[snakeyaml] How to generate YAML via Java?

Problem
How to generate YAML via Java?
The expected YAML content looks like:

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intents: - greet - inform - others - question entities: - userid - is_account_locked - pass_company_check

How-To
Add snakeyaml dependency to pom.xml

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<dependency> <groupId>org.yaml</groupId> <artifactId>snakeyaml</artifactId> <version>1.19</version> </dependency>

Here has sample code which implement via snakeyaml

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package test.albert.snakeyaml; import java.util.Arrays; import java.util.HashMap; import java.util.List; import java.util.Map; import org.yaml.snakeyaml.DumperOptions; import org.yaml.snakeyaml.Yaml; import lombok.AllArgsConstructor; import lombok.Data; import lombok.extern.slf4j.Slf4j; @Slf4j public class SnakeYamlTest { public static void main(String[] args) { // Set DumperOptions options DumperOptions options = new DumperOptions(); options.setDefaultFlowStyle(DumperOptions.FlowStyle.BLOCK); options.setPrettyFlow(true); // Create Yaml instance with DumperOptions Yaml yaml = new Yaml(options); // Prepare map data for YAML Map<String, Object> map = new HashMap<>(); map.put("intents", Arrays.asList("greet", "inform", "others", "question")); map.put("entities", Arrays.asList("userid", "is_account_locked", "pass_company_check")); // Serialize a Java object into a YAML String String output = yaml.dump(map); log.info("\n" + output); } }