Question

所以我有一些带有JSON的问题。

setupdata({"NON-RELIGOUS ORGANIZATIONS":{"23":["NON-RELIGOUS ORGANIZATIONS","Does this Loce test 2","",null]},"YARD SALES":{"1":["YARD SALES","yard sale","1332599400",null],"22":["YARD SALES","LOCKING TEST YARD SALE a change and more","1331814600",null],"21":["YARD SALES","Generic Yard Sale Title","",null]}})

我正在处理....

function setupdata(data){

   alert(data.length);
   for(i=0; i<data.length; i++) {
   newdiv = document.createElement("DIV");
   newdiv.setAttribute("id","cat"+i);
   newdiv.innerHTML(\'test\');
   document.getElementById(\'divmiddle\').appendChild(newdiv);
   }
 }

我正在为data.length获取UNDEFINED，并且i循环未运行，因为它未定义。我想我对如何解析从JSON调用返回的数据感到困惑。任何帮助适用。

和获胜的答案

用PHP创建数组：

while($getcats = mysqli_fetch_array($query)){
$layout[$getcats[news_cat_name]];
if(!$getstories = mysqli_query($connection,"SELECT news_id,news_title,news_organization,news_expiration from news_items where news_category='$getcats[news_cat_id]'")){ echo mysqli_error($connection);}
while($looptitles=mysqli_fetch_array($getstories)){

$layout[$getcats[news_cat_name]][$looptitles[news_id]][]=date("m/d/y G:i a",$looptitles[news_expiration]);

 $layout[$getcats[news_cat_name]][$looptitles[news_id]][]=$looptitles[news_title];

$layout[$getcats[news_cat_name]][$looptitles[news_id]][]=$looptitles[news_organization];

}
}

和结果JSON

setupdata({"NON-RELIGOUS ORGANIZATIONS":{"23":[false,"Does this Loce test 2","2"]},
"YARD SALES":{
     "1":["03\/24\/12 10:30 am","yard sale","0"]
     ,"22":["03\/15\/12 8:30 am","LOCKING TEST YARD SALE a change and more","0"],
     "21":[false,"Generic Yard Sale Title","0"]}})

和JS分享JSON

for(var key in data){//OUTER LOOP FOR THE MAIN OBJECTS
  divkey = document.createElement("DIV");
  divkey.setAttribute("id",key);
  divkey.style.fontSize = \'13px\';

  divkey.style.textDecoration = \'underline\';
  divkey.style.paddingTop = \'3px\';
  divkey.style.paddingBottom = \'5px\';
  divkey.style.position = \'relative\';
  divkey.innerHTML = key;
      document.getElementById(\'divmiddle\').appendChild(divkey);

  for(var mykey in data[key]){//INNER LOOP FOR THE INNER OBJECTS
         divkey = document.createElement("DIV");
     divkey.setAttribute("id",mykey);
         divkey.style.fontFamily = \'Verdana\';
         divkey.style.fontSize = \'11px\';
     divkey.style.paddingBottom = \'5px\';

     divkey.style.position = \'relative\';
     divkey.innerHTML = +data[key][mykey][1]+\' -- \' + data[key][mykey][0];
         document.getElementById(\'divmiddle\').appendChild(divkey);
   }
  }
 }

**我希望这可以帮助有完整解决方案的人，因为到处都有部分帖子。**

Answer 1

基本上{}是Object而不是Array所以它没有length属性。

但你可以用

循环它

for (var key in data) {
    // your code ....
}

编辑：回答您的评论

您只需使用此风格

即可使用Object

 {'data': { /* your json data */ }} // when there's data 
 {'data': null}                     // when no data available

然后在你的功能中。

if (data.data) {
    for(var key in data.data) {
        // your code
    }
}

Answer 2

setupdata({ "NON-RELIGOUS ORGANIZATIONS": { "23": ["NON-RELIGOUS ORGANIZATIONS", "Does this Loce test 2", "", null] }, "YARD SALES": { "1": ["YARD SALES", "yard sale", "1332599400", null], "22": ["YARD SALES", "LOCKING TEST YARD SALE a change and more", "1331814600", null], "21": ["YARD SALES", "Generic Yard Sale Title", "", null]} });
   function setupdata(data) {
       alert(JSON.stringify(data));
       alert(data.length);
       for (var key in data) {
           alert(JSON.stringify(data[key]['23']));
           newdiv = document.createElement("DIV");
           newdiv.setAttribute("id", "cat" + data[key]['23']);
           newdiv.innerHTML = 'test';
           document.getElementById('divmiddle').appendChild(newdiv);
       }
   }

我有一个JSON响应但无法解析它。需要帮助。没有JQUERY没有原型。只是Javascript

2 个答案: