js 解析 JSON 数据简单示例

本文实例讲述了js 解析 JSON 数据。分享给大家供大家参考，具体如下：

JSON 数据如下：

{
  "name": "mkyong",
  "age": 30,
  "address": {
    "streetAddress": "88 8nd Street",
    "city": "New York"
  },
  "phoneNumber": [
    {
      "type": "home",
      "number": "111 111-1111"
    },
    {
      "type": "fax",
      "number": "222 222-2222"
    }
  ]
}

要在JavaScript中访问JSON对象，使用 JSON.parse() 解析它，并通过“.”或“[]”访问。

JS 代码如下：

<script>
    var data = '{"name": "mkyong","age": 30,"address": {"streetAddress": "88 8nd Street","city": "New York"},"phoneNumber": [{"type": "home","number": "111 111-1111"},{"type": "fax","number": "222 222-2222"}]}';

  var json = JSON.parse(data);
      
  console.log(json["name"]); //mkyong
  console.log(json.name); //mkyong
  
  console.log(json.address.streetAddress); //88 8nd Street
  console.log(json["address"].city); //New York
      
  console.log(json.phoneNumber[0].number); //111 111-1111
  console.log(json.phoneNumber[1].type); //fax
      
  console.log(json.phoneNumber.number); //undefined
</script>

运行结果：

感兴趣的朋友可以使用在线HTML/CSS/JavaScript代码运行工具：http://tools.3water.com/code/HtmlJsRun测试上述代码运行效果。