麻烦大家帮忙看看一下问题所在,谢谢了

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麻烦大家帮忙看看一下问题所在,谢谢了

java.lang.NullPointerException

at java.util.Properties$LineReader.readLine(Properties.java:434)

at java.util.Properties.load0(Properties.java:353)

at java.util.Properties.load(Properties.java:341)

at dao.CommDAO.<clinit>(CommDAO.java:47)

at org.apache.jsp.welcome_jsp._jspService(welcome_jsp.java:124)

at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)

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

at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:439)

at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)

at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)

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 util.SetChar.doFilter(SetChar.java:26)

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:122)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)

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:958)

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.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)

at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2517)

at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2506)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

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

at java.lang.Thread.run(Thread.java:745)

com.mysql.jdbc.exceptions.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '5 * from notice order by savetime desc' at line 1

--select top 5 * from notice order by savetime desc

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:936)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2934)

at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1616)

at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1708)

at com.mysql.jdbc.Connection.execSQL(Connection.java:3249)

at com.mysql.jdbc.Connection.execSQL(Connection.java:3178)

at com.mysql.jdbc.Statement.executeQuery(Statement.java:1203)

at dao.CommDAO.select(CommDAO.java:165)

at org.apache.jsp.welcome_jsp._jspService(welcome_jsp.java:128)