MARC4J provides an easy to use API for working with MARC (binary), MARCXML, MARC JSON in Java. MARC stands for MAchine Readable Cataloging and is a widely used exchange format for bibliographic data. MARCXML provides a loss-less conversion between MARC (MARC21 but also other formats like UNIMARC) and XML.

Features

The MARC4J library includes:

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JSON representation of marc record entity

{
  "leader": "00508cjm a22001813 4500",
 "fields": [
    {
      "001": "10062588"
 },
 {
      "005": "20171013073237.0"
 },
 {
      "007": "sd fsngnnmmneu"
 },
 {
      "008": "170825s2017 xx nn n zxx d"
 },
 {
      "024": {
        "subfields": [
          {
            "a": "00190295755553"
 },
 {
            "2": "gtin-14"
 }
        ],
 "ind1": "7",
 "ind2": " "
 }
    },
 {
      "024": {
        "subfields": [
          {
            "a": "190295755553"
 }
        ],
 "ind1": "1",
 "ind2": " "
 }
    },
 {
      "035": {
        "subfields": [
          {
            "a": "(OCoLC)1002130878"
 }
        ],
 "ind1": " ",
 "ind2": " "
 }
    },
 {
      "035": {
        "subfields": [
          {
            "a": "10062588"
 }
        ],
 "ind1": " ",
 "ind2": " "
 }
    },
 {
      "040": {
        "subfields": [
          {
            "a": "BTCTA"
 },
 {
            "b": "eng"
 },
 {
            "c": "BTCTA"
 }
        ],
 "ind1": " ",
 "ind2": " "
 }
    },
 {
      "100": {
        "subfields": [
          {
            "a": "Rossi, Daniele"
 }
        ],
 "ind1": "1",
 "ind2": " "
 }
    },
 {
      "245": {
        "subfields": [
          {
            "a": "Saint-Saens: Organ Symphony and Carnival of The Animals"
 }
        ],
 "ind1": "0",
 "ind2": "0"
 }
    },
 {
      "260": {
        "subfields": [
          {
            "b": "Wea Corp"
 },
 {
            "c": "2017."
 }
        ],
 "ind1": " ",
 "ind2": " "
 }
    },
 {
      "948": {
        "subfields": [
          {
            "a": "20171013"
 },
 {
            "b": "m"
 },
 {
            "d": "batch"
 },
 {
            "e": "lts"
 },
 {
            "x": "deloclcprefix"
 }
        ],
 "ind1": "2",
 "ind2": " "
 }
    }
  ]
}

Code snippet

to parse MARC file and print all information to console

public class App {

    public static void main(String args[]) throws Exception {

        // path to .mrc file
 String path = "";

 // Input Stream from file
 InputStream in = new FileInputStream(path);
 MarcReader reader = new MarcStreamReader(in);
 while (reader.hasNext()) {
            Record record = reader.next();

 Leader leader = record.getLeader();

 List<ControlField> controlFields = record.getControlFields();
 List<DataField> dataFields = record.getDataFields();

 System.out.println();
 System.out.println("LEADER: " + leader);
 System.out.println("Control fields: ");
 controlFields.forEach(System.out::println);
 System.out.println("Data fields: ");
 dataFields.forEach(System.out::println);
 System.out.println();
 }
    }
}

Transform MARCJson to MARCXML.

...

