REST java JAX-RS Jersey项目源码

package de.vogella.jersey.todo.resources; import java.io.IOException; import java.net.URI; import java.util.ArrayList; import java.util.List; import javax.servlet.http.HttpServletResponse; import javax.ws.rs.Consumes; import javax.ws.rs.FormParam; 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 javax.ws.rs.core.Context; import javax.ws.rs.core.MediaType; import javax.ws.rs.core.Request; import javax.ws.rs.core.Response; import javax.ws.rs.core.UriInfo; import de.vogella.jersey.todo.dao.TodoDao; import de.vogella.jersey.todo.model.Todo; //Will map the resource to the URL todos @Path("/todos") public class TodosResource { // Allows to insert contextual objects into the class, // e.g. ServletContext, Request, Response, UriInfo @Context UriInfo uriInfo; @Context Request request; // Return the list of todos to the user in the browser @GET @Produces(MediaType.TEXT_XML) public List<Todo> getTodosBrowser() { List<Todo> todos = new ArrayList<Todo>(); todos.addAll( TodoDao.instance.getModel().values() ); return todos; } // Return the list of todos for applications @GET @Produces({MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON}) public List<Todo> getTodos() { List<Todo> todos = new ArrayList<Todo>(); todos.addAll( TodoDao.instance.getModel().values() ); return todos; } // retuns the number of todos // Use http://localhost:8080/de.vogella.jersey.todo/rest/todos/count // to get the total number of records @GET @Path("count") @Produces(MediaType.TEXT_PLAIN) public String getCount() { int count = TodoDao.instance.getModel().size(); return String.valueOf(count); } @POST @Produces(MediaType.TEXT_HTML) @Consumes(MediaType.APPLICATION_FORM_URLENCODED) public void newTodo( @FormParam("id") String id, @FormParam("summary") String summary, @FormParam("description") String description, @Context HttpServletResponse servletResponse ) throws IOException { Todo todo = new Todo(id,summary); if (description!=null){ todo.setDescription(description); } TodoDao.instance.getModel().put(id, todo); URI uri = uriInfo.getAbsolutePathBuilder().path(id).build(); Response.created(uri).build(); servletResponse.sendRedirect("../create_todo.html"); } // Defines that the next path parameter after todos is // treated as a parameter and passed to the TodoResources // Allows to type http://localhost:8080/de.vogella.jersey.todo/rest/todos/1 // 1 will be treaded as parameter todo and passed to TodoResource @Path("{todo}") public TodoResource getTodo( @PathParam("todo") String id) { return new TodoResource(uriInfo, request, id); } }