url上获取json对象问题

Question

HTMLPage4.htm?_pageinfo={"_mailid":"INBOX","_num":1,"_pagesize":10,"_sortname":"mail_time","sortvalue":"desc"}
获取了 url的参数后 为什么无法把这个json串转化为对象呢》？获取_pageinfo值 后 eval也无法转化为对象问 如何把这个url值转化为json对象

Answer 1

s = '{"_mailid":"INBOX","_num":1,"_pagesize":10,"_sortname":"mail_time","sortvalue":"desc"}'
s = eval('('+s+')')
alert(s._mailid)

Answer 2

<script>
var url = '{"_mailid":"INBOX","_num":1,"_pagesize":10,"_sortname":"mail_time","sortvalue":"desc"}';
var jsonObj = eval("(" + url + ")");
var s = "";
for(var k in jsonObj) {
s += "jsonObj[" + k + "]=" + jsonObj[k] + "\n";
}
alert(s);
</script>

Answer 3

eval() 转化为对象首先你的字符串要是对象格式的
var str='{"id":1,"name":"zjp"}'
str = eval('('+s+')');

Answer 4

str = '{"_mailid":"INBOX","_num":1,"_pagesize":10,"_sortname":"mail_time","sortvalue":"desc"}'
str = eval('('+str+')')
str2 = eval('['+str+']')
alert(str2[0]._mailid)