不被服務器接受澤西@Consumes @Produces，

我有下面的類：不被服務器接受澤西@Consumes @Produces，

package test 

import org.apache.log4j.Logger; 

import javax.ws.rs.*; 
import javax.ws.rs.core.MediaType; 
import javax.ws.rs.core.Response; 


@Path("/test") 
public class test { 

    private static Logger logger = Logger.getLogger(test.class); 



    @GET 
    public Response getMsg() { 
    logger.info("Inside getMsg()"); 

    String output = "hello world"; 

    return Response.status(200).entity(output).build(); 

    } 

    @GET 
    @Path("/get") 
    @Produces(MediaType.APPLICATION_JSON) 
    public Track getTrackInJSON() { 

     Track track = new Track(); 
     track.setTitle("Enter Sandman"); 
     track.setSinger("Metallica"); 

     return track; 
    } 

    @POST 
    @Path("/post") 
    @Consumes(MediaType.APPLICATION_JSON) 

    public Response createTrackInJSON(Track track) { 
     String result = "Track saved : " + track; 
     return Response.status(201).entity(result).build(); 

    } 
     }

軌道是另一個類的一個對象

我在我的POM以下依賴性：

<dependency> 
    <groupId>com.sun.jersey</groupId> 
    <artifactId>jersey-server</artifactId> 
    <version>1.8</version> 
</dependency> 

<dependency> 
    <groupId>com.sun.jersey</groupId> 
    <artifactId>jersey-client</artifactId> 
    <version>1.8</version> 
</dependency> 

<dependency> 
    <groupId>com.sun.jersey</groupId> 
    <artifactId>jersey-json</artifactId> 
    <version>1.17.1</version> 
</dependency>

，這是我的servlet映射

<servlet-mapping> 
    <servlet-name>jersey-serlvet</servlet-name> 
    <url-pattern>/rest/*</url-pattern> 
</servlet-mapping>

每次我用

BASEURL/REST /測試 - >回答正確（你好世界）

BASEURL/REST /測試/獲取 - >鍵入：Get

響應：<html><head><title>Apache Tomcat/7.0.42 - Error report</title></head><body><h1>HTTP Status 500 - Internal Server Error</h1><HR size="1" noshade="noshade"><p><b>type</b> Status report</p><p><b>message</b> <u>Internal Server Error</u></p><p><b>description</b> <u>The server encountered an internal error that prevented it from fulfilling this request.</u></p><HR size="1" noshade="noshade"><h3>Apache Tomcat/7.0.42</h3></body></html>

也是在tomcat執行，我可以看到錯誤：

2014年1月27日下午一點41分28秒

com.sun.jersey.spi.container.ContainerResponse logException 
SEVERE: Mapped exception to response: 500 (Internal Server Error) 
javax.ws.rs.WebApplicationException: com.sun.jersey.api.MessageException: A message body writer for Java class com.myProj.jsp.rest.Track, and Java type class com.gsipartners.apimgmtut 
     at com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:285) 
     at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1437) 
     at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1349) 
     at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1339) 
     at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416) 
     at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537) 
     at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:699) 
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) 
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) 
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222) 
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) 
     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) 
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) 
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) 
     at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953) 
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) 
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) 
     at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023) 
     at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589) 
     at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310) 
     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) 
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) 
     at java.lang.Thread.run(Thread.java:662) 
Caused by: com.sun.jersey.api.MessageException: A message body writer for Java class com.myProj.jsp.rest.Track, and Java type class com.myProj.jsp.rest.Track, and MIM 
     ... 24 more

我不知道爲什麼這不起作用

來源

2014-01-27 user1801279