package ms;

//数据库的连接
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class DataBaseConnection {
	
	Connection con = null;
	Statement sql = null;
	ResultSet rs = null;

	public DataBaseConnection() {

		// shujuku
		try {
			Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); // 加载驱动
		} catch (ClassNotFoundException e) {
			System.out.println(e);
		}
		try {
			con = DriverManager.getConnection("jdbc:sqlserver://localhost:1433;DatabaseName=大学城校园美食联盟", "sa", "lch"); // 连接数据库

		} catch (SQLException e) {
			System.out.println(e);
		}
	}

	// 查询
	public ResultSet executeQuery(String sql_s) {
		try {
			sql = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,
					ResultSet.CONCUR_READ_ONLY);
			rs = sql.executeQuery(sql_s);
		} catch (SQLException e) {
			System.out.println(e);
		}
		return rs;
	}


	// 关闭数据库
	public void close() {
		if (rs != null) {
			try {
				rs.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		if (con != null) {
			try {
				con.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}

	}

}