                        课程
                    
                        /后端开发
                        
                            /Java
                        
                        /Java 分页原理与实践（上）

使用dao程模仿老师那个分页功能，为啥网页显示500，后台报错，怎么解决？

Servlet.service() for servlet [JdbcSqlServlet] in context with path [/pager] threw exception

java.lang.RuntimeException: 查询所有数据异常

at com.cxl.page.service.impl.JdbcSqLStudentImpl.findStudent(JdbcSqLStudentImpl.java:77)

at com.cxl.page.service.impl.JdbcSqlStudentServiceImpl.findStudent(JdbcSqlStudentServiceImpl.java:20)

at com.cxl.page.servlet.JdbcSqlServlet.doPost(JdbcSqlServlet.java:66)

at com.cxl.page.servlet.JdbcSqlServlet.doGet(JdbcSqlServlet.java:26)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:635)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)

at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)

at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)

at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799)

at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)

at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)

at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1457)

at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)

at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

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

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

Caused by: com.mysql.jdbc.exceptions.jdbc4.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' at line 1

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)

at java.lang.reflect.Constructor.newInstance(Unknown Source)

at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)

at com.mysql.jdbc.Util.getInstance(Util.java:386)

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1053)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4120)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4052)

at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2503)

at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2664)

at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2794)