js遍历json的key和value的实例

<script>var json = [{dd:'SB',AA:'东东',re1:123},{cccc:'dd',lk:'1qw'}];for(var i=0,l=json.length;i<l;i++){for(var key in json[i]){alert(key+':'+json[i][key]);}}</script>

packJson = [{"name":"nikita", "password":"1111"},{"name":"tony", "password":"2222"}];for(var p in packJson){//遍历json数组时，这么写p为索引，0,1 alert(packJson[p].name + " " + packJson[p].password);}

for(var i = 0; i < packJson.length; i++){ alert(packJson[i].name + " " + packJson[i].password);}

myJson = {"name":"caibaojian", "password":"1111"};for(var p in myJson){//遍历json对象的每个key/value对,p为key alert(p + " " + myJson[p]);}

for(var p in obj){str = str+obj[p]+',';return str;}