How to define the default value for @QueryParam?

Question

When I add the default value of the string in JAX-RS, it doesn't take the value. It stays to null or empty.

@QueryParam("status")
private String status = "confirmed";

When I pass the status as empty or null or undefined it stays as empty or null or undefined. It doesn't take the default as confirmed.

Answer 1

Use the @DefaultValue annotation to specify the default value of the request meta-data that is bound to @PathParam , @QueryParam , @MatrixParam , @CookieParam , @FormParam and @HeaderParam annotations:

@QueryParam("status")
@DefaultValue("confirmed")
private String status;

If a method parameter, resource class field, or resource class bean property is not annotated with @DefaultValue and the corresponding meta-data is not present in the request, the value will be:

• An empty collection for List , Set or SortedSet .
• null for other object types;
• Java-defined default for primitive types.