如果從JAR啓動，Jetty + Jersey嵌入式服務器無法正常工作

Question

我試圖從類中啓動Jetty服務器。當我嘗試從eclipse運行它時，它工作正常。如果我將它嵌入到JAR中，碼頭服務器就會啓動，但是當我提出請求時，它將返回500代碼響應。這裏是我的課：

@GET 
    @Path("test") 
    @Produces(MediaType.APPLICATION_JSON) 
    public String echo(@QueryParam("testParam")String test){ 
     return test; 
    } 

    private Server server; 

    public synchronized void start(int port) throws Exception { 
     if (server != null) { 
       throw new IllegalStateException("Server is already running"); 
      } 

      ServletContextHandler context = new ServletContextHandler(); 
      context.setContextPath("/"); 
     Map<String,Object> initMap = new HashMap<String, Object>(); 
     initMap.put("com.sun.jersey.api.json.POJOMappingFeature", "true"); 
     initMap.put("com.sun.jersey.config.property.packages", "the.class.package");   
     context.addServlet(new ServletHolder(new ServletContainer(new PackagesResourceConfig(initMap))), "/*"); 

     this.server = new Server(port); 
     this.server.setHandler(context); 
     this.server.start();     
    } 

     public static void main(String[] args) throws Exception { 
     if(args.length != 1) { 
       System.out.println("AnnotatorServer <port>"); 
       System.exit(-1); 
     } 
     JettyServer server = new JettyServer();   
     server.start(Integer.parseInt(args[0])); 
    } 

當我嘗試啓動它嵌入在JAR，服務器啓動，但是當我訪問的方法，我得到以下異常：

Caused by: com.sun.jersey.api.MessageException: A message body writer for Java class java.lang.String, and Java type class java.lang.String, and MIME media  type application/octet-stream was not found 

你有任何想法爲什麼會發生？謝謝！

Answer 1

問題出在POM文件上。依賴關係覆蓋了Meta-Inf /服務中的一些文件。找到解決方案Jersey exception only thrown when depencencies assembled into a single jar