我在模拟实现批处理时出现此问题代码如下：

public static int batch(Connection connection, String sql, Object[][] params) {
        try(Connection conn = connection){
            PreparedStatement pstat = conn.prepareStatement(sql);
            for (int i = 0; i < params.length; i++) {
                for (int j = 0; j < params[i].length; j++) {
                    pstat.setObject(j + 1, params[i][j]);
                    //错误
                    pstat.executeUpdate();
                }
               //正确
               pstat.executeUpdate();
            }
        } catch(SQLException e) {
            e.printStackTrace();
        }
        return 0;
    }