8.0w+
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急急！jsp加载bean是出现的错误，请各位帮我看看
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 51 in the jsp file: /jspdev/manage.jsp
Generated servlet error:
[javac] Compiling 1 source file
D:\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\jspdev\manage_jsp.java:94: cannot resolve symbol
symbol : class Product
location: class org.apache.jsp.jspdev.manage_jsp
Product product = null;
^
An error occurred at line: 51 in the jsp file: /jspdev/manage.jsp
Generated servlet error:
D:\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\jspdev\manage_jsp.java:96: cannot resolve symbol
symbol : class Product
location: class org.apache.jsp.jspdev.manage_jsp
product = (Product) _jspx_page_context.getAttribute("product", PageContext.PAGE_SCOPE);
^
An error occurred at line: 51 in the jsp file: /jspdev/manage.jsp
Generated servlet error:
D:\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\jspdev\manage_jsp.java:98: cannot resolve symbol
symbol : class Product
location: class org.apache.jsp.jspdev.manage_jsp
product = new Product();
^
3 errors
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:127)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:351)
org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:415)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:458)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:553)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:291)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
note The full stack trace of the root cause is available in the Tomcat logs.
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 51 in the jsp file: /jspdev/manage.jsp
Generated servlet error:
[javac] Compiling 1 source file
D:\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\jspdev\manage_jsp.java:94: cannot resolve symbol
symbol : class Product
location: class org.apache.jsp.jspdev.manage_jsp
Product product = null;
^
An error occurred at line: 51 in the jsp file: /jspdev/manage.jsp
Generated servlet error:
D:\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\jspdev\manage_jsp.java:96: cannot resolve symbol
symbol : class Product
location: class org.apache.jsp.jspdev.manage_jsp
product = (Product) _jspx_page_context.getAttribute("product", PageContext.PAGE_SCOPE);
^
An error occurred at line: 51 in the jsp file: /jspdev/manage.jsp
Generated servlet error:
D:\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\jspdev\manage_jsp.java:98: cannot resolve symbol
symbol : class Product
location: class org.apache.jsp.jspdev.manage_jsp
product = new Product();
^
3 errors
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:127)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:351)
org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:415)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:458)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:553)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:291)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
note The full stack trace of the root cause is available in the Tomcat logs.
...全文
当前发帖距今超过3年，不再开放新的回复
发表回复
amortal 2004-04-09
Product是你自己的类吧，应该也要做类似的import啊
<%@ page import="com.DatabaseConn"%>
还有，条件应该是
if(rs.next()){
！不要
<%@ page import="com.DatabaseConn"%>
还有，条件应该是
if(rs.next()){
！不要
wypang0903 2004-04-09
你能确保bean文件的位置吗？
web-inf/classes/com/DatabaseConn
web-inf/classes/com/DatabaseConn
onguca 2004-04-08
Product类和product.jsp太长了，所以我没贴上来，我贴上来的这段代码也出现了类的实例加载不上去的问题，至于你提出错误的那段我改成：
if(!rs.next()){
session.setAttribute("userid",username);
session.setAttribute("name",rs.getString("name"));
session.setAttribute("phone",rs.getString("phone"));
session.setAttribute("street",rs.getString("street"));
session.setAttribute("state",rs.getString("state"));
session.setAttribute("city",rs.getString("city"));
session.setAttribute("zipCode",rs.getString("zipCode"));
session.setAttribute("email",rs.getString("email"));
session.setAttribute("cardNumber",rs.getString("cardNumber"));
session.setAttribute("cardType",rs.getInt("cardType"));
session.setAttribute("userType",rs.Int("userType"));
int count=result.getInt("userLogCount");
session.setAttribute("userLogCount",new Integer(count));
--------------------------------------------
对吗？但是那个实例加载问题还是没解决呀
if(!rs.next()){
session.setAttribute("userid",username);
