其他Web服務獲取對象作爲響應

我寫了一個簡單的應用程序，使用Apache CXF創建了一個服務器和一個客戶端。我希望當客戶端請求某個消息時，服務器將返回此消息。其他Web服務獲取對象作爲響應

我的代碼

public class Message { 
    private long id; 
    private String message; 
    private String author; 

    public Message() { } 

    public Message(long id, String message, String author) { 
     this.id = id; 
     this.message = message; 
     this.author = author; 
    } 

    public long getId() { 
     return id; 
    } 
    public void setId(long id) { 
     this.id = id; 
    } 
    public String getMessage() { 
     return message; 
    } 
    public void setMessage(String message) { 
     this.message = message; 
    } 
    public String getAuthor() { 
     return author; 
    } 
    public void setAuthor(String author) { 
     this.author = author; 
    } 
} 


@Path("/messages") 
public class MessageResource { 

    private MessageService messageService = new MessageService(); 

    @GET 
    @Produces(MediaType.APPLICATION_JSON) 
    public List<Message> getMessages() { 
     return messageService.getAllMessages(); 
    } 

    @GET 
    @Path("/{messageId}") 
    @Produces(MediaType.APPLICATION_JSON) 
    public Message getMessage(@PathParam("messageId") int messageId) { 
     return messageService.getMessage(messageId); 
    } 

} 

public class MessageService { 

    private Map<Integer, Message> messages = new HashMap<>(); 

    public MessageService() { 
     messages.put(1, new Message(1, "msg1", "author1")); 
     messages.put(2, new Message(2, "msg2", "author2")); 
     messages.put(3, new Message(3, "msg3", "author3")); 
     messages.put(4, new Message(4, "msg4", "author4")); 
     messages.put(5, new Message(5, "msg5", "author5")); 
    } 

    public List<Message> getAllMessages() { 
     return new ArrayList<Message>(messages.values()); 
    } 

    public Message getMessage(int id) { 
     return messages.get(id); 
    } 

} 

public class Client 
{ 

    public static void main(String[] args) 
    { 
     JAXRSClientFactoryBean client = new JAXRSClientFactoryBean(); 
     client.setResourceClass(Message.class); 
     client.setAddress("http://localhost:8080/messenger/messages/4"); 
     WebClient wc = client.createWebClient(); 
     Message msg = wc.get(Message.class); 
     System.out.println(msg); 
    } 
} 

public class Server { 

    public static void main(String[] args) { 
     JAXRSServerFactoryBean serverFactory = new JAXRSServerFactoryBean(); 
     serverFactory.setResourceClasses(MessageResource.class); 
     serverFactory.setResourceProvider(MessageResource.class, 
       new SingletonResourceProvider(new MessageResource())); 
     serverFactory.setAddress("http://localhost:8080/messenger/"); 
     serverFactory.setProvider(JacksonJsonProvider.class); 
     serverFactory.create(); 
    } 

}

我得到這個錯誤：No message body reader has been found for class app.Message, ContentType: application/json。

誰能告訴我我做錯了什麼？我想獲得一個Message對象作爲迴應。

來源

2015-08-31 dres

根據[此線索]（http://stackoverflow.com/questions/24653329/jaxrs-client-cont-find-message-body-writer/25536584#25536584），你需要在一個JSON提供您的運行。你是否有一個？ – beosign

你可以嘗試更新你這樣的服務器類嗎？您可能需要將擴展映射添加到Server Factory Bean。

JAXRSServerFactoryBean serverFactory = new JAXRSServerFactoryBean(); 
serverFactory.setResourceClasses(MessageResource.class); 
serverFactory.setResourceProvider(MessageResource.class, new SingletonResourceProvider(new MessageResource())); 
serverFactory.setAddress("http://localhost:8080/messenger/"); 
Map<Object, Object> mappings = new HashMap<Object, Object>(); 
mappings.put("xml", "application/xml"); 
mappings.put("json", "application/json"); 
serverFactory.setExtensionMappings(mappings); 
serverFactory.setProvider(JacksonJsonProvider.class); 
serverFactory.create();

來源

2015-09-01 06:18:19 Garry

其他Web服務獲取對象作爲響應

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