解除spring-boot上传图片大小的限制

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• 由spring官方文档可知，spring-boot在MultipartProperties配置文件中对最大上传大小做了限制需要在启动时增加一个配置类

• 在启动类里增加以下类即可解决问题

  /**
   * 解除上传文件的限制
   */
  @Configuration
  @ConditionalOnClass({Servlet.class, StandardServletMultipartResolver.class,
          MultipartConfigElement.class})
  @ConditionalOnProperty(prefix = "spring.http.multipart", name = "enabled", matchIfMissing = true)
  @EnableConfigurationProperties(MultipartProperties.class)
  public class MultipartAutoConfiguration {
  
      private final MultipartProperties multipartProperties;
  
      public MultipartAutoConfiguration(MultipartProperties multipartProperties) {
          this.multipartProperties = multipartProperties;
          multipartProperties.setMaxFileSize("-1");
      }
  
      @Bean
      @ConditionalOnMissingBean
      public MultipartConfigElement multipartConfigElement() {
          return this.multipartProperties.createMultipartConfig();
      }
  
      @Bean(name = DispatcherServlet.MULTIPART_RESOLVER_BEAN_NAME)
      @ConditionalOnMissingBean(MultipartResolver.class)
      public StandardServletMultipartResolver multipartResolver() {
          StandardServletMultipartResolver multipartResolver = new StandardServletMultipartResolver();
          multipartResolver.setResolveLazily(this.multipartProperties.isResolveLazily());
          return multipartResolver;
      }
  
  }

以上参考springboot官方文档