On the basis of the browser/server application environment, uploading varied files and convenient management of upload files has become one of the problems of file management applications. The program of file upload without components was designed by using Java I/O flow. The operation of uploading files includes interfaces of submission, process and management of upload files. Upload files are able to be directly stored in the appointed catalog, and upload files can be managed through database. The implement principle of upload files using Java I/O flow and database management method were discussed. And detailed solutions and implement methods were given. 