JAX-RS @Path Regex based URI matching Example

Restful Web service

Representational State Transfer

REST is an architectural style which is based on web-standards and the HTTP protocol.

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HTTP Methods

The PUT, GET, POST and DELETE methods are typical used in REST based architectures.

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Java Restful Implementations

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JAX-RS @Path Regex based URI

In complex form, we can use regular expression based parameter matching.

e.g. @Path("/{param: [0-9]+}")

In this case the web service method will accept only the number parameter, see the below example

Example

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
 
@Path("/statepatternparam")
public class PathPatternExample {
   @GET
    @Produces("application/xml")
    @Path("/{param: [0-9]+}")
    public String getMsg(@PathParam("param") String state) {
 
        String stateDetails = null;
 
        if (state.equals("13")) {
 
            stateDetails = "<State><name>KERALA</name><shortname>KL</shortname>"
                    +
 
                    "<headq>TRIVANDRUM</headq><language>MALAYALAM</language></State>";
 
        } else {
 
            stateDetails = "Data not found";
 
        }
 
        return stateDetails;
 
    }
}