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JSON serialization operation implemented by JS

不言Original: 2018-07-03 15:33:471721browse

This article mainly introduces the JSON serialization operation implemented by JS. It analyzes the related implementation methods and related precautions of the json serialization operation in the form of simple examples. The code is equipped with more detailed comments for easy understanding. Friends in need can refer to it. Next

The example in this article describes the JSON serialization operation implemented by JS. Share it with everyone for your reference, the details are as follows:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>JOSN对象</title>
  <script>
    var book={
      title:"php 最佳实践",
      authors:[&#39;jack&#39;],
      edition:3,
      year:2017
    };
    //JSON.stringify()有三个参数分别是json对象，过滤器（可以是数组or函数），是否在josn字符串中保留缩进（这个参数意义不大可忽略）
    var jsonText=JSON.stringify(book);
    var jsonText1=JSON.stringify(book,["title","year"]);
    var jsonText2=JSON.stringify(book,function (key,value) {
      switch (key){
        case "title":
          return "java 从入门到精通";
        case "year":
          return 2018;
        case "edition":
          return undefined;
        default:
          return value;
      }
    });
    console.log(jsonText);//{"title":"php 最佳实践","authors":["jack"],"edition":3,"year":2017}
    console.log(jsonText1);//{"title":"php 最佳实践","year":2017}
    console.log(jsonText2);//{"title":"java 从入门到精通","authors":["jack"],"year":2018}
    //JSON.parse(arg1,arg2) 可以接受2个参数一个是json字符串，一个是过滤函数
    var jsonObject=JSON.parse(jsonText);
    var jsonObject1=JSON.parse(jsonText,function(key,value){
      if(key==="year"){
        return 2019
      }else if(key==="title"){
        return "javascript 从入门到精通";
      }else{
        return value;
      }
    });
    console.log(jsonObject);//Object {title: "php 最佳实践", authors: Array(1), edition: 3, year: 2017}
    console.log(jsonObject1);//Object {title: "javascript 从入门到精通", authors: Array(1), edition: 3, year: 2019}
  </script>
</head>
<body>
</body>
</html>

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