jcifs-ng will be a proper choice for many users. 
There are a lot of SMB devices in the world.
Some of them only work with the old jcifs library.
If you want to support many SMB devices, CodeLibs jcifs library will be helpful.
For example, since [Fess](https://github.com/codelibs/fess) needs to support many SMB devices, it uses this library.

 * more ACEs are evaluated until all desired access bits (combined)
 * are "allowed". If all of the desired access bits are not "allowed"
 * the then same process is repeated for inherited ACEs.
 * <p>
 * For example, if user <tt>WNET\alice</tt> tries to open a file
 * with desired access bits <tt>0x00000003</tt> (<tt>FILE_READ_DATA |
 * FILE_WRITE_DATA</tt>) and the target file has the following security
 * descriptor ACEs:
 * 
 * <pre>

        }
        /*
         * The link entries contain maps of referrals by path representing DFS links.
         * Note that paths are relative to the root like "\" and not "\example.com\root".
         */
        CacheEntry<DfsReferralDataInternal> links = roots.get(root);
        if ( links != null && now > links.expiration ) {
            if ( log.isDebugEnabled() ) {

                                 * actually shutdown the connection before other threads
                                 * have committed themselves (e.g. InterruptTest example).
                                 */
                                try { transport.disconnect(true); } catch (Exception e) {}
                            }
    

                this.sub_authority[ i ] = (int) ( Long.parseLong(st.nextToken()) & 0xFFFFFFFFL );
        }
    }


    /**
     * Construct a SID from a domain SID and an RID
     * (relative identifier). For example, a domain SID
     * <tt>S-1-5-21-1496946806-2192648263-3843101252</tt> and RID <tt>1029</tt> would
     * yield the SID <tt>S-1-5-21-1496946806-2192648263-3843101252-1029</tt>.
     * 
     * @param domsid

                root = root.toLowerCase();

                /* The link entries contain maps of referrals by path representing DFS links.
                 * Note that paths are relative to the root like "\" and not "\example.com\root".
                 */
                CacheEntry links = (CacheEntry)roots.get(root);
                if (links != null && now > links.expiration) {
                    roots.remove(root);

        }
        dr.domain = n.getDomain();
        return dr;
    }


    /*
     * Split DFS path like \fs1.example.com\root5\link2\foo\bar.txt into at
     * most 3 components (not including the first index which is always empty):
     * result[0] = ""
     * result[1] = "fs1.example.com"
     * result[2] = "root5"
     * result[3] = "link2\foo\bar.txt"
     */

 * <code>smb1://domain;username:password@server/share/path/to/file.txt</code></td><td>
 * A prototypical example that uses all the fields.
 * </td></tr>
 * 
 * <tr><td width="20%"><code>smb1://myworkgroup/angus/ &lt;-- ILLEGAL </code></td><td>
 * Despite the hierarchial relationship between workgroups, servers, and
 * filesystems this example is not valid.
 * </td></tr>
 *
 * <tr><td width="20%">

 * more ACEs are evaluated until all desired access bits (combined)
 * are "allowed". If all of the desired access bits are not "allowed"
 * the then same process is repeated for inherited ACEs.
 * <p>
 * For example, if user <tt>WNET\alice</tt> tries to open a file
 * with desired access bits <tt>0x00000003</tt> (<tt>FILE_READ_DATA |
 * FILE_WRITE_DATA</tt>) and the target file has the following security
 * descriptor ACEs:
 * <pre>

/**
 * Creates an {@link java.io.InputStream} for reading bytes from a file on
 * an SMB server addressed by the <code>url</code> parameter. See {@link
 * jcifs.smb1.smb1.SmbFile} for a detailed description and examples of the smb
 * URL syntax.
 *
 * @param url An smb URL string representing the file to read from
 */

    public SmbFileInputStream( String url ) throws SmbException, MalformedURLException, UnknownHostException {