我提出了从Web服务获取令牌的特殊请求，但我一直收到以下错误消息：
ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/HO_JOBS].[resteasy-servlet]] (http-DRBPWB02%2F10.121.9.67-8150-1) Servlet.service() for servlet resteasy-servlet threw exception: org.jboss.resteasy.spi.UnhandledException: java.lang.NullPointerException
at org.jboss.resteasy.core.SynchronousDispatcher.unwrapException(SynchronousDispatcher.java:345)
at org.jboss.resteasy.core.SynchronousDispatcher.handleApplicationException(SynchronousDispatcher.java:321)
at org.jboss.resteasy.core.SynchronousDispatcher.handleException(SynchronousDispatcher.java:214)
at org.jboss.resteasy.core.SynchronousDispatcher.handleInvokerException(SynchronousDispatcher.java:190)
at org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:534)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:496)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:119)
at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:324)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:242)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:181)
at org.jboss.modcluster.catalina.CatalinaContext$RequestListenerValve.event(CatalinaContext.java:285)
at org.jboss.modcluster.catalina.CatalinaContext$RequestListenerValve.invoke(CatalinaContext.java:261)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:88)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:100)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:159)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.jboss.web.tomcat.service.request.ActiveRequestResponseCacheValve.invoke(ActiveRequestResponseCacheValve.java:53)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:362)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:654)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:951)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.NullPointerException
at com.sm.bps.api.nuvelco.NuvelcoUtil.getToken(NuvelcoUtil.java:27)
at com.sm.bps.api.nuvelco.NuvelcoService.getToken(NuvelcoService.java:18)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:140)
at org.jboss.resteasy.core.ResourceMethod.invokeOnTarget(ResourceMethod.java:255)
at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:220)
at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:209)
at org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:519)
... 25 more
我的班级部署在jBoss应用程序服务器中。作为新手，我从字面上无法确定哪里出了问题。如果我做错了任何事情，请检查我的源代码：
package com.sm.bps.api.nuvelco;
import org.apache.log4j.Logger;
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;
import com.mashape.unirest.http.exceptions.UnirestException;
public class NuvelcoUtil {
protected static Logger logger = Logger.getLogger(NuvelcoUtil.class);
public static String getToken() {
HttpResponse<String> response = null;
try {
response = Unirest.post("http://api.nuvelco.com/token")
.header("content-type", "application/x-www-form-urlencoded")
.header("cache-control", "no-cache")
.body("grant_type=password&username=demo_user&password=demo_pass&client_id=paymentApp")
.asString();
} catch (UnirestException e) {
e.printStackTrace();
}
return response.getBody();
}
public static String refreshToken() {
HttpResponse<String> response = null;
try {
response = Unirest.post("http://api.nuvelco.com/token")
.header("content-type", "application/x-www-form-urlencoded")
.header("cache-control", "no-cache")
.body("refresh_token=5a788c269d714dbabcf77e2aa19b95e2&grant_type=refresh_token&client_id=paymentApp")
.asString();
} catch (UnirestException e) {
e.printStackTrace();
}
return response.getStatusText();
}
public static String getConsumerBill(String accNum) {
HttpResponse<String> response = null;
try {
response = Unirest.post("http://api.nuvelco.com/v1/bill/inquiry")
.header("accept", "application/json")
.header("content-type", "application/json")
.header("authorization", "Bearer ivEKsRy0eg4dZ4MFDutQ4SYKYxmapmUkluabdXR26lmjpqqQ1ipyTF71HHcPzbkpXQkYCyS2H4zafmKTiIPsKaiosGP5SAxCL6__qe9yYCbHdmuKRIAjW cBn2WC5tYunMJiht4PlBA_UAx4NDSNV2Ozjt07pRzFQvntto-T87YZ4XADDCzpmRo-Ti43uuiRyNrcn6crhlUKkKZqyGiv_5QVdmzA2xRZgz_SqbVBi4VQIzyNqWf32WrC_LmxTxAw-d6rICYjTYFspwtaNq_aJMFDQBLQPPyHoNjVGmRZLdwiLtBn4INdnkwmvOBvPAf6_7peYQ1i3pBw7Ar6aOcw")
.header("cache-control", "no-cache")
.body("{\"accountNo\":\"" + accNum + "\"}")
.asString();
} catch (UnirestException e) {
e.printStackTrace();
}
return response.getStatusText();
}
}
任何帮助将不胜感激。谢谢。