解析json无法正常工作

Question

我是JSON的新手,我使用json_encode创建一个看起来像这样的JSON对象

[{
      "timestamp": "12\/16\/2013 0:00",
      "curr_property": "7211",
      "curr_property_cost": "123",
      "day_property": "48",
      "day_property_cost": "281",
      "curr_solar_generating": "4958",
      "curr_solar_export": "0",
      "day_solar_generated": "33",
      "day_solar_export": "0",
      "curr_chan1": "1964",
      "curr_chan2": "4958",
      "curr_chan3": "289",
      "day_chan1": "13",
      "day_chan2": "33",
      "day_chan3": "1"
  }, {
      "timestamp": "12\/16\/2013 0:00",
      "curr_property": "7179",
      "curr_property_cost": "123",
      "day_property": "72",
      "day_property_cost": "281",
      "curr_solar_generating": "4926",
      "curr_solar_export": "0",
      "day_solar_generated": "49",
      "day_solar_export": "0",
      "curr_chan1": "1980",
      "curr_chan2": "4926",
      "curr_chan3": "273",
      "day_chan1": "19",
      "day_chan2": "49",
      "day_chan3": "2"
  }, {
      "timestamp": "12\/16\/2013 0:00",
      "curr_property": "9627",
      "curr_property_cost": "165",
      "day_property": "104",
      "day_property_cost": "282",
      "curr_solar_generating": "4749",
      "curr_solar_export": "0",
      "day_solar_generated": "65",
      "day_solar_export": "0",
      "curr_chan1": "1980",
      "curr_chan2": "4749",
      "curr_chan3": "2898",
      "day_chan1": "26",
      "day_chan2": "65",
      "day_chan3": "12"
  }, {
      "timestamp": "12\/16\/2013 0:00",
      "curr_property": "9610",
      "curr_property_cost": "165",
      "day_property": "136",
      "day_property_cost": "282",
      "curr_solar_generating": "4781",
      "curr_solar_export": "0",
      "day_solar_generated": "81",
      "day_solar_export": "0",
      "curr_chan1": "1980",
      "curr_chan2": "4781",
      "curr_chan3": "2849",
      "day_chan1": "32",
      "day_chan2": "81",
      "day_chan3": "21"
  }, {
      "timestamp": "12\/16\/2013 0:01",
      "curr_property": "9691",
      "curr_property_cost": "166",
      "day_property": "168",
      "day_property_cost": "283",
      "curr_solar_generating": "4797",
      "curr_solar_export": "0",
      "day_solar_generated": "97",
      "day_solar_export": "0",
      "curr_chan1": "1996",
      "curr_chan2": "4797",
      "curr_chan3": "2898",
      "day_chan1": "39",
      "day_chan2": "97",
      "day_chan3": "31"
  }, {
      "timestamp": "12\/16\/2013 0:01",
      "curr_property": "7034",
      "curr_property_cost": "120",
      "day_property": "191",
      "day_property_cost": "283",
      "curr_solar_generating": "4781",
      "curr_solar_export": "0",
      "day_solar_generated": "113",
      "day_solar_export": "0",
      "curr_chan1": "1980",
      "curr_chan2": "4781",
      "curr_chan3": "273",
      "day_chan1": "46",
      "day_chan2": "113",
      "day_chan3": "32"
}]

我试图使用下面的脚本解析数据

$(document).ready(
        function() {
            var jsonData = JSON.parse("<?php echo $jsondata; ?>");  
            console.log(jsonData.timestamp[0]);             

    });

我不知道我在这里做错了什么.我知道javascript中默认长度为0,所以如何获取值？$ jsondata上的BTW var_dump给出了数据

Answer 1

您的JSON数据包含"字符.您正在尝试将其注入到分隔的JavaScript字符串文字中,"但您没有转义"数据中的字符.

您的JSON还包含新行,JavaScript字符串中不允许使用文字新行,因此您还需要使用转义序列(\n)替换它们.

也就是说,JSON是JavaScript文字语法的一个子集,因此您不需要将JSON文本转换为JavaScript字符串文字,然后解析它,您只需将JSON用作JavaScript:

var data = <?php echo $jsondata; ?>;

你有另一个问题.您的JSON数据表示对象数组,而不是具有数组作为属性值的对象.您需要在属性名称之前访问该数组:data[0].timestamp.