报错信息如下：

org.apache.catalina.core.ApplicationDispatcher invoke

严重: Servlet.service() for servlet jsp threw exception
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
     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:408)
     at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
     at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
     at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2441)
     at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2430)
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
     at java.lang.Thread.run(Thread.java:745)


情况一：

页面所传过来的参数名写错，或者实体没有该参数。

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