Unable to produce JSON response for an arraylist contaning java beans

[rakesh kadulkar]

Hi,

I am new to web services so trying out the tutorials over the net.
I am using JAX-RS tutorials for myeclipse.
I have created a demo application which successfully produces XML response for a list of entities but the same application if configured to produce JSON response for list of entities it is giving below error.

"A message body writer for Java type, class java.util.ArrayList, and MIME media type, application/json, was not found"

My entity and the web service is as below.

WEB Service

package com.example;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;

import javax.ws.rs.Consumes;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;

import com.sun.jersey.spi.resource.Singleton;

@Produces("application/json")
@Path("custservice")
@Singleton
public class CustomerService {

	List<Customer> list = new ArrayList<Customer>();
	
	public CustomerService()
	{
		Customer cust = new Customer();
		cust.setName("Rakesh");
		addCustomer(cust);
	}
	
	@GET
	@Produces("application/json")
	public List getAllCustomers() {
		return list;
	}

	@GET
	@Path("{id}")
	@Produces("application/json")
	public Customer getCustomer(@PathParam("id") int id) {
		return list.get(id);
	}

	@POST
	@Path("add")
	@Produces("text/plain")
	@Consumes("application/json")
	public String addCustomer(Customer customer) {
		int id = list.size();
		customer.setId(id);
		list.add(customer);
		return "Customer :: " + customer.getName() + " added successfully with the id :: " + customer.getId();
	}
	
	
}

Entity
------

[code=java]
package com.example;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class Customer {

	private int id;
	private String name;
	
	public Customer()
	{
		
	}
	
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	
}

Your help in this regards is appreciated.

Best Regards,
Rakesh Kadulkar

[H Paul]

Should line 34 be?

public List<Customer> getAllCustomers() 

[rakesh kadulkar]

Great that's solved my problem.
Thank you.

- Rakesh