Read array in YAML with Jackson library

In the blog [Read simple YAML file with JAVA], we have seen how to parse a simple YAML file with the help of Jackson library. Let’s see how to read an array in the YAML file in this topic.

YAML file

empOne:
 - John Doe
 - 30

Class to map the yml file

package readyamlfile.readyamlfile;

public class EmpList {
	private String[] empOne;

	public String[] getEmpOne() {
		return empOne;
	}

	public void setEmpOne(String[] empOne) {
		this.empOne = empOne;
	}
}

Jackson’s library to read yaml file to EmpList bean

package readyamlfile.readyamlfile;

import java.io.File;

import org.apache.commons.lang3.builder.ReflectionToStringBuilder;
import org.apache.commons.lang3.builder.ToStringStyle;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;

public class ReadEmpList {

	public static void main(String[] args) {
		// TODO Auto-generated method stub		
		
		ObjectMapper mapper = new ObjectMapper(new YAMLFactory());

		try {
			File file = new File("C:\\yml\\emplist.yml");
		
			EmpList emplist = mapper.readValue(file, EmpList.class);
						System.out.println(ReflectionToStringBuilder.toString(emplist,ToStringStyle.MULTI_LINE_STYLE));
			
			for (int i=0; i<emplist.getEmpOne().length;i++){
				System.out.println(emplist.getEmpOne()[i]);				
			}
		} catch (Exception e) {

		}
	}
}

The above class has different ways to print the out put of yaml file to the console

Run the above class

readyamlfile.readyamlfile.EmpList@59e84876[
empOne={John Doe,30}
]
John Doe
30

In the next blog, we will see how to read dictionaries with the help of Jackson library

Tags: yaml