springboot上传文件过大的500异常解决

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();
    }
  }
}

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