• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Jeanne Boyarsky
  • Ron McLeod
  • Paul Clapham
  • Liutauras Vilda
Sheriffs:
  • paul wheaton
  • Rob Spoor
  • Devaka Cooray
Saloon Keepers:
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
  • Frits Walraven
  • Tim Moores
Bartenders:
  • Mikalai Zaikin

error due to accessing database connection using jsp

 
Greenhorn
Posts: 15
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi,

I have an error, during accessing a datbase using jsp:useBean from jsp.Urgent i need this one


my source code ispackage SQLBean;

DbBean.java

import java.sql.*;
import java.io.*;

public class DbBean implements java.io.Serializable{

private String dbDriver = "sun.jdbc.odbc.JdbcOdbcDriver";
private Connection dbCon;

public DbBean(){
super();
}

public boolean connect() throws ClassNotFoundException,SQLException{
Class.forName(dbDriver);
dbCon = DriverManager.getConnection("jdbc dbc:mybean","","");
return true;
}



public void close() throws SQLException{
dbCon.close();
}

public ResultSet execSQL(String sql) throws SQLException{

Statement s = dbCon.createStatement();
ResultSet r = s.executeQuery(sql);
return (r == null) ? null : r;
}

public int updateSQL(String sql) throws SQLException{
Statement s = dbCon.createStatement();
int r = s.executeUpdate(sql);
return (r == 0) ? 0 : r;
}

}


database.jsp
<HTML>
<HEAD><TITLE>DataBase Search</TITLE></HEAD>
<BODY>

<%@ page language="Java" import="java.sql.*" %>

<jsp:useBean id="db" scope="application" class="SQLBean.DbBean" />

<jsp:setProperty name="db" property="*" />

<center>
<h2> Results from </h2>
<hr>
<br><br>
<table>

<%
db.connect();


ResultSet rs = db.execSQL("select * from employ");
int i = db.updateSQL("UPDATE employ set fname = 'hello world' where empno='000010'");
out.println(i);



%>

<%
while(rs.next()) {
%>
<%= rs.getString("empno") %>
<BR>
<%
}
%>
<BR>
<%

db.close();

%>

Done

</table>

</body>

</HTML>


The error like this

org.apache.jasper.JasperException: Unable to compile class for JSPNote: sun.tools.javac.Main has been deprecated.
error: Invalid class file format in C:\Program Files\Apache Tomcat 4.0\webapps\muthu\WEB-INF\classes\SQLBean\DbBean.class. The major.minor version '49.0' is too recent for this tool to understand.


An error occurred at line: 7 in the jsp file: /database.jsp

Generated servlet error:
C:\Program Files\Apache Tomcat 4.0\work\localhost\muthu\database$jsp.java:65: Class SQLBean.DbBean not found.
SQLBean.DbBean db = null;
^


An error occurred at line: 7 in the jsp file: /database.jsp

Generated servlet error:
C:\Program Files\Apache Tomcat 4.0\work\localhost\muthu\database$jsp.java:68: Class SQLBean.DbBean not found.
db= (SQLBean.DbBean)
^


An error occurred at line: 7 in the jsp file: /database.jsp

Generated servlet error:
C:\Program Files\Apache Tomcat 4.0\work\localhost\muthu\database$jsp.java:73: Class SQLBean.DbBean not found.
db = (SQLBean.DbBean) java.beans.Beans.instantiate(this.getClass().getClassLoader(), "SQLBean.DbBean");
^
4 errors, 1 warning

Anybody help me?
Thanx in advance
 
Greenhorn
Posts: 21
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
You'll need to put your bean in it's own package, and import it using
<%@page import="mybeanpackage.*"%>

This is so because since JDK.1.4, you can no longer import classes that are
not in a package.

(Actually i am getting this result from http://www.codecomments.com/archive251-2004-4-183596.html for yoursake only)

Try it.
 
reply
    Bookmark Topic Watch Topic
  • New Topic