學習REST，停留在IllegalStateException

我正在努力學習ReST工作，我正在嘗試做一個簡單的測試項目來充當煙霧測試。我做了四堂課。學習REST，停留在IllegalStateException

@ApplicationPath("/rest") 
public class RestApplication extends Application 
{ 
}

...

@Path("/testClassURL") 
@Stateless 
public class TestClass { 

    @GET 
    @Produces(MediaType.APPLICATION_JSON) 
    @Path("/testMethodNoParamURL") 
    public TestBean testMethod() { 
     TestBean ret = new TestBean(); 
     ret.setNum(5); 
     ret.setStr("9087".concat("1234")); 
     return ret; 
    } 
}

另外兩個是僅由getter和setter方法的簡單類。你可以在那裏看到他們。基於我設置的路徑註釋我應該可以輸入這個URL

localhost:8080/TestWebRest/testClassURL/testMethodNoParamURL

這應該讓我得到一個JSON響應。不幸的是，我得到的是以下500個錯誤

[2014-10-01T20:00:02.360-0400] [glassfish 4.0] [WARNING] [] [javax.enterprise.web] [tid: _ThreadID=24 _ThreadName=http-listener-1(4)] [timeMillis: 1412208002360] [levelValue: 900] [[ 
StandardWrapperValve[testyTest.RestApplication]: Allocate exception for servlet testyTest.RestApplication 
java.lang.IllegalStateException: The resource configuration is not modifiable in this context. 
at org.glassfish.jersey.server.ResourceConfig$ImmutableState.register(ResourceConfig.java:257) 
at org.glassfish.jersey.server.ResourceConfig$ImmutableState.register(ResourceConfig.java:205) 
at org.glassfish.jersey.server.ResourceConfig.register(ResourceConfig.java:435) 
at org.glassfish.jersey.servlet.WebComponent.<init>(WebComponent.java:261) 
at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:167) 
at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:349) 
at javax.servlet.GenericServlet.init(GenericServlet.java:244) 
at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1583) 
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:1225) 
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:237) 
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160) 
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734) 
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673) 
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99) 
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174) 
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:357) 
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:260) 
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:188) 
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:191) 
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:168) 
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:189) 
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119) 
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:288) 
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:206) 
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:136) 
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:114) 
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77) 
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:838) 
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:113) 
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:115) 
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:55) 
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:135) 
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:564) 
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:544) 
at java.lang.Thread.run(Thread.java:745)

這個看起來對任何人都很熟悉嗎？

來源

2014-10-02 John M

原因是您有兩個或更多適用於該URL調用的映射。

例如：

@Path("/{myParam}")

而且別的地方：

@Path("/{differentParam}")

來源

2014-10-02 00:05:27 StackFlowed

這是奇怪的。我有映射兩種方法，一種映射到 @Path（「/ testMethodURL」）而其他映射到 @Path（「/ testMethodNoParamURL」）他們顯然是不同的，但他們的衝突。他們可以不在同一班嗎？ – 2014-10-02 01:13:02

這爲我解決了它/查明問題。堆棧跟蹤非常缺乏信息，至少對於不瞭解Jersey框架內部工作原理的人來說。我想知道爲什麼澤西不會拋出某種「DuplicateResourcePathFoundException」。 – Hervian 2016-06-28 09:06:18

@Path("/testClassURL")

@Path("testMethodNoParamURL")沒有斜槓

然後

localhost:8080/TestWebRest/testClassURL/testMethodNoParamURL

如果斜線不會被刪除澤西可能嘗試解析到

localhost:8080/TestWebRest/testMethodNoParamURL

來源

2015-03-12 16:28:39 angelito

學習REST，停留在IllegalStateException

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