@javax. ws.rs WebService Annotation

For WebService. 1. Path

@javax. Ws.rs.Path The URI path that identifies the resource class or resource method to be requested.
Example, @Path ("animal") that represents the transaction to be processed when the next level path is animal.
@Path ("{species}") This notation with curly braces means that the next path is parameterized, with @pathparam ("species") using parameters that can be assigned to a function.

For code:

@Path ("Animal") public
class Animal {public
	String species,name;
	public int age;
	public static Animal animal=new Animal ();
	
	@GET
	@Path ("{species}")
	@Produces (mediatype.application_json) public
	Animal Wsanimal (@PathParam (" Species ") string species,
			@QueryParam (" name ") string name,
			@QueryParam (' age ') int age
			) {
		animal.species=species;
		Animal.name=name;
		animal.age=  age==0?2:age;
		return animal
	}
}

The effect is shown in Figure 1-1:

Figure 1-1 @Path Usage Example

2. From message data to method parameters

@javax. Ws.rs.PathParam binds the path parameter specified in the URI to the resource method parameter, the field of the resource class, or the Bean property of the resource class.

@javax. ws.rs. Queryparam

Assign the query parameter of the HTTP request to the parameter of the function.

@javax. Ws.rs.DefaultValue

Sets the default value for the @queryparam parameter. If @queryparam does not receive a value, the default value is used. Like what:

public string Fun (@DefaultValue ("description") @QueryParam ("desc") string desc) {...}

@javax. ws.rs. Formparam

Assign the parameters in the form form of the HTTP request to the parameters of the function.

@avax. Ws.rs.Context

Used to get environment information. An example of obtaining a client IP is shown below:

@Path ("util") public
class Util {
	
	@Path ("Getclientip")
	@GET
	@Produces (mediatype.text_plain)
	Public String Getclientip (@Context httpservletrequest request) {return
		request.getremoteaddr ();
	}
}

3.http Method

@javax. Ws.rs.GET
Indicates that this method responds to an HTTP GET request.

@javax. Ws.rs.POST
Indicates that this method responds to an HTTP POST request.

@javax. Ws.rs.PUT

Typically used to update data.

@javax. Ws.rs.DELETE

Typically used to delete data. 4. Return Data type

@javax. ws.rs.Produces
Set up HTTP return message, Report style content type.
The value is Javax.ws.rs.core.MediaType.XXX. Commonly used are:

Mediatype.application_json
Mediatype.text_plain