Institute of Information Science - University of Miskolc

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==== Lépések ====

1. Hozzunk létre egy dinamikus web projektet RestExample néven

2. WEBCONTENT/web.xml tartalma legyen a következő:

   <?xml version="1.0" encoding="UTF-8"?>
   <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
     <display-name>RestExample</display-name>
       <servlet-mapping>
           <servlet-name>javax.ws.rs.core.Application</servlet-name>
           <url-pattern>/*</url-pattern>
       </servlet-mapping>
   </web-app>

Ebben azt állítjuk be, hogy a beépített szervlet: javax.ws.rs.core.Application minden http kérést kapjon el.

3. Hozzuk létre a Book osztályt:

  package com.unimiskolc;
  
  import javax.xml.bind.annotation.XmlAccessType;
  import javax.xml.bind.annotation.XmlAccessorType;
  import javax.xml.bind.annotation.XmlAttribute;
  import javax.xml.bind.annotation.XmlID;
  import javax.xml.bind.annotation.XmlRootElement;
  
  
  @XmlRootElement
  @XmlAccessorType(XmlAccessType.NONE)
  public class Book {
      @XmlID
      private String id;
      
      @XmlAttribute
      private String title;
  
      @XmlAttribute
      private String author; 
      
      public Book()  {
      	
      }
      
  	public Book(String id, String title, String author) {
  		this.id = id;
  		this.title = title;
  		this.author = author;
  	}
  
      public String getId() {
  		return id;
  	}
  
  	public void setId(String id) {
  		this.id = id;
  	}
  }


4. Hozzuk létre a BookStore osztályt:

  package com.unimiskolc;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.List;
  
  import javax.ws.rs.Consumes;
  import javax.ws.rs.DELETE;
  import javax.ws.rs.GET;
  import javax.ws.rs.POST;
  import javax.ws.rs.PUT;
  import javax.ws.rs.Path;
  import javax.ws.rs.PathParam;
  import javax.ws.rs.Produces;
  
  @Path("/")
  @Consumes({ "application/xml", "application/json" })
  @Produces({ "application/xml", "application/json" })
  public class BookStore {
  	List<Book> books;
  	
  	public BookStore() {
  		books = new ArrayList<Book>();
  		books.add(new Book("1", "Gárdonyi Géza", "Egri Csillagok"));
  		books.add(new Book("2", "Kiss Elek", "Az én könyvem"));		
  	}
  	
  	@GET
  	@Path("books")
  	public Collection<Book> getBooks(){
  		return books;
  		
  	}
  	@POST
  	@Path("books")
  	public void addBook(Book book){
  		books.add(book);
  	}
  
  	@GET
  	@Path("book/{id}")
  	public Book getBook(@PathParam("id") String id){
  		for (Book book : books) {
  			if(book.getId().equalsIgnoreCase(id)) {
  				return book;
  			}
  		}
  		return null;
  	}
  
  	@PUT
  	@Path("book/{id}")
  	public void updateBook(@PathParam("id") String id, Book book){
  		
  	}
  
  	@DELETE
  	@Path("book/{id}")
  	public void deleteBook(@PathParam("id") String id){
  		
  	}
  
  }

4. deploy után a http://localhost:8080/RestExample/book/2 címen a kettessel jelölt könyvet kapjuk vissza.

5. http://localhost:8080/RestExample/books url az összes könyvet visszadja