spring JdbcTemplate批量插入以及单个插入时获取id

1. 批量更新插入

jdbcTemplate.batchUpdate(String sql, List<Object[]> batchArgs)

Object[]数组的长度为每条记录的参数个数(也就是sql语句中”?”的个数)

List: 总共插入多少条记录。

/**
 * 批量插入订单详情
 *
 */
public void addBatch(List<OrderDetail> orderDetails) {
    List<Object[]> params = new ArrayList<>();
    for(OrderDetail orderDetail : orderDetails) {
        params.add(new Object[]{orderDetail.getProductName(), orderDetail.getProductPrice(),
                orderDetail.getProductCount(), orderDetail.getParentid()});
    }
    final String sql = "insert into order_detail(pro_name,pro_price,pro_count,parent_id) values(?,?,?,?)";
    jdbcTemplate.batchUpdate(sql, params);}

2. 单条记录插入获取主键id

/**
 *  插入并获取主键
 */
public int addAndGetId(Order order) {
    final String sql = "insert into orders(name, address,createtime,totalprice,status) values(?,?,?,?,?)";
    KeyHolder keyHolder = new GeneratedKeyHolder();
    jdbcTemplate.update(new PreparedStatementCreator() {
        @Override
        public PreparedStatement createPreparedStatement(Connection connection) throws SQLException {
            PreparedStatement ps  = connection.prepareStatement(sql, Statement.RETURN_GENERATED_KEYS);
            ps.setObject(1, order.getName());
            ps.setObject(2, order.getAddress());
            ps.setObject(3, order.getCreateTime());
            ps.setObject(4, order.getTotalPrice());
            ps.setObject(5, order.getStatus());
            return ps;
        }
    }, keyHolder);
    return keyHolder.getKey().intValue();
}