Json数据常见写法

 

<script>

//var a={'id':'2','name':'abc'};
//alert(a.name);

//var str="{'id':'2','name':'abc'}"; 
//var str_obj=eval("("+str+")");; 
//alert(str_obj.id);


//var str="{'id':'2','name':['abc','def','hgi']}"; 
//var str_obj=eval("("+str+")");; 
//alert(str_obj.name[1]);

//var str="{'id':'2','name':['abc','def','hgi']}"; 
//var str_obj=eval("("+str+")");; 
//alert(str_obj.name[1]);

//var a={'userlist':[{'id':'1','name':'a'},{'id':'2','name':'b'}]};
//alert(a.userlist[1].name);


//var a={'userlist':[{'id':'1','name':'a'},{'id':'2','name':'b'}],'maillist':[{'id':'1','name':'163.com'},{'id':'2','name':'126.com'}]};
alert(a.maillist[1].name);
alert(a.length); //错误的写法
</script>