够的，就是想偷懒，所以想看看，有没有现成的，看到有上传文件的

public static void write(File f, Object obj) {
        if(null != f && null != obj) {
            if(f.isDirectory()) {
                throw Lang.makeThrow("Directory '%s' can not be write as File", new Object[]{f});
            } else {
                try {
                    if(!f.exists()) {
                        createNewFile(f);
                    }

                    if(obj instanceof InputStream) {
                        Streams.writeAndClose(Streams.fileOut(f), (InputStream)obj);
                    } else if(obj instanceof byte[]) {
                        Streams.writeAndClose(Streams.fileOut(f), (byte[])((byte[])obj));
                    } else if(obj instanceof Reader) {
                        Streams.writeAndClose(Streams.fileOutw(f), (Reader)obj);
                    } else {
                        Streams.writeAndClose(Streams.fileOutw(f), obj.toString());
                    }

                } catch (IOException var3) {
                    throw Lang.wrapThrow(var3);
                }
            }
        }
    }