SpringMVC的CommonsMultipartFile转成File

通过org.apache.commons.fileupload.disk.DiskFileItem进行相应的转换

1. 先导入：

    <!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload -->
    <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>1.4</version>
    </dependency>

DiskFileItem fileItem= (DiskFileItem) commonsMultipartFile.getFileItem();
File res = fileItem.getStoreLocation();

至此