Question

我一直在寻找这个问题的答案，但似乎无法找到解决问题的正确方法。我有一个服务，我在其中调用Web资源：

@POST
@Path("/save")

public Response addPushMessage(@FormParam("key") String key, @FormParam("pid") String pid,  
                                    @FormParam("url") String url, @FormParam("message") String message) throws Throwable {
    if(key == null || key.isEmpty() || pid == null || pid.isEmpty())
            return Response.ok().entity("Error: image key and profile Id are required for push message").build();
    try{
         Date now = new Date();
         BasicDBObject pushMsg = new BasicDBObject("key", key).append("provider", pid).append("createdDate", now);
         if(url!= null)
             pushMsg.append("url", url);
         if(message != null && !message.isEmpty())
             pushMsg.append("message", message);
         pushMsg.append("status", status);
         String pushMsgId = ServiceUtil.mongo.put(GliifConstant.pushMsgCollectionName, pushMsg);

         // Notify Event manager to push events if it's PROD
         // Changed it delibrately to dev for local testing
         if(ServiceUtil.env.equalsIgnoreCase("dev")){
             PushEvent event = new PushEvent();
             event.setCreatedDate(now);
             event.setEventId(pushMsgId);
             event.setKey(key);
             event.setUrl(url);
             event.setStatus(status);
             WebResource clientResource = client.resource(pushURL);
             ClientResponse resp = clientResource.type(MediaType.APPLICATION_JSON).post(ClientResponse.class, event);
        }
         if(pushMsgId != null)
             return Response.ok().entity("OK").build();
         else
             return Response.ok().entity("Error: save push notification failed").build(); 
    }
    catch(Throwable t){
        t.printStackTrace();
        logger.error(PushService.class.getSimpleName()+" addPushNotification() failed on key: " + key + " \n", t);
        return Response.status(GliifWebConstants.HTTP_GLIIF_SERVER_ERROR)
                    .header("HTTP_GLIIF_SERVER_ERROR","Gliif RestFull Service addPushNotification() operation caught runtime exception on saving push message on key:"+ key).build();
    }
}

“推送活动”类的代码：

public class PushEvent implements Serializable {

/**
 * 
 */
private static final long serialVersionUID = 1L;

private String eventId = "";
private String key = null; //must have
private String url = "";
private String message = "";
private Date createdDate = null;
private int status = -1;


public String getKey() {
    return key;
}
public void setKey(String key) {
    this.key = key;
}
public String getUrl() {
    return url;
}
public void setUrl(String url) {
    this.url = url;
}
public String getMessage() {
    return message;
}
public void setMessage(String message) {
    this.message = message;
}
public String getEventId() {
    return eventId;
}
public void setEventId(String eventId) {
    this.eventId = eventId;
}
public Date getCreatedDate() {
    return createdDate;
}
public void setCreatedDate(Date createdDate) {
    this.createdDate = createdDate;
}
public int getStatus() {
    return status;
}
public void setStatus(int status) {
    this.status = status;
}

}

现在，当我运行此操作时，我收到此错误：

找不到Java类型的邮件正文编写器，类com.gliif.model.PushEvent和MIME媒体类型application/json

我已经尝试了一切可能的方法来通过stackoverflow论坛来纠正这个问题，但我无济于事。有人可以帮我解决这个问题吗？：（

Answer 1

您需要在项目中定义一个类，该类为您的PushEvent类实现MessageBodyWriter。这可能看起来像这样。

@Provider
@Produces(MediaType.APPLICATION_JSON)
public final class PushEventWriter implements MessageBodyWriter<PushEvent> {

    // implement methods and serialization

}

在本课程中，您必须实现将PushEvent转换为JSON的方式。使用@Provider注释，如果内容应该是JSON（由于@Produces注释），Jersey将找到此编写器并使用它。

这是一篇描述该过程的好博文：http://programmingitch.blogspot.de/2014/03/creating-simple-jax-rs-messagebodywriter.html

希望这有帮助。

Answer 2

我找到了解决方案。事实证明，球衣配置错了。我所做的只是在代码中添加这些行来创建泽西客户端。

DefaultClientConfig defaultClientConfig = new DefaultClientConfig();
defaultClientConfig.getClasses().add(JacksonJsonProvider.class);
Client client = Client.create(defaultClientConfig);

错误已解决。谢谢Chasmo指出我正确的方向:)。

Jersey API Body Writer问题

2 个答案: