jsp页面报错 HTTP Status 500
HTTP Status 500 - An exception occurred processing JSP page /SearchList.jsp at line 27
--------------------------------------------
type Exception report
message An exception occurred processing JSP page /SearchList.jsp at line 27
description The server encountered an internal error that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: An exception occurred processing JSP page /SearchList.jsp at line 27
24: <jsp:useBean id="jBean" class="server.JavaBean"/>
25: <%
26: String sql="select * from student order by id";
27: java.util.List list = sBean.getSearch(sql);
28: for(java.util.Iterator it = list.iterator();it.hasNext();)
29: {
30: jBean=(server.JavaBean)it.next();
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:568)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:470)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
root cause
java.lang.NullPointerException
server.SqlBean.getSearch(SqlBean.java:150)
org.apache.jsp.SearchList_jsp._jspService(SearchList_jsp.java:104)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.42 logs.
代码如下：
<%@ page language="java" import="java.util.*" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>显示记录</title>
</head>
<body>
<center>
<font size=45></font>
<table border=1 width="500px" height="100px">
<tr>
<td>ID</td>
<td>Name</td>
<td>password</td>
</tr>
<jsp:useBean id="sBean" alt="jsp页面报错 HTTP Status 500解决方法" /> jsp? 异常 HTML
[解决办法]
java.lang.NullPointerException
server.SqlBean.getSearch(SqlBean.java:150)
空引用了，，在sqlBean 的150行
