為啥每次回調玩會報openid未找到？？

net.sf.json.JSONException:?JSONObject["openid"]?not?found.
????at?net.sf.json.JSONObject.getString(JSONObject.java:2092)
????at?com.atwjsw.wx.auth.servlet.CallBackServlet.doGet(CallBackServlet.java:38)
????at?javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
????at?javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
????at?org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
????at?org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
????at?org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
????at?org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
????at?org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
????at?org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
????at?org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
????at?org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
????at?org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
????at?org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
????at?org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
????at?org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
????at?org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
????at?org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)
????at?org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
????at?org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
????at?java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
????at?java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
????at?org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
????at?java.lang.Thread.run(Thread.java:745)