01741nam a2200373 cb4500001001100000003000700011005001700018008004100035020003000076020003700106020005000143035002400193035002100217035002600238040002000264041000800284245008900292264003700381300003700418336002600455337004600481338002500527490009600552500002500648650007700673650006300750650007800813700007700891700003900968830012301007856012101130900005301251954006301304101073931XDE-60120180416162657.0180111s2018\\\\sz\\\\\\\\\\\\000\0\eng\d\\a331964399193-319-64399-1\\a97833196439919978-3-319-64399-1\\a9783319644004 (electronic)9978-3-319-64400-4\\a(OCoLC)ocn992783736\\a(OCoLC)992783736\\a(DE-599)GBV101073931X\\bgercGBVCPerda0\aeng00aFutures, biometrics and neuroscience researchcLuiz Moutinho, Mladen Sokele, editors31aChambPalgrave Macmillanc[2018]\\axxix, 224 SeitenbIllustrationen\\aTextbtxt2rdacontent\\aohne Hilfsmittel zu benutzenbn2rdamedia\\aBandbnc2rdacarrier0\aInnovative research methodologies in managementv / Luiz Moutinho, Mladen Sokele ; Volume 2\\aEnthält 9 Beiträge\781.1\xaBetriebswirtschaftslehre0(DE-601)0913513910(DE-STW)12041-52stw\781.2\xaManagement0(DE-601)0913761730(DE-STW)12085-62stw\781.3\xaWissenschaftliche Methode0(DE-601)0914014450(DE-STW)16727-02stw1\aMoutinho, LuizeHerausgeberIn4edt0(DE-601)5094509540(DE-588)1314502041\aSokele, MladeneHerausgeberIn4edt\0aInnovative research methodologies in managementb / Luiz Moutinho, Mladen SokelevVolume 292.2018w(DE-601)101138029342yInhaltsverzeichnisuhttp://www.gbv.de/dms/zbw/101073931X.pdfmV:DE-601;B:DE-206qapplication/pdf3Inhaltsverzeichnis\\aGBVbZBW Kiel <206>d!H:! A18-1775xLzLCs206/1\\0ZBW Kiel <206>a26b1740761685c01fH:dA18-1775eux206/1

2. Defining fields using Record 

import org.marc4j.MarcStreamWriter;
import org.marc4j.MarcWriter;
import org.marc4j.marc.MarcFactory;
import org.marc4j.marc.Record;

public class TestMarc4jWriter2 {

  public static void main(String args[]){
    MarcWriter writer = new MarcStreamWriter(System.out, "UTF8");
    MarcFactory factory = MarcFactory.newInstance();

    Record record = factory.newRecord("00714cam a2200205 a 4500");
    record.addVariableField(factory.newControlField("001", "12883376"));
    record.addVariableField(factory.newControlField("005", "20030616111422.0"));
    record.addVariableField(factory.newControlField("008", "020805s2002    nyu    j      000 1 eng  "));
    record.addVariableField(factory.newDataField("020", ' ', ' ', "a", "0786808772"));
    record.addVariableField(factory.newDataField("020", ' ', ' ', "a", "0786816155 (pbk.)"));
    record.addVariableField(factory.newDataField("040", ' ', ' ', "a", "DLC", "c", "DLC", "d", "DLC"));
    record.addVariableField(factory.newDataField("100", '1', ' ', "a", "Chabon, Michael."));
    record.addVariableField(factory.newDataField("245", '1', '0', "a", "Summerland /", "c", "Michael Chabon."));
    record.addVariableField(factory.newDataField("250", ' ', ' ', "a", "1st ed."));
    record.addVariableField(factory.newDataField("260", ' ', ' ', "a", "New York :", "b", "Miramax Books/Hyperion Books for Children,", "c", "c2002."));
    record.addVariableField(factory.newDataField("300", ' ', ' ', "a", "500 p. ;", "c", "22 cm."));
    record.addVariableField(factory.newDataField("520", ' ', ' ', "a", "Ethan Feld, the worst baseball player in the history of the game, finds himself recruited by a 100-year-old scout to help a band of fairies triumph over an ancient enemy."));
    record.addVariableField(factory.newDataField("650", ' ', '1', "a", "Fantasy."));
    record.addVariableField(factory.newDataField("650", ' ', '1', "a", "Baseball", "v", "Fiction."));
    record.addVariableField(factory.newDataField("650", ' ', '1', "a", "Magic", "v", "Fiction."));

    writer.write(record);
    writer.close();
  }
}

00714cam a2200205 a 45000010009000000050017000090080041000260200015000670200022000820400018001041000021001222450034001432500012001772600067001893000021002565200175002776500013004526500023004656500020004881288337620030616111422.0020805s2002    nyu    j      000 1 eng    a0786808772  a0786816155 (pbk.)  aDLCcDLCdDLC1 aChabon, Michael.10aSummerland /cMichael Chabon.  a1st ed.  aNew York :bMiramax Books/Hyperion Books for Children,cc2002.  a500 p. ;c22 cm.  aEthan Feld, the worst baseball player in the history of the game, finds himself recruited by a 100-year-old scout to help a band of fairies triumph over an ancient enemy. 1aFantasy. 1aBaseballvFiction. 1aMagicvFiction.

Validating a MARC file locally

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