HTTP Status 500 – Internal Server Error
Type Exception ReportMessage Servlet execution threw an exceptionDescription The server encountered an unexpected condition that prevented it from fulfilling the request.Exceptionjavax.servlet.ServletException: Servlet execution threw an exception
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Root Causejava.lang.NoClassDefFoundError: org/apache/commons/beanutils/BeanUtils
servilet.Loginservlet.doGet(Loginservlet.java:29)
javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Root Causejava.lang.ClassNotFoundException: org.apache.commons.beanutils.BeanUtils
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1360)
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1182)
servilet.Loginservlet.doGet(Loginservlet.java:29)
javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Note The full stack trace of the root cause is available in the server logs.Apache Tomcat/8.5.43
Type Exception ReportMessage Servlet execution threw an exceptionDescription The server encountered an unexpected condition that prevented it from fulfilling the request.Exceptionjavax.servlet.ServletException: Servlet execution threw an exception
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Root Causejava.lang.NoClassDefFoundError: org/apache/commons/beanutils/BeanUtils
servilet.Loginservlet.doGet(Loginservlet.java:29)
javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Root Causejava.lang.ClassNotFoundException: org.apache.commons.beanutils.BeanUtils
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1360)
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1182)
servilet.Loginservlet.doGet(Loginservlet.java:29)
javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Note The full stack trace of the root cause is available in the server logs.Apache Tomcat/8.5.43
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29行代码是: BeanUtils.populate(user,parameterMap);