byte[]插入到MySQL数据库

//对象里面封装了byte[],把byte[]通过sql语句存入到MySQL数据库中
/**
	 * 插入一个对象到数据库中
	 */
	public boolean getInsertRSAAES(KeyBean kb) {
		boolean flag = false;
		//String sql = "INSERT INTO `t_key` (`sn`,`rsapublic`,`rsaprivate`,`aes`,`createtime`) VALUES ('"+kb.getSn()+"','@rsapublic','@rsaprivate','@aes','"+kb.getCreatetime()+"')";
		try {
			String sql = "INSERT INTO `t_key` (`sn`,`rsapublic`,`rsaprivate`,`aes`,`createtime`) VALUES (?,?,?,?,?)";
			ps = conn.prepareStatement(sql);
			ps.setString(1, kb.getSn());
			ps.setBytes(2, kb.getRsapublic());
			ps.setBytes(3, kb.getRsaprivate());
			ps.setBytes(4, kb.getAes());
			ps.setString(5, kb.getCreatetime());
			int i = ps.executeUpdate();
			if(i==1){
				flag = true;
			}
			return flag;
		} catch (SQLException e) {
			System.out.println("执行SQL发生异常...");
			e.printStackTrace();
		}
		return flag;
	}