JAX-RS @FormParam annotation example

In this page you will see an example for @FormParam to bind html form fields to your method inputs. It works for http method POST.

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.

Html form:

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
									"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>User Input Form</title>
</head>
<body>
	<h1>Input User Details</h1>
	<form action="rest/user-form/register" method="post">
		<p>Name : <input type="text" name="name" /></p>
		<p>Address : <input type="text" name="address" /></p>
		<input type="submit" value="Enter Details" />
	</form>
</body>
</html>

User registration service:

package com.java2novice.restful;

import javax.ws.rs.FormParam;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.core.Response;

@Path("/user-form")
public class UserRegService {

	@POST
	@Path("/register")
	public Response registerUserInfo(@FormParam("name") String name,
									@FormParam("address") String address){
		
		String response = "Successfully added user details, name: "+
							name+" and address: "+address;
		return Response.status(200).entity(response).build();
	} 
}

User Input Form

Restful Webservices input form

Output

Restful Webservices response

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Accessing elements are faster with ArrayList, because it is index based. But accessing is difficult with LinkedList. It is slow access. This is to access any element, you need to navigate through the elements one by one. But insertion and deletion is much faster with LinkedList, because if you know the node, just change the pointers before or after nodes. Insertion and deletion is slow with ArrayList, this is because, during these operations ArrayList need to adjust the indexes according to deletion or insetion if you are performing on middle indexes. Means, an ArrayList having 10 elements, if you are inserting at index 5, then you need to shift the indexes above 5 to one more.

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JAX-RS @FormParam annotation example

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