jsp 应用开发详解源代码 电子工业出版社 包含书中个源代码

				package extech.mis;
				
				import java.sql.*;
				
				public class tree {
				String sDBDriver = "sun.jdbc.odbc.JdbcOdbcDriver";
				String sConnStr = "jdbc:odbc:tree";
				Connection conn = null;
				ResultSet rs = null;
				
				public tree() {
				try {
				Class.forName(sDBDriver); 
				}
				catch(java.lang.ClassNotFoundException e) {
				System.err.println(e.getMessage());
				}
				}
				public ResultSet executeQuery(String sql) {
				rs = null;
				try {
				conn = DriverManager.getConnection(sConnStr); 
				Statement stmt = conn.createStatement();
				rs = stmt.executeQuery(sql);
				} 
				catch(SQLException ex) { 
				System.err.println(ex.getMessage());
				}
				return rs;
				}
				}