package?db;
import?java.sql.*;
public?class?db?{
	private?String?dbDriver=“com.microsoft.jdbc.sqlserver.SQLServerDriver“;

	?private?String?sConnStr?=?“jdbc:microsoft:sqlserver://localhost:1433;databasename=liuyou“;?
	??public?Connection?connect?=?null;
	??public?ResultSet?rs=null;
	??public?db（）?{
	????try?{
	?????
	??????Class.forName（dbDriver）.newInstance（）;?
	?????
	??????connect?=?DriverManager.getConnection（sConnStr“sa““123456“）;?
	?????
	????}
	????catch?（Exception?ex）?{
	??????System.out.println（“12121“）;
	????}
	??}
	
	??
	??public?ResultSet?executeQuery（String?sql）?{
			try{
				connect=DriverManager.getConnection（sConnStr“sa““123456“）;
				Statement?stmt=connect.createStatement（）;
				rs=stmt.executeQuery（sql）;
			}catch（SQLException?ex）{
				System.err.println（ex.getMessage（））;
			}
			return?rs;
		}
	??public?void?executeUpdate（String?sql）
	????{
	????	
	????	Statement?stmt=null;
	????	rs=null;
	????	try
	????	{???connect=DriverManager.getConnection（sConnStr“sa““123456“）;
	????		stmt=connect.createStatement（）;
	????		stmt.executeUpdate（sql）;
	????		stmt.close（）;
	????		connect.close（）;
	????		
	????	
	????	}
	????	catch（SQLException?ex）
	????	{
	????		System.err.println（ex.getMessage（））;
	????		
	????		
	????	}
	????
	????	
	????}
}