SpringBoot上传文件大小受限问题的解决办法

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:121)
	at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.parseRequest(StandardMultipartHttpServletRequest.java:114)

#做限制的参数配置
spring:
  servlet:
    multipart:
      enabled: true #默认支持文件上传
      max-file-size: 20MB # 最大支持文件大小
      max-request-size: 30MB # 最大支持请求大小

#不做限制的参数配置
spring:
  servlet:
    multipart:
      enabled: true #默认支持文件上传
      max-file-size: -1 #不做限制
      max-request-size: -1 #不做限制

import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.web.servlet.MultipartConfigFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.util.unit.DataSize;
import javax.servlet.MultipartConfigElement;

/**
 * @author: 一宿君
 * @date: 2022-03-23 19:18:51
 * @description: 
 */
@Configuration
public class MultipartFileConfig {

    @Value("${config.multifile.maxFileSize}")
    private Long maxFileSize;
    @Value("${config.multifile.maxRequestSize}")
    private Long maxRequestSize;

    @Bean
    public MultipartConfigElement multipartConfigElement() {
        MultipartConfigFactory factory = new MultipartConfigFactory();
        /**
         * 单个数据大小，
         * DataSize.ofMegabytes(maxFileSize)默认是配置字节，将字节转化为MB
         */
        factory.setMaxFileSize(DataSize.ofMegabytes(maxFileSize));
        // 总上传数据大小
        factory.setMaxRequestSize(DataSize.ofMegabytes(maxRequestSize));
        return factory.createMultipartConfig();
    }
}