public  boolean insertUS(US user){
		Boolean isInsert=null;
		connectionDB();
		String sql="insert into US values(user_seq.nextVal,?,?,?,?,?,?,?)";
		try {
			ps=conn.prepareStatement(sql);
			ps.setString(1, user.getUserName());
			ps.setString(2, user.getSex());
			ps.setInt(3, user.getAge());
			ps.setString(4, user.getTelphone());
			ps.setString(5,user.getAddress());
			ps.setString(6, user.getAddress());
			ps.setString(6,user.getPower());
			ps.setString(7, user.getPassWord());
			int rows=ps.executeUpdate();
			isInsert=rows>0?true:false;
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			closeDB();
		}
		return isInsert;
	}