb