Java HTTP状态500-内部服务器错误-JSP-玻璃鱼服务器_Java_Jsp_Netbeans_Glassfish

Java HTTP状态500-内部服务器错误-JSP-玻璃鱼服务器

java jsp netbeans glassfish

Java HTTP状态500-内部服务器错误-JSP-玻璃鱼服务器,java,jsp,netbeans,glassfish,Java,Jsp,Netbeans,Glassfish,作为Jsp和Java的初学者，我正在构建一个简单的web应用程序，它将数据从数据库显示到网页当我运行下面的代码时，我得到以下错误HTTP状态500-内部服务器错误在NetBeans和web服务器中构建web应用程序是玻璃鱼不知道出了什么问题。仍在搜索谷歌，但还没有运气 type Exception report messageInternal Server Error descriptionThe server encountered an internal error that pr

作为Jsp和Java的初学者，我正在构建一个简单的web应用程序，它将数据从数据库显示到网页

当我运行下面的代码时，我得到以下错误HTTP状态500-内部服务器错误
在NetBeans和web服务器中构建web应用程序是玻璃鱼
不知道出了什么问题。仍在搜索谷歌，但还没有运气

type Exception report messageInternal Server Error descriptionThe server encountered an internal error that prevented it from fulfilling this request. exception org.apache.jasper.JasperException: java.lang.NullPointerException root cause java.lang.NullPointerException
更新1:

Warning: StandardWrapperValve[jsp]: Servlet.service() for servlet jsp threw exception java.lang.NullPointerException at org.apache.jsp.nextPage_jsp._jspService(nextPage_jsp.java:111) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111) at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:411) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:473) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:377) at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160) at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673) at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174) at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:415) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:282) at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459) at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167) at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:201) at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:175) at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235) at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119) at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284) at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201) at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133) at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112) at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77) at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:561) at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112) at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117) at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56) at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137) at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:565) at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:545) at java.lang.Thread.run(Thread.java:745)
Index.jsp

<%-- Document : index Created on : Jan 1, 2015, 7:36:04 PM Author : ksathis --%> <%@page contentType="text/html" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Inside</title> </head> <body> <h1>Inside</h1> <form name="mainForm" action="nextPage.jsp" method="POST"> <table border="0"> <tbody> <tr> <td>DateRange</td> <td><input type="radio" name="radioS" id="dateRadio" value="1" /></td> <td><input type="date" name="date1" value="0" size="10" /></td> <td><input type="date" name="date2" value="0" size="10" /></td> </tr> <tr> <td>WeekNum</td> <td><input type="radio" name="radioS" id="weekRadio" value="1" /></td> <td><input type="text" name="weeknum1" id="weeknum1" value="0" size="10" /></td> </tr> <tr> <td>MonthNum</td> <td><input type="radio" name="radioS" id="monthRadio" value="1" /></td> <td><input type="text" name="monthnum1" value="0" size="10" /></td> </tr> <tr> <td></td> <td></td> <td><input type="reset" value="Clear" name="Clear" size="10"/><input type="submit" value="submit" name="Clear" size="10"/></td> </tr> </tbody> </table> </form> </body> </html>

<%-- Document : nextPage Created on : Jan 1, 2015, 7:55:59 PM Author : ksathis --%> <%@page import="java.sql.*" %> <% Class.forName("com.mysql.jdbc.Driver"); %> <%@page contentType="text/html" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Result</title> </head> <body> <h1>DIS SLA RESULT FOR THE WEEK !</h1> <%! public class imaging { String URL = "jdbc:mysql://localhost:3306/database1"; String USERNAME = "root"; String PASSWORD = "password"; Connection connection = null; PreparedStatement selectRetouch = null; ResultSet resultSet = null; public imaging() { try { connection = DriverManager.getConnection(URL, USERNAME, PASSWORD); selectRetouch = connection.prepareStatement("select * from retouch limit 1 , ?"); } catch (SQLException e) { e.printStackTrace(); } } public ResultSet imaging_Result(String limitone) { try { selectRetouch.setString(1, limitone); resultSet = selectRetouch.executeQuery(); } catch (SQLException e) { e.printStackTrace(); } return resultSet; } } %> <% String str = new String(); str = request.getParameter("weeknum1"); imaging image = new imaging(); ResultSet images = image.imaging_Result(str); %> <table border="1"> <tbody> <tr> <td>Retail_sku</td> <td>Region</td> </tr> <% while (images.next()) {%> <tr> <td><%= images.getString("retail_sku")%></td> <td><%= images.getString("region")%></td> </tr> <% }%> </tbody> </table> </body> </html>

在…内在…内日期范围周数蒙特纳姆
Nextpage.jsp

<%-- Document : index Created on : Jan 1, 2015, 7:36:04 PM Author : ksathis --%> <%@page contentType="text/html" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Inside</title> </head> <body> <h1>Inside</h1> <form name="mainForm" action="nextPage.jsp" method="POST"> <table border="0"> <tbody> <tr> <td>DateRange</td> <td><input type="radio" name="radioS" id="dateRadio" value="1" /></td> <td><input type="date" name="date1" value="0" size="10" /></td> <td><input type="date" name="date2" value="0" size="10" /></td> </tr> <tr> <td>WeekNum</td> <td><input type="radio" name="radioS" id="weekRadio" value="1" /></td> <td><input type="text" name="weeknum1" id="weeknum1" value="0" size="10" /></td> </tr> <tr> <td>MonthNum</td> <td><input type="radio" name="radioS" id="monthRadio" value="1" /></td> <td><input type="text" name="monthnum1" value="0" size="10" /></td> </tr> <tr> <td></td> <td></td> <td><input type="reset" value="Clear" name="Clear" size="10"/><input type="submit" value="submit" name="Clear" size="10"/></td> </tr> </tbody> </table> </form> </body> </html>

<%-- Document : nextPage Created on : Jan 1, 2015, 7:55:59 PM Author : ksathis --%> <%@page import="java.sql.*" %> <% Class.forName("com.mysql.jdbc.Driver"); %> <%@page contentType="text/html" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Result</title> </head> <body> <h1>DIS SLA RESULT FOR THE WEEK !</h1> <%! public class imaging { String URL = "jdbc:mysql://localhost:3306/database1"; String USERNAME = "root"; String PASSWORD = "password"; Connection connection = null; PreparedStatement selectRetouch = null; ResultSet resultSet = null; public imaging() { try { connection = DriverManager.getConnection(URL, USERNAME, PASSWORD); selectRetouch = connection.prepareStatement("select * from retouch limit 1 , ?"); } catch (SQLException e) { e.printStackTrace(); } } public ResultSet imaging_Result(String limitone) { try { selectRetouch.setString(1, limitone); resultSet = selectRetouch.executeQuery(); } catch (SQLException e) { e.printStackTrace(); } return resultSet; } } %> <% String str = new String(); str = request.getParameter("weeknum1"); imaging image = new imaging(); ResultSet images = image.imaging_Result(str); %> <table border="1"> <tbody> <tr> <td>Retail_sku</td> <td>Region</td> </tr> <% while (images.next()) {%> <tr> <td><%= images.getString("retail_sku")%></td> <td><%= images.getString("region")%></td> </tr> <% }%> </tbody> </table> </body> </html>

结果本周的成绩！零售单品区域
请先重新安排导入和声明，然后作为脚本加载驱动程序：

<%@ page import="java.sql.*" %> <%@ page contentType="text/html" pageEncoding="UTF-8"%> <% Class.forName("com.mysql.jdbc.Driver"); %>
因为您正在设置一个限制值，所以驱动程序需要的是一个整数值，而不是字符串。要解决此问题，这里有一个解决方法：

selectRetouch.setInt(1, Integer.parseInt(limitone));
要通过URL对此进行测试，请直接点击链接并传递请求参数，例如：

http://localhost:8080/yourappname/yourpage.jsp?weeknum1=12

您没有发布完整的异常堆栈跟踪。在哪一行出现了更新1部分中更新的
NullPointerException
？@unwichtich请检查我的答案，我添加了更多内容。我想限制用户限制行数。是的，如果我取消注释该行，它将起作用。但我需要从用户那里获得输入，然后我必须使用sql查询。更新了我的问题（删除了limt 1,10，添加了1，？）。对不起，太好了。谢谢兄弟：）