TOML for Java
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TOML for Java

This is a parser for Tom Preson-Werner's (@mojombo) TOML markup language, using Java.

Build Status

Get it

jtoml is published in the sonatype nexus repository. In order to use it, you may add this repository in your pom.xml:

    <!-- If you want snapshots versions -->

Add the jtoml dependency:


Note: As of 2014-10-31 The current version is not on sonatype, in the meantime you can build the library yourself and install it in your local repository in order to use the latest fixes and enhancements with mvn install and using version 1.1.0 in your project.



Toml toml = Toml.parse("pi = 3.14\nfoo = \"bar\""); // parse a String
toml = Toml.parse(new File("foo.toml")); // or a file

Getting values

The Toml class support different types of getters so that you can retrieve a specific type or the underlying Object without casting.

// get different types
toml.get("foo"); // Object
toml.getString("foo"); // String
toml.getBoolean("foo"); // Boolean
toml.getDate("foo"); // Calendar
toml.getDouble("foo"); // Double
toml.getLong("foo"); // Long
toml.getList("foo"); // List<Object>
toml.getMap("foo"); // Map<String, Object>

Mapping custom types

You can map a custom type from an entire TOML String or part of it. Let's say you would like to map the following TOML to a Player entity.

nickName = "foo"
score = 42

You could do it as simple as following:

// or Custom objects
public class Player {
    String name;
    Long score;
Toml toml = Toml.parse("[player]\nname = \"foo\"\nscore = 42");
Player player = toml.getAs("player", Player.class);; // "foo"
player.score; // 42L

Note: Supported types are Long, String, Double, Boolean, Calendar, List, Map or Objects having the pre-cited types only.


JToml supports also serialization. Indeed, you can serialize a custom type to a String having the TOML format representing the original object. Imagine the following custom Objects:

public class Stats {
    Long maxSpeed;
    Double weight;
    // Constructors

public class Car {
    String brand;
    String model;
    Stats stats;
    Boolean legendary;
    Calendar date;
    List<String> options;
    // Constructors

Car f12Berlinetta = new Car("Ferrari", "F12 Berlinetta", true, "2012-02-29",
    360, 1525.5, Arrays.asList("GPS", "Leather", "Nitro")
String toml = Toml.serialize("f12b", f12Berlinetta);

The call to Toml.serialize() will produce the following TOML format:

brand = "Ferrari"
model = "F12 Berlinetta"
legendary = true
date = 2012-02-29T00:00:00Z
options = ["GPS", "Leather", "Nitro"]

maxSpeed = 347
weight = 1525.5

You can also serialize the current instance of a Toml object:

Toml toml = Toml.parse("[player]\nname = \"foo\"\nscore = 42");

Will produce the following TOML String

name = "foo"
score = 42

Note: Like for custom types above, supported types are Long, String, Double, Boolean, Calendar, List, Map or Objects having the pre-cited types only.


Should normally support everything in the Toml Spec.


MIT License (MIT).

See the LICENSE file.