database.java

JSP+JAVABEAN对数据表操作,对初学者来说相当好用的例子

package Db; 


import java.sql.*;
public class DataBase{
//String sDBDriver = "oracle.jdbc.driver.OracleDriver";
String sDBDriver = "sun.jdbc.odbc.JdbcOdbcDriver";
String url = "jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ=D:/bjhsoft/Tomcat 5.0/webapps/new/db/db.mdb;";
//String url="jdbc:oracle:thin:@127.0.0.1:1521:orcl";
String username="cmstar";
String password="cmstar";
Connection conn= null;
ResultSet rs = null;


public DataBase(){
try
{
Class.forName(sDBDriver);
}
catch(java.lang.ClassNotFoundException e)
{
     System.err.println("DataBase();"+e.getMessage());
}
}
//执行查询语句
public ResultSet executeQuery(String sql)
{
     rs = null;
     try
{
   conn = DriverManager.getConnection(url, username, password);
   Statement stmt = conn.createStatement();
   rs=stmt.executeQuery(sql);
}
     catch(SQLException ex)
{
    System.err.println("DataBase.executeQuery:"+ex.getMessage());
}
return rs;
}
//执行插入及更新语句
public void executeInsert(String sql)
{
    try
{
    	conn = DriverManager.getConnection(url, username, password);
   Statement stmt = conn.createStatement();
   stmt.executeUpdate(sql);
}
catch(SQLException ex)
{
   System.err.println("DataBase.executeUpdate"+ex.getMessage());
}

}
//执行删除操作
public void executeDelete(String sql)
{
    try
{
    	conn = DriverManager.getConnection(url, username, password);
   Statement stmt=conn.createStatement();
   stmt.executeUpdate(sql);
}
catch(SQLException ex)
{
   System.err.println("DataBese.executeDelete:"+ex.getMessage());
    }
}

}