@PathParam
The @PathParam annotation binds the value of a path segment to a resource method parameter. For example, the following method would intercept an HTTP GET like http://server:port/login/12345 and convert the PathParam "12345" into the String "id"
@Path("/")
public class LoginService
{
@GET
@Path("login/{zip}")
public String login(@PathParam("zip") String id) {
return "Id is " +id;
}
}
As for @FormParam, you can embed the @PathParam declaration at class level, if you prefer.
@QueryParam
The @QueryParam annotation binds the value of a path segment to a resource method parameter. For example, the following method would intercept an HTTP GET like http://server:port/login?zip=12345 and inject the query parameter "zip" into the method parameter "zip"
@Path("/")
public class LoginService
{
@GET
@Path("login/{zip}")
public String login(@QueryParam("zip") String zip) {
return "Id is " +id;
}
}
QueryParam can be convenientely used with the DefaultValue annotation so that you can avoid a null pointer exception if no query parameter is passed.
@GET
@Path("login/{zip}")
public String login(@DefaultValue("11111") @QueryParam("zip") String zip) {
return "Id is " +id;
}
As for @FormParam, you can embed the @PathParam declaration at class level, if you prefer.
@HeaderParam
The @HeaderParam annotation extracts information from the HTTP header and binds it to a method parameter. Example:
@GET
public String callService(@HeaderParam("User-Agent") String whichBrowser) {
...
}
@CookieParam
The @CookieParam annotation reads an information stored as a cookie and binds it to a method parameter. Example:
@GET
public String callService(@CookieParam("sessionid") String sessionid) {
...
}
@MatrixParam
The @MatrixParam annotation can be used to bind an expression containing several property=value to a method parameter. For example, supposing you were to invoke an URL like http://server:port/login;name=francesco;surname=marchioni
@GET
public String callService(@MatrixParam("name") String name,
@MatrixParam("surname") String surname) {
...
}
Reference :- http://www.mastertheboss.com/jboss-frameworks/resteasy/resteasy-tutorial-part-two-web-parameters