session.setAttribute("name",rs.getString("name"));
session.setAttribute("phone",rs.getString("phone"));
session.setAttribute("street",rs.getString("street"));
session.setAttribute("state",rs.getString("state"));
session.setAttribute("city",rs.getString("city"));
session.setAttribute("zipCode",rs.getString("zipCode"));
session.setAttribute("email",rs.getString("email"));
session.setAttribute("cardNumber",rs.getString("cardNumber"));
session.setAttribute("cardType",rs.getInt("cardType"));
session.setAttribute("userType",rs.Int("userType"));
int count=result.getInt("userLogCount");
session.setAttribute("userLogCount",new Integer(count));
--------------------------------------------
对吗？但是那个实例加载问题还是没解决呀
wypang0903 2004-04-08
if(rs!=null){
session.setAttribute("userid",username);
session.setAttribute("name",rs.getString("name"));
session.setAttribute("phone",rs.getString("phone"));
session.setAttribute("street",rs.getString("street"));
session.setAttribute("state",rs.getString("state"));
session.setAttribute("city",rs.getString("city"));
session.setAttribute("zipCode",rs.getString("zipCode"));
session.setAttribute("email",rs.getString("email"));
session.setAttribute("cardNumber",rs.getString("cardNumber"));
session.setAttribute("cardType",rs.getInt("cardType"));
session.setAttribute("userType",rs.Int("userType"));
int count=result.getInt("userLogCount");
session.setAttribute("userLogCount",new Integer(count));
===========================
你这样能出来数据么，指针在第一行之前那
session.setAttribute("userid",username);
session.setAttribute("name",rs.getString("name"));
session.setAttribute("phone",rs.getString("phone"));
session.setAttribute("street",rs.getString("street"));
session.setAttribute("state",rs.getString("state"));
session.setAttribute("city",rs.getString("city"));
session.setAttribute("zipCode",rs.getString("zipCode"));
session.setAttribute("email",rs.getString("email"));
session.setAttribute("cardNumber",rs.getString("cardNumber"));
session.setAttribute("cardType",rs.getInt("cardType"));
session.setAttribute("userType",rs.Int("userType"));
int count=result.getInt("userLogCount");
session.setAttribute("userLogCount",new Integer(count));
===========================
你这样能出来数据么，指针在第一行之前那
wypang0903 2004-04-08
你这些文件中没有用到Product product呀，怎么会报他的错呢？
onguca 2004-04-08
JSP login.jsp
<%@ page contentType="text/html; charset=gb2312" language="java" errorPage="" %>
<%@ page import="java.sql.*"%>
<%@ page import="com.DatabaseConn"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<jsp:useBean id="login" scope="page" class="com.Login">
<jsp:setProperty name="login" property="UserName" param="username"/>
<jsp:setProperty name="login" property="Password" param="password"/>
</jsp:useBean>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>
<body>
<%
String username=request.getParameter("username");
String password=request.getParameter("passwrod");
Connection mycon=null;
Statement stmt=null;
ResultSet rs=null;
DatabaseConn con;
mycon=con.getConnection();
rs=login.Loginning();
if(rs!=null){
session.setAttribute("userid",username);
session.setAttribute("name",rs.getString("name"));
session.setAttribute("phone",rs.getString("phone"));
session.setAttribute("street",rs.getString("street"));
session.setAttribute("state",rs.getString("state"));
session.setAttribute("city",rs.getString("city"));
session.setAttribute("zipCode",rs.getString("zipCode"));
session.setAttribute("email",rs.getString("email"));
session.setAttribute("cardNumber",rs.getString("cardNumber"));
session.setAttribute("cardType",rs.getInt("cardType"));
session.setAttribute("userType",rs.Int("userType"));
int count=result.getInt("userLogCount");
session.setAttribute("userLogCount",new Integer(count));
count++;
session.setAttribute("userLastLogTime",result.getString("userLastLogTime"));
java.util.Date time1=new java.util.Date();//获得系统当前时间
String sqltime=new Timestamp(time1.getTime()).toString();//将当前时间转换成sql server可以识别的对象
//更新登录信息。
stmt=mycon.CreateStatement();
stmt.execute("update user_info set userLogCount="+count+",userLastLogTime='"+sqltime+"' where userId='" + id +"'");
//关闭数据库连接相关的资源。
response.sendRedirect("index.jsp");
}
else {
response.sendRedirect("index.jsp");
}
%>
</body>
</html>
BEAN login.java
/*
* 创建日期 2004-3-27
*
* 更改所生成文件模板为
* 窗口 > 首选项 > Java > 代码生成 > 代码和注释
*/
package com;
import java.sql.*;
import com.DatabaseConn;
/**
* @author Sant
*
* 更改所生成类型注释的模板为
* 窗口 > 首选项 > Java > 代码生成 > 代码和注释
*/
public class Login {
static Connection mycon;
DatabaseConn con;
Statement stmt;
private String UserName;
private String Password;
//DatabaseConn con;
public ResultSet Loginning(){
String sql;
int count;
ResultSet rs = null;
try{
mycon = con.getConnection();
stmt = mycon.createStatement();
sql = "select * from user_info where userid='"+ UserName +"'and password='"+ Password +"'";
rs = stmt.executeQuery(sql);
if (!rs.next()){
rs = null;
mycon.close();
stmt.close();
}
}catch(SQLException se){
System.err.println("jspdev.Login.Loginning(): "+se.getMessage());
}
return rs;
}
/**
* @return
*/
public String getPassword() {
return this.Password;
}
/**
* @return
*/
public String getUserName() {
return this.UserName;
}
/**
* @param string
*/
public void setPassword(String password) {
this.Password = password;
}
/**
* @param string
*/
public void setUserName(String username) {
this.UserName = username;
}
}
<%@ page contentType="text/html; charset=gb2312" language="java" errorPage="" %>
<%@ page import="java.sql.*"%>
<%@ page import="com.DatabaseConn"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<jsp:useBean id="login" scope="page" class="com.Login">
<jsp:setProperty name="login" property="UserName" param="username"/>
<jsp:setProperty name="login" property="Password" param="password"/>
</jsp:useBean>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>
<body>
<%
String username=request.getParameter("username");
String password=request.getParameter("passwrod");
Connection mycon=null;
Statement stmt=null;
ResultSet rs=null;
DatabaseConn con;
mycon=con.getConnection();
rs=login.Loginning();
if(rs!=null){
session.setAttribute("userid",username);
session.setAttribute("name",rs.getString("name"));
session.setAttribute("phone",rs.getString("phone"));
session.setAttribute("street",rs.getString("street"));
session.setAttribute("state",rs.getString("state"));
session.setAttribute("city",rs.getString("city"));
session.setAttribute("zipCode",rs.getString("zipCode"));
session.setAttribute("email",rs.getString("email"));
session.setAttribute("cardNumber",rs.getString("cardNumber"));
session.setAttribute("cardType",rs.getInt("cardType"));
session.setAttribute("userType",rs.Int("userType"));
int count=result.getInt("userLogCount");
session.setAttribute("userLogCount",new Integer(count));
count++;
session.setAttribute("userLastLogTime",result.getString("userLastLogTime"));
java.util.Date time1=new java.util.Date();//获得系统当前时间
String sqltime=new Timestamp(time1.getTime()).toString();//将当前时间转换成sql server可以识别的对象
//更新登录信息。
stmt=mycon.CreateStatement();
stmt.execute("update user_info set userLogCount="+count+",userLastLogTime='"+sqltime+"' where userId='" + id +"'");
//关闭数据库连接相关的资源。
response.sendRedirect("index.jsp");
}
else {
response.sendRedirect("index.jsp");
}
%>
</body>
</html>
BEAN login.java
/*
* 创建日期 2004-3-27
*
* 更改所生成文件模板为
* 窗口 > 首选项 > Java > 代码生成 > 代码和注释
*/
package com;
import java.sql.*;
import com.DatabaseConn;
/**
* @author Sant
*
* 更改所生成类型注释的模板为
* 窗口 > 首选项 > Java > 代码生成 > 代码和注释
*/
public class Login {
static Connection mycon;
DatabaseConn con;
Statement stmt;
private String UserName;
private String Password;
//DatabaseConn con;
public ResultSet Loginning(){
String sql;
int count;
ResultSet rs = null;
try{
mycon = con.getConnection();
stmt = mycon.createStatement();
sql = "select * from user_info where userid='"+ UserName +"'and password='"+ Password +"'";
rs = stmt.executeQuery(sql);
if (!rs.next()){
rs = null;
mycon.close();
stmt.close();
}
}catch(SQLException se){
System.err.println("jspdev.Login.Loginning(): "+se.getMessage());
}
return rs;
}
/**
* @return
*/
public String getPassword() {
return this.Password;
}
/**
* @return
*/
public String getUserName() {
return this.UserName;
}
/**
* @param string
*/
public void setPassword(String password) {
this.Password = password;
}
/**
* @param string
*/
public void setUserName(String username) {
this.UserName = username;
}
}
wypang0903 2004-04-08
肯定是导入有问题，否则他的实例是不会建立失败的
wypang0903 2004-04-08
你最好能把你的代码贴上来，有很多东西不看源码是找不到答案的
onguca 2004-04-08
导入了呀，包的路径也都是对的，就是找不到哪里错了
wypang0903 2004-04-08
估计是你的BEAN没有导入的问题
hup 2004-04-08
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