Read and map property file without Spring

I have a property.yaml file:

table:
  map:
    0:
      - 1
      - 2
      - 3
    1:
      - 1
      - 2
      - 3
      - 4
    2:
      - 1
      - 2
      - 3
    3:
      - 1
      - 2
      - 3

I want to map it to Map<Integer, List<Integer>> map. It's easy task with @ConfigurationProperties("table"). But I have to do it without Spring. Any idea?

Spring uses snakeyaml so it is already on your classpath, you can use it out of the box. The project page is here if you need more info.

In your case you can do something like this:

Yaml yaml = new Yaml(new Constructor(Yourclass));
Yourclass yc = (Yourclass) yaml.load(yourfile);
Map<Integer, List<Integer>> map = yc.map;

Thanks @Adam Arold for help. Solution:

FileProperties.class

@Getter
@Setter
public class FileProperties {
    private Map<String, List<String>> table;
}

MyClass

public class MyClass {
    public FileProperties readYaml(String filename) {
        Yaml yaml = new Yaml();
        InputStream inputStream = this.getClass()
                .getClassLoader()
                .getResourceAsStream(filename);
        return yaml.load(inputStream);
    }

yaml

!!com.test.test.FileProperties
table:
  key1:
    - value1
    - value12
    - value13
  key2:
    - value11
    - value12
    - value15
  key3:
    - value11
    - value12
    - value15

Note the !!com.test.test.FileProperties holds the info about the class to be used when loading it.