springboot application.properties

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verify if you have this items:@Beanpublic CommonsMultipartResolver multipartResolver() {CommonsMultipartResolver multipart = new CommonsMultipartResolver();multipart.setMaxUploadSize(3 * 1024 * 1024);return multipart;}@Bean@Order(0)public MultipartFilter multipartFilter() {MultipartFilter multipartFilter = new MultipartFilter();multipartFilter.setMultipartResolverBeanName("multipartResolver");return multipartFilter;}and in the pplications.properties# MULTIPART (MultipartProperties)spring.http.multipart.enabled=true # Enable support of multi-part uploads.# spring.http.multipart.file-size-threshold=3 # Threshold after which files will be written to disk. Values can use the suffixed "MB" or "KB" to indicate a Megabyte or Kilobyte size.spring.http.multipart.location= /# Intermediate location of uploaded files.spring.http.multipart.max-file-size=10MB# Max file size. Values can use the suffixed "MB" or "KB" to indicate a Megabyte or Kilobyte size.spring.http.multipart.max-request-size=10MB# Max request size. Values can use the suffixed "MB" or "KB" to indicate a Megabyte or Kilobyte size.spring.http.multipart.resolve-lazily=false # Whether to resolve the multipart request lazily at the time of file or parameter access.

springboot application.properties