java，

java，

package DAO;
	import java.sql.*;
	public class DBConnection {
	//数据库的url
	private  static String url ="jdbc:sqlserver://localhost:1433;databasename =jdbc_demo";
	private  static String userName = "sa";//数据库用户名
	private  static String password = "123456";//数据库密码
	//jdbc驱动器名称
	private  static String driverName = "com.microsoft.sqlserver. 	jdbc.SQLServerDriver";	
	static {
		try {
			Class.forName(driverName);//加载JDBC驱动器
			} catch (Exception ex) {
				ex.printStackTrace();
				}
		}
	public static Connection getConn() {
		try {
			Connection conn = DriverManager
			getConnection(url,userName, password);
			System.out.println("连接数据库成功");
			return conn;
		} catch (SQLException ex) {
			System.out.println("连接数据库失败");
			ex.printStackTrace();
			return null;
			}
		}
	public static void close(Connection conn, Statement stm ResultSet 	rs) {
		try{
			if (rs != null)
				 rs.close();
			if(stm!=null) 
				stm.close();
			if (conn != null){
				conn.close();
				System.out.println("数据库连接成功释放");
				}
			} catch (SQLException ex) {}
		}
	}