java.lang.IllegalArgumentException: class com.gec.bean.Job declares multiple JSON fields named id

This error occurs when a class is annotated with @JsonAutoDetect and declares multiple fields with the same property name. For example, the class com.gec.bean.Job might look like this:

public class Job {
private int id;
private String name;
private int jobId;

// getters and setters
}

In this case, the id field is already being serialized by default because it follows the JavaBean naming convention for a property called "id". However, the jobId field is also being serialized with the property name "id", which causes a conflict.

To resolve this issue, you can either change the property name of one of the fields or use annotations such as @JsonProperty to specify a different name for one of the fields. For example:

public class Job {
private int id;
private String name;

@JsonProperty("jobId")
private int jobId;

// getters and setters
}

With this change, the jobId field will be serialized with the property name "jobId" instead of "id", avoiding the conflict.