JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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JAX-RS @PathParam annotation example


This page gives you an example using JAX-RS @PathParam annotation, which injects value from URI to your method input parameters.

In the previous examples we have given details of application setup, dependencies, web.xml file configurations: If you want to know about these configuration, please refer these:

Restful web services using RESTEasy hello world example.
Restful web services using Jersey hello world example.

Look at the below class to apply @PathParam annotation:

package com.java2novice.restful;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.core.Response;

@Path("/employee")
public class EmployeeService {

	@GET
	@Path("{empId}")
	public Response getEmployeeById(@PathParam("empId") String empId){
		
		return Response.status(200).entity("Got employee with id : " + empId).build();
	}
	
	@GET
	@Path("{branch}/{department}")
	public Response getEmployeeList(@PathParam("branch") String branchName,
									@PathParam("department") String deptName){
		
		String resp = "Total number of employees in the "+deptName+" department from "
						+branchName+" is 100";
		return Response.status(200).entity(resp).build();
	}
}

In the above example, if you use "/employee/123" URI pattern, getEmployeeById() method will be invoked, and you will get "Got employee with id : 123" as a response.

Using @PathParam, you can access multiple values as well. Look at getEmployeeList() method in the above example, if you use "/employee/bangalore/accounts" URI pattern, then getEmployeeByName() method will be invoked and you will get "Total number of employees in the accounts department from bangalore is 100" as a response.

In the next page you will see an example on how to use @QueryParam annotation.

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Restful Web Services Examples

  1. Restful web services using RESTEasy hello world example.
  2. Restful web services using Jersey hello world example.
  3. JAX-RS @Path annotation example
  4. JAX-RS @Path annotation with regular expression match example
  5. JAX-RS @PathParam annotation example
  6. JAX-RS @QueryParam and @DefaultValue annotations example
  7. JAX-RS @MatrixParam annotation example
  8. How to read multiple values of a query paramter in JAX-RS restful web services?
  9. How to pass header parameters as method inputs in JAX-RS restful web services?
  10. How to read header parameters in JAX-RS restful web services?
  11. JAX-RS @FormParam annotation example
  12. How to upload file using Jersey restful web services?
  13. How to download file using java restful web services?
  14. XML based Restful web service with RESTEasy and JAXB.
  15. XML based Restful web service with Jersey and JAXB.
  16. Json based Restful web service with RESTEasy, Jettison and JAXB
  17. Json based Restful web service with RESTEasy and Jackson
  18. Json based Restful web service with Jersey and Jackson
  19. How to input json request with Jersey and Jackson?
  20. Java client for restful web service using java.net package
  21. Java client for restful web service using Jersey API
  22. Java restful webservices with HTTP basic authentication.
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Everything in java is an object, except primitives. Primitives are int, short, long, boolean, etc. Since they are not objects, they cannot return as objects, and collection of objects. To support this, java provides wrapper classes to move primitives to objects. Some of the wrapper classes are Integer, Long, Boolean, etc.
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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
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