首先，没有enabled财产在org.springframework.boot.autoconfigure.web.MultipartProperties class.
Refer https://github.com/spring-projects/spring-boot/blob/master/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/MultipartProperties.java https://github.com/spring-projects/spring-boot/blob/master/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/MultipartProperties.java
如果您使用 Servlet 3 容器，则无需使用 commons-fileupload 机制，默认情况下会启用 Multipart 支持。如果您不想自定义任何多部分默认配置，则无需添加任何配置application.properties以及。
<form method="post" action="upload" enctype="multipart/form-data">
File: <input type="file" name="file"/>
<input type="submit" value="Submit"/>
</form>
@RequestMapping(value="/upload", method=RequestMethod.POST)
public String upload(@RequestPart("file") MultipartFile multipartFile)
{
System.out.println(multipartFile.getOriginalFilename());
return "redirect:/";
}
如果您想使用 commons-fileupload 那么添加以下配置就可以正常工作：
package demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.embedded.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;
import org.springframework.web.multipart.support.MultipartFilter;
@SpringBootApplication
public class BootDemoApplication {
public static void main(String[] args) {
SpringApplication.run(BootDemoApplication.class, args);
}
@Bean
public CommonsMultipartResolver commonsMultipartResolver() {
final CommonsMultipartResolver commonsMultipartResolver = new CommonsMultipartResolver();
commonsMultipartResolver.setMaxUploadSize(-1);
return commonsMultipartResolver;
}
@Bean
public FilterRegistrationBean multipartFilterRegistrationBean() {
final MultipartFilter multipartFilter = new MultipartFilter();
final FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(multipartFilter);
filterRegistrationBean.addInitParameter("multipartResolverBeanName", "commonsMultipartResolver");
return filterRegistrationBean;
}
}
当然，我们需要添加 commons-fileupload 依赖项。
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
