json 数据格式简单解析

1，json 数据格式

   后台程序返回字符串

  { ’message': 'Hello word'}

    前台这样解析

    var Dictionary=eval("(" + data + ")");

  后台程序返回字符串

    ({ 'message': 'Hello word'})

    前台这样解析

    var Dictionary=eval( data);

   $.ajax({
    url: "GetJosnString",
    type: "post",
        datatype:"json",
        success: function(data) {
        var msg = eval(data);
        alert(msg.message); //输出结果 Hello word
        }
    });

2.each 循环对象json

  后台定义字符串

({ 'message': 'Hello word','Msg': 'Hello word'})



( {'items':[{ 'message': 'Hello word','Msg': 'Hello word'}]})



$.ajax({
        url: "GetJosneach",
        type: "post",
        datatype: "json",
        success: function(data) {
        var datas = eval(data);   

/***********第一中读取字典类型***************
$.each(datas , function(key, value) {
               alert(key + ":" + value); //message:Hello word

            });

*************************/

       //第二中解析字符串的方法

        $.each(datas .items, function(key, value) {
               alert(key + ":" + value.Msg); //0：Hello word   数值中第一个元素和value
            });
        }
    });

以上也随便介绍下jquery each 对象大家有兴趣可以自己找找了，这里只下是简单用了






grep
<script type='text/javascript' src="/jquery.js"></script>
<script type="text/javascript">
$().ready(
function(){
var array = [1,2,3,4,5,6,7,8,9];
var filterarray = $.grep(array,function(value){
return value > 5;//筛选出大于5的
});
for(var i=0;i<filterarray.length;i++){
alert(filterarray[i]);
}
for (key in filterarray){
alert(filterarray[key]);
}
}
);
</script>

each
<script type='text/javascript' src="/jquery.js"></script>
<script type="text/javascript">
$().ready(
function(){
var anObject = {one:1,two:2,three:3};//对json数组each
$.each(anObject,function(name,value) {
alert(name);
alert(value);
});
var anArray = ['one','two','three'];
$.each(anArray,function(n,value){
alert(n);
alert(value);
}
);
}
);
</script>

inArray
<script type='text/javascript' src="/jquery.js"></script>
<script type="text/javascript">
$().ready(
function(){
var anArray = ['one','two','three'];
var index = $.inArray('two',anArray);
alert(index);//返回该值在数组中的键值，返回1
alert(anArray[index]);//value is two
}
);
</script>

map
<script type='text/javascript' src="/jquery.js"></script>
<script type="text/javascript">
$().ready(
function(){
var strings = ['0','1','2','3','4','S','6'];
var values = $.map(strings,function(value){
var result = new Number(value);
return isNaN(result) ? null:result;//isNaN:is Not a Number的缩写
}
);
for (key in values) {
alert(values[key]);
}
}
);
</script>

遍历json对象：
<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>

遍历json对象
有如下 json对象：
var obj ={”name”:”冯娟”,”password”:”123456″,”department”:”技术部”,”sex”:” 女”,”old”:30};
遍历方法：
for(var p in obj){
str = str+obj[p]+’,';
return str;
}