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error due to accessing database connection using jsp
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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
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
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Originally Posted by muthumari
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.
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