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How to convert a JSON object to an enum using Jackson in Java?
A JSONObject can parse the text from String to produce a Map kind of an object. An Enum can be used to define a collection of constants, when we need a predefined list of values which do not represent some kind of numeric or textual data then we can use an enum. We can convert a JSON object to an enum using the readValue() method of ObjectMapper class.
In the below example, we can convert/deserialize a JSON object to Java enum using the Jackson library.
Example
import com.fasterxml.jackson.databind.*;
public class JSONToEnumTest {
public static void main(String arg[]) throws Exception {
ObjectMapper mapper = new ObjectMapper();
Employee emp = mapper.readValue("{\"jobType\":\"CONTRACT\"}", Employee.class);
System.out.println(emp.getJobType());
}
public static class Employee {
private JobType jobType;
public JobType getJobType() {
return jobType;
}
public void setJobType(JobType jobType) {
this.jobType = jobType;
}
}
public enum JobType {
PERMANENT,
CONTRACT,
}
}Output
CONTRACT
Updated on: 07-Jul-2020
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