81,091
社区成员
发帖
与我相关
我的任务
分享The server encountered an internal error () that prevented it from fulfilling th
急求！！！！请各位大侠帮帮忙，错误！
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: java.lang.NullPointerException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:532)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:426)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause
java.lang.NullPointerException
org.apache.jsp.WebRoot.EnterPage.judge_jsp._jspService(judge_jsp.java:113)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:384)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
note The full stack trace of the root cause is available in the Apache Tomcat/6.0.10 logs.
源代码：
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB18030">
<title>Insert title here</title>
</head>
<body>
<%
String userName = request.getParameter("number");
String password = request.getParameter("password");
String str1 = null;
//out.println(userName);
Statement st = null;
Connection con = null;
ResultSet rs = null;
int i = 0;
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
con = DriverManager.getConnection("jdbc:odbc:sun");
st = con.createStatement();
String sql = "select * from userInformation";
rs = st.executeQuery(sql);
while(rs.next()){
String str = rs.getString(2);
if(str.equals(userName) && str.equals(password))
{
str1 = str;
i ++;
}
}
if(i == 0)
{
String s = "您输入的用户名或密码错误";
String errorInfo = new String(s.getBytes("GB18030") , "ISO-8859-1");
response.sendRedirect("EnterPage.jsp?errorInfo=" + errorInfo);
}
else if(i == 1)
{
response.sendRedirect("/StudentSystem/TheMainPage/TheMainPage.jsp");
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
finally{
try {
rs.close();
st.close();
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
%>
</body>
</html>
在别人的电脑上能运行，我怀疑我的配置有问题tomcat6.0+Myeclipse+sql 2000
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: java.lang.NullPointerException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:532)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:426)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause
java.lang.NullPointerException
org.apache.jsp.WebRoot.EnterPage.judge_jsp._jspService(judge_jsp.java:113)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:384)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
note The full stack trace of the root cause is available in the Apache Tomcat/6.0.10 logs.
源代码：
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB18030">
<title>Insert title here</title>
</head>
<body>
<%
String userName = request.getParameter("number");
String password = request.getParameter("password");
String str1 = null;
//out.println(userName);
Statement st = null;
Connection con = null;
ResultSet rs = null;
int i = 0;
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
con = DriverManager.getConnection("jdbc:odbc:sun");
st = con.createStatement();
String sql = "select * from userInformation";
rs = st.executeQuery(sql);
while(rs.next()){
String str = rs.getString(2);
if(str.equals(userName) && str.equals(password))
{
str1 = str;
i ++;
}
}
if(i == 0)
{
String s = "您输入的用户名或密码错误";
String errorInfo = new String(s.getBytes("GB18030") , "ISO-8859-1");
response.sendRedirect("EnterPage.jsp?errorInfo=" + errorInfo);
}
else if(i == 1)
{
response.sendRedirect("/StudentSystem/TheMainPage/TheMainPage.jsp");
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
finally{
try {
rs.close();
st.close();
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
%>
</body>
</html>
在别人的电脑上能运行，我怀疑我的配置有问题tomcat6.0+Myeclipse+sql 2000
...全文
请发表友善的回复…
发表回复
mengen0608 2012-11-01
- 打赏
- 举报
应该是数据库连接配置问题，看数据库驱动有没有导入
mengen0608 2012-11-01
- 打赏
- 举报
遇到同样的问题、、、
cj6412 2010-10-12
- 打赏
- 举报
帮LZ顶一下，偶也遇到这个问题了，学习
Voney 2010-09-19
- 打赏
- 举报
可是在别人的电脑上运行时很正常的，没有报任何的异常！
magong 2010-09-17
- 打赏
- 举报
你抓的异常信息还不到点，看不出异常根。
除开数据库连接可能除问题之外，你不能直接访问这个页面，否则
抓到的姓名和密码为空，也会引爆此异常。
除开数据库连接可能除问题之外，你不能直接访问这个页面，否则
String userName = request.getParameter("number");
String password = request.getParameter("password");抓到的姓名和密码为空，也会引爆此异常。
Voney 2010-09-16
- 打赏
- 举报
自己动手写的java程序可以成功的取出数据库中的内容，但是网页jsp就不可以，会出现上面的现象，由于自己是刚学的菜鸟级别，很是不明白，什么愿意，在这里谢谢cnmb1！
cnmb1 2010-09-13
- 打赏
- 举报
空指针异常。
别人电脑上能运行说明代码没有问题。
所以应该是数据库连接配置问题。
st = con.createStatement(); 估计是con为null导致异常。debug和system.out一下，很容易就能看出来的
别人电脑上能运行说明代码没有问题。
所以应该是数据库连接配置问题。
st = con.createStatement(); 估计是con为null导致异常。debug和system.out一下，很容易就能看出来的
description The server encountered an internal error that prevented it from fulfilling this request错 maven导入jar包时冲突的解决四种方式问题The server encountered an internal error () that prevented it from fulfilling SSH中错误解决之HTTP 500:The server encountered an internal error exception java.lang.NullPoint--Binrry(冰蕊)