JSON

JSON全称JavaScript Object Notation(JavaScript 对象表示法)，JSON语法可以有三种类型的值，分别是简单值（字符，数字，布尔值和null），对象和数组。

JSON解析与序列化

JSON对象的两个方法：

stringify():把JavaScript对象序列化为JSON字符串。

parse()：把JSON字符串解析为原生JavaScript值

var book = { "title": "Professional JavaScript", "authors": [ "Nicholas C. Zakas" ], edition: 3, year: 2011 }; var jsonText = JSON.stringify(book); alert(jsonText);//结果：{"title":"Professional JavaScript","authors":["Nicholas C. Zakas"],"edition":3,"year":2011} var bookCopy = JSON.parse(jsonText); alert(bookCopy.title);//结果：Professional JavaScript

JSON.stringify()除了JavaScript对象外，还可以接受第二个参数，可以是数组或者函数

var book = { title: "Professional JavaScript", authors: [ "Nicholas C. Zakas" ], edition: 3, year: 2011 }; var jsonText = JSON.stringify(book, ["title", "edition"]);//参数：数组，起过滤作用 alert(jsonText); var book = { title: "Professional JavaScript", authors: [ "Nicholas C. Zakas" ], edition: 3, year: 2011 }; var jsonText = JSON.stringify(book, function(key, value){//参数：函数，将在每个键值对上调用 switch(key){ case "authors": return value.join(",") case "year": return 5000; case "edition": return undefined; default: return value; } }); alert(jsonText);

JSON.parse()方法接收一个参数，该参数是一个函数，将在每个键值对上调用

var book = { "title": "Professional JavaScript", "authors": [ "Nicholas C. Zakas" ], edition: 3, year: 2011, releaseDate: new Date(2011, 11, 1) }; var jsonText = JSON.stringify(book); alert(jsonText); var bookCopy = JSON.parse(jsonText, function(key, value){ if (key == "releaseDate"){ return undefined; } else { return value; } }); alert("releaseDate" in bookCopy);

转载于:https://www.cnblogs.com/YeChing/p/6343888.html

相关资源：net.sf.json jar包 最全版