帮忙看看下面的javaBean有什么问题?
import java.sql.*;
public class DBconn{
String DBDriver="sun.jdbc.odbc.JdbcOdbcDriver";
String ConnStr="jdbc:odbc:Customers";
Connection conn=null;
ResultSet rs=null;
public DBconn{
try {
Class.forName(DBDriver);
}
catch(java.lang.ClassNotFoundException e){
System.err.println("DBconn():"+e.getMassage());
}
}
public ResultSet executeQuery(String sql){
rs=null;
try{
conn=DriverManager.getConnection(ConStr);
Statement stmt=conn.createStatement();
rs=stmt.executeQuery(sql);
}
catch(SQLException ex){
System.err.print("aq.executeQuery:"+ex.getMessage()):
}
return rs;
}
}