Question

我试图从mysql表中获取数据并在Javascript中处理这些数据。我在php的家里和javascript有许多不同之处:(而我的问题是我在php中认为需要了解javascript：）

好的继承人问题：我从我的PHP脚本中获取了以这种格式表格中的数据：使用

while($Search=mysql_fetch_assoc($abfrage)){
  $data[] = $Search;
 }

 echo json_encode( $data );

并获取此数据：

Array ( [0] => Array ( [id] => 1 [date] => 2017-12-01 [time] => 00:00:00  [active] => 1 ) [1] => Array ( [id] => 2 [date] => 2017-12-02 [time] => 00:00:00 [active] => 1 ) [2] => Array ( [id] => 3 [date] => 2017-12-08 [time] => 00:00:00 [active] => 1 ) [3] => Array ( [id] => 4 [date] => 2017-12-09 [time] => 00:00:00 [active] => 1 ) [4] => Array ( [id] => 5 [date] => 2017-12-15 [time] => 00:00:00 [active] => 1 ) [5] => Array ( [id] => 6 [date] => 2017-12-16 [time] => 00:00:00 [active] => 1 ) [6] => Array ( [id] => 7 [date] => 2017-12-22 [time] => 20:00:00 [active] => 1 ) )

所以我用javascript来获取数组或对象或其他任何东西。我真的不太了解对象 - 。

var myArr = JSON.parse

从这些数据中获取数组：

[[object Object] {
   active: "1",
   date: "2017-12-01",
   id: "1",
  time: "00:00:00"
}]

这是什么 [[对象] 意思是这是一个数组或一个对象，我该如何使用它？

我的目标是查看数据中是否有来自数据库的日期，如果是，请检查是否还有一个时间设置为此日期。

我在jsbin做了一个测试示例，但我不知道如何继续接收我想要的数据： http://jsbin.com/wariparoce/edit?html,js,console,output

感谢你所有的时间和耐心：）

甜菊

Answer 1

尝试访问

public final class PointFactory {

    // private classes
    private class PointImpl implements Point {

        private int x;
        private int y;

        private PointImpl(int x, int y) {
            this.x = x;
            this.y = y;
        }

        public int x() {
            return x;
        }

        public int y() {
            return y;
        }
    }

    private class PointOrigoImpl implements Point {

        public int x() {
            return 0;
        }

        public int y() {
            return 0;
        }
    }

    // end private classes

    public Point of(int x, int y) {
        if (x == 0 && y == 0) {
            return new PointOrigoImpl();
        }
        return new PointImpl(x, y);
    }

}

这应该返回字段active，date ,,

的idenx 0中的元素

这意味着您获得了一个数组（基于0索引）的对象，其结构类似于PHP关联数组..其中PHP中的键是JSOn中的键名称）

Answer 2

也许这会有所帮助。解码JSON字符串后，您有一个数组myArr。只需直接访问这些项目：

var myArr = JSON.parse('[
    {"id":"1","date":"2017-12-01","time":"00:00:00","active":"1"},
    {"id":"2","date":"2017-12-02","time":"00:00:00","active":"1"},
    {"id":"3","date":"2017-12-08","time":"00:00:00","active":"1"},
    {"id":"4","date":"2017-12-09","time":"00:00:00","active":"1"},
    {"id":"5","date":"2017-12-15","time":"00:00:00","active":"1"},
    {"id":"6","date":"2017-12-16","time":"00:00:00","active":"1"},
    {"id":"7","date":"2017-12-22","time":"20:00:00","active":"1"}
]');

var gew_datum="2017-12-08";

for(var i = 0;i < myArr.length;i++) {
  if(gew_datum == myArr[i]['date']){
    console.log(i + ") date: " + myArr[i]["date"] + ", time: " + myArr[i]["time"] + ", active: " + myArr[i]["active"]);
  }
}

Answer 3

非常感谢你做了这个伎俩 - 我在“结果”（你可以在jsbin上看到）的事情中跑来跑去，我后来创建的是为了找出给定的日期是否在数组中 - 并且我没有得到结果[0] ['时间']我预期的数据...... 非常感谢您对双方的快速和完美的帮助！

javascript多维数组出mysql表 - 不知道那是什么样的Object Object

3 个答案: