springboot 上传文件过大的500异常

1修改appliaction.properties

# 单个文件最大20m

spring.servlet.multipart.max-file-size=20MB

#一次请求最大100M

spring.servlet.multipart.max-request-size=100MB

如果配置文件为appliaction.yml的这样配置文件：

spring:
  servlet:
    multipart:
      maxFileSize: 20MB
      maxRequestSize: 100MB



500代码异常，在启动类的里追加

/**
 * 文件上传配置
 *
 * @return
 */
@Bean
public MultipartConfigElement multipartConfigElement() {

/*
          springBoot 1.0+ 推荐这种写法
            MultipartConfigFactory factory = new MultipartConfigFactory();
            //单个文件最大
            factory.setMaxFileSize("20480KB"); //KB,MB
            factory.setMaxFileSize("20480KB");
            /// 设置总上传数据总大小
            factory.setMaxRequestSize("102400KB");
            return factory.createMultipartConfig();

*/
            // springBoot 2.0+ 推荐这种写法，

            MultipartConfigFactory factory = new MultipartConfigFactory();
            //文件最大10M,DataUnit提供5中类型B,KB,MB,GB,TB
            factory.setMaxFileSize(DataSize.of(10, DataUnit.MEGABYTES));
            /// 设置总上传数据总大小10M
            factory.setMaxRequestSize(DataSize.of(100, DataUnit.MEGABYTES));
            return factory.createMultipartConfig();

}

这是我的启动类：

package com.tythin.tyboot.rest;

import org.apache.coyote.http11.AbstractHttp11Protocol;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.embedded.tomcat.TomcatConnectorCustomizer;
import org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory;
import org.springframework.boot.web.servlet.MultipartConfigFactory;
import org.springframework.boot.web.servlet.server.ServletWebServerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;

import com.tythin.tyboot.core.config.WebAutoConfiguration;

import javax.servlet.MultipartConfigElement;

@SpringBootApplication(exclude = { WebAutoConfiguration.class })
@EnableScheduling
@MapperScan(basePackages = "XXXX")
public class TybootRestApplication {

    public static void main(String[] args) {
        SpringApplication.run(TybootRestApplication.class, args);
    }

    @Configuration
    public class CorsConfig {
        private CorsConfiguration buildConfig() {
            CorsConfiguration corsConfiguration = new CorsConfiguration();
            corsConfiguration.addAllowedOrigin("*"); // 1允许任何域名使用
            corsConfiguration.addAllowedHeader("*"); // 2允许任何头
            corsConfiguration.addAllowedMethod("*"); // 3允许任何方法（post、get等）
            return corsConfiguration;
        }

        @Bean
        public CorsFilter corsFilter() {
            UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
            source.registerCorsConfiguration("/**", buildConfig()); // 4
            return new CorsFilter(source);
        }

        /**
         * 文件上传配置
         *
         * @return
         */
        @Bean
        public MultipartConfigElement multipartConfigElement() {

/*
          springBoot 1.0+ 推荐这种写法
            MultipartConfigFactory factory = new MultipartConfigFactory();
            //单个文件最大
            factory.setMaxFileSize("20480KB"); //KB,MB
            factory.setMaxFileSize("20480KB");
            /// 设置总上传数据总大小
            factory.setMaxRequestSize("102400KB");
            return factory.createMultipartConfig();

*/
            // springBoot 2.0+ 推荐这种写法，

            MultipartConfigFactory factory = new MultipartConfigFactory();
            //文件最大10M,DataUnit提供5中类型B,KB,MB,GB,TB
            factory.setMaxFileSize(DataSize.of(10, DataUnit.MEGABYTES));
            /// 设置总上传数据总大小10M
            factory.setMaxRequestSize(DataSize.of(100, DataUnit.MEGABYTES));
            return factory.createMultipartConfig();

        }
    }
}