net.sf.json.JSONException: JSONO

从小程序端获取openId时，出现这样的错误net.sf.json.JSONException: JSONObject[“openId”] not found

原因：找不到openId，因为没有从小程序端获取到openId

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解决办法：可在获取openId前进行判断，若没有找到openId，就设置默认值

//判断是否获取到openId

if (!json.has("openId")){

json.put("openId", "");

}

---

获取值的代码：

JSONObject json = AcceptUtil.acceptFile(request);

//判断是否获取到openId

if (!json.has("openId")){

json.put("openId", "");

}

String openId = json.getString("openId");

---

报错信息：

net.sf.json.JSONException: JSONObject[“openId”] not found.

at net.sf.json.JSONObject.get(JSONObject.java:1228)

at net.sf.json.JSONObject.getString(JSONObject.java:1353)

at servlet.weixin.History.doPost(History.java:41)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)

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 filter.EncodeFilter.doFilter(EncodeFilter.java:37)

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:218)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:506)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)

at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:452)

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1087)

at org.apache.coyote.AbstractProtocolAbstractConnectionHandler.process(AbstractProtocol.java:637)atorg.apache.tomcat.util.net.AprEndpointAbstractConnectionHandler.process(AbstractProtocol.java:637)atorg.apache.tomcat.util.net.AprEndpointSocketProcessor.doRun(AprEndpoint.java:2536)

at org.apache.tomcat.util.net.AprEndpointSocketProcessor.run(AprEndpoint.java:2525)atjava.util.concurrent.ThreadPoolExecutor.runWorker(UnknownSource)atjava.util.concurrent.ThreadPoolExecutorSocketProcessor.run(AprEndpoint.java:2525)atjava.util.concurrent.ThreadPoolExecutor.runWorker(UnknownSource)atjava.util.concurrent.ThreadPoolExecutorWorker.run(Unknown Source)

at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

at java.lang.Thread.run(Unknown Source)