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json格式的基本规则: 1)并列的数据之间用逗号(“,”)分隔 2)映射用冒号(“:”)表示 3)并列数据的集合(数组)用方括号(“[]”)表示 4)映射的集合(对象)用大括号(“{}”)表示
我的理解就是 中括号可套多个大括号,大括号客套多个中括号,逗号做分隔,冒号做映射
demo如下:
var json_array = ["test1","test2"]; //alert(json_array[0]); //json基本格式 var json_array_a={"city":"beijing","street":"dongcheng","postcode":"123456"}; //alert(json_array_a.city); //json嵌套格式 var json_array_b={"name":"wangjinyang","address":{"city":"beijing","street":"dongcheng","postcode":"123456"}}; alert(json_array_b.name+" 所在城市:"+json_array_b.address.city); //json数组格式 var json_array_c= [ {"name":"wangjinyang01","address":{"city":"beijing","street":"dongcheng","postcode":"123456"}}, {"name":"wangjinyang02","address":{"city":"beijing","street":"xicheng","postcode":"123456"}}, ] alert("数组长度:"+json_array_c.length+"/r/n 第一位仁兄:"+json_array_c[0].name+" 所在城市:"+json_array_c[0].address.city);
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>JSON测试</title> </head> <body> <mce:script language="javascript"><!-- //json简单数组 var json_array = ["test1","test2"]; //alert(json_array[0]); //json基本格式 var json_array_a={"city":"beijing","street":"dongcheng","postcode":"123456"}; //alert(json_array_a.city); //json嵌套格式 var json_array_b={"name":"wangjinyang","address":{"city":"beijing","street":"dongcheng","postcode":"123456"}}; alert(json_array_b.name+" 所在城市:"+json_array_b.address.city); //json数组格式 var json_array_c= [ {"name":"wangjinyang01","address":{"city":"beijing","street":"dongcheng","postcode":"123456"}}, {"name":"wangjinyang02","address":{"city":"beijing","street":"xicheng","postcode":"123456"}}, ] alert("数组长度:"+json_array_c.length+"/r/n 第一位仁兄:"+json_array_c[0].name+" 所在城市:"+json_array_c[0].address.city); // --></mce:script> </body> </html>
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