<!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:['jack'], 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>