// Default constructor
    }

    /** Logger instance for this class. */
    private static final Logger logger = LogManager.getLogger(CrawlerStatsHelper.class);

    /** Key used to store the begin timestamp in statistics objects. */
    private static final String BEGIN_KEY = "begin";

    /** Logger instance specifically for outputting crawler statistics. */
    protected Logger statsLogger = null;

# | DOUBLE        | java.math.BigDecimal | decimal?      |
# | DATE          | java.util.Date       | DateTime?     |
# | TIME          | java.sql.Time        | DateTime?     |
# | TIMESTAMP     | java.sql.Timestamp   | DateTime?     |
# | BIT           | java.lang.Boolean    | bool?         |
# | BOOLEAN       | java.lang.Boolean    | bool?         |
# | BINARY        | byte[]               | byte[]        |

            "content": doc.get("content", ""),
            "mimetype": doc.get("mimetype", "text/html"),
            "filetype": doc.get("filetype", "html"),
            "created": doc.get("@timestamp", ""),
            "timestamp": doc.get("@timestamp", ""),
            # Add custom fields as needed
        }

        outfile.write(json.dumps(fess_doc) + '\n')
```

**Step 3: Import to Fess**

Option A: Via Admin UI

    /**
     * Field name for URL.
     */
    protected static final String URL = "url";

    /**
     * Field name for last modified timestamp.
     */
    protected static final String LAST_MODIFIED = "lastModified";

    /**
     * Field name for creation time timestamp.
     */
    protected static final String CREATE_TIME = "createTime";

    /**
     * Document type.
     */

    @Required
    @Size(max = 1000)
    public String id;

    /** Username of the user who last updated this entry */
    @Size(max = 1000)
    public String updatedBy;

    /** Timestamp when this entry was last updated */
    @ValidateTypeFailure
    public Long updatedTime;

    /** Version number for optimistic locking */
    @Required
    @ValidateTypeFailure
    public Integer versionNo;

            ggg_ = ggg;
        }

        /**
         * @return Timestamp
         */
        public Timestamp getHhh() {
            return hhh_;
        }

        /**
         * @param hhh
         */
        public void setHhh(final Timestamp hhh) {
            hhh_ = hhh;
        }

        /**
         * @param iii
         */

                }
                if (o2 == null) {
                    return 1;
                }

                final Object timeObj1 = o1.get(FieldNames.TIMESTAMP);
                final Object timeObj2 = o2.get(FieldNames.TIMESTAMP);
                if (timeObj1 == null && timeObj2 == null) {
                    return 0;
                }
                if (timeObj1 == null) {
                    return -1;

    public static final String AS_SITESEARCH = "sitesearch";

    /** The parameter for occurrence. */
    public static final String AS_OCCURRENCE = "occt";

    /** The parameter for timestamp. */
    public static final String AS_TIMESTAMP = "timestamp";

    /**
     * Returns the query.
     *
     * @return The query.
     */
    public abstract String getQuery();

    /**
     * Returns the fields.
     *

public class AvPair {

    /**
     * EOL type
     */
    public static final int MsvAvEOL = 0x0;

    /**
     * Flags type
     */
    public static final int MsvAvFlags = 0x6;

    /**
     * Timestamp type
     */
    public static final int MsvAvTimestamp = 0x7;

    /**
     * Single host type
     */
    public static final int MsvAvSingleHost = 0x08;

    /**
     * Target name type
     */

    @ValidateTypeFailure
    public Integer sortOrder;

    /** The username of who created this duplicate host entry */
    @Size(max = 1000)
    public String createdBy;

    /** The timestamp when this duplicate host entry was created */
    @ValidateTypeFailure
    public Long createdTime;

    /**
     * Initializes the form with default values for creating a new duplicate host entry.
     */