JS解析JSON数据及取值的用法

1、JS解析JSON数据及取值的一些用法 时间： 2012-12-20 JS解析JSON数据 JS解析JSON数据测试界面/将JSON字符串转换为JSON对象的一些方法/将JSON字符串转换为JSON对象的一些用法(function () var str = name:张三,age:20;/JSON对象 alert();alert(str.age);/直接取JSON对象的值/将JSON字符串转换为JSON对象var str = name:张三,age:21;/JSON字符串 转义不用系统/和dos一致用 var obj = eval( + str + );/使用eval函数将JSO

2、N字符串转换为JSON对象 alert();alert(obj.age);var str = name:张三,age:22;/JSON字符串 var obj = (new Function(return + str)(); /使用new Function()形式将JSON字符串转换为JSON对象 alert();alert(obj.age);/将JSON对象转换为JSON字符串/var straa = name:李四,age:20;/JSON对象/var newJSONtext = straa.toJSONString();/貌似没有原生方法 /alert(JS

3、ON对象转换为JSON字符串:+newJSONtext);)();/(function ()();自动执行匿名函数/取值的一些用法/取值的一些用法function showJSON() /效果一 var user = username:andy, age:20, info: tel: , cellphone: 98765, address: city:beijing,postcode:, city:newyork,postcode: alert(user.username); alert(user.age); alert(.cellphone); alert(user.add

4、ress0.city); alert(user.address0.postcode); user.username = Tom; alert(user.username); /效果二 var people = programmers: firstName: Brett, lastName:McLaughlin, email: brettnewI , firstName: Jason, lastName:Hunter, email: , firstName: Elliotte, lastName:Harold, email: elharo

5、 , authors: firstName: Isaac, lastName: Asimov, genre: science fiction , firstName: Tad, lastName: Williams, genre: fantasy , firstName: Frank, lastName: Peretti, genre: christian fiction , musicians: firstName: Eric, lastName: Clapton, instrument: guitar , firstName: Sergei, lastName: Rac

6、hmaninoff, instrument: piano alert(grammers0.firstName+ +grammers0.email); alert(grammers2.firstName+ +grammers2.email); alert(people.authors0.firstName+ +people.authors0.genre); alert(people.musicians1.firstName+ +people.musicians1.instrument); showJSON();function mm()var str = ;for (mm in wi