Javaweb服务器输入数据查询后报错500，Java Web服务器数据查询错误500的排查与解决过程

排查Java Web服务器数据查询错误500的过程涉及检查服务器配置、数据库连接、SQL语句语法、服务器日志以及资源限制等。首先确认错误原因，然后逐步检查代码逻辑、数据库状态和服务器设置，最后通过调整配置或修复代码来解决报错问题。

在Java Web开发过程中，数据查询是常见操作，在实际开发过程中，我们可能会遇到数据查询后报错500的情况，本文将针对这种情况，详细分析问题原因，并提供相应的解决方法。

问题现象

在Java Web项目中，当进行数据查询操作时，服务器返回500错误，错误信息如下：

HTTP Status 500 - Servlet execution threw an exception
type Exception report
message Servlet execution threw an exception
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
java.lang.RuntimeException: java.sql.SQLException: ORA-00942: table or view does not exist
    at com.example.mapper.UserMapper.selectUserById(UserMapper.java:15)
    at com.example.controller.UserController.getUserById(UserController.java:21)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleExecutionException(RequestMappingHandlerAdapter.java:806)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleException(RequestMappingHandlerAdapter.java:726)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:646)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:578)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:494)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1417)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1377)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:748)
root cause
java.sql.SQLException: ORA-00942: table or view does not exist
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1506)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1500)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1494)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1488)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1482)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1476)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1468)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1456)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1440)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1434)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1428)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1412)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1406)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1390)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1384)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1378)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1368)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1352)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1346)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1338)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1322)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1316)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1308)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1292)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1286)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1278)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1268)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1258)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1248)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1238)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1228)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1218)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1208)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1198)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1188)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1178)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1168)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1158)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1148)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1138)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1128)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1118)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1108)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1098)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1088)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1078)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1068)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1058)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1048)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1038)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1028)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1018)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:1008)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:998)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:988)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:978)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:968)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:958)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:948)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:938)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:928)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:918)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:908)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:898)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:888)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:878)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:868)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:858)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:848)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:838)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:828)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:818)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:808)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:798)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:788)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:778)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:768)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:758)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:748)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:738)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:728)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:718)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:708)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:698)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:688)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:678)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:668)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:658)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:648)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:638)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:628)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:618)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:608)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:598)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:588)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:578)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:568)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:558)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:548)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:538)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:528)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:518)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:508)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:498)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:488)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:478)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:468)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:458)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:448)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:438)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:428)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:418)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:408)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:398)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:388)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:378)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:368)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:358)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:348)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:338)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:328)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:318)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:308)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:298)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:288)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:278)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:268)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:258)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:248)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:238)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:228)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:218)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:208)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:198)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:188)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:178)
    at oracle.jdbc.driver.T4C8Oall.makeException(T4C8Oall.java:168)
    at oracle.jdbc.driver.T4C8