正在筛选JSON数据
Filtering JSON data
我有一个JSON文件，其中包含如下数据：
{"posts": [
{ "title":"1", "url":"n1.png" },
{ "title":"2", "url":"n2.png" },
{ "title":"3", "url":"n3.png" },
{ "title":"4", "url":"n4.png" },
{ "title":"5", "url":"n5.png" },
{ "title":"6", "url":"n6.png" },
{ "title":"7", "url":"n7.png" },
{ "title":"8", "url":"n8.png" },
{ "title":"9", "url":"n9.png" },
{ "title":"10", "url":"n10.png" }
]}
我需要用两个文本框按范围筛选title：from和to。
为什么不这样做？
var json = JSON.parse('{"posts": [
{ "title":"1", "url":"n1.png" },
{ "title":"2", "url":"n2.png" },
{ "title":"3", "url":"n3.png" },
{ "title":"4", "url":"n4.png" },
{ "title":"5", "url":"n5.png" },
{ "title":"6", "url":"n6.png" },
{ "title":"7", "url":"n7.png" },
{ "title":"8", "url":"n8.png" },
{ "title":"9", "url":"n9.png" },
{ "title":"10", "url":"n10.png" }
]}');
var filteredJson = json.posts.filter(function (row) {
if(row.title matches your criteria) {
return true
} else {
return false;
}
});
是的，这是一种ES5方法，但可以很好地填充
我在当前项目中使用了LinqJS，它在过滤数据方面非常有效。
http://jslinq.codeplex.com/
var posts = [
{ "title":"1", "url":"n1.png" },
{ "title":"2", "url":"n2.png" },
{ "title":"3", "url":"n3.png" },
{ "title":"4", "url":"n4.png" },
{ "title":"5", "url":"n5.png" },
{ "title":"6", "url":"n6.png" },
{ "title":"7", "url":"n7.png" },
{ "title":"8", "url":"n8.png" },
{ "title":"9", "url":"n9.png" },
{ "title":"10", "url":"n10.png" }
];
var filteredPost = JSLINQ(posts)
.Where(function(item){ return item.title >= "textBox1Value" && item.title <= "textBox2Value"; });
还有另一种解决方案：使用jLinq.js（文档），它有更多的功能。在这种情况下，您可以使用以下代码获得解决方案：
var selectedPosts = jLinq.from(posts)
.betweenEquals("title",4,8)
.select();
尝试这个
var q = new RegExp(req.query.q,'i');
posts = posts.filter(function(item){
if(item.title.match(q) || item.url.match(q)){
return item;
}
});
将json读取到对象中/ar jquery的parseJson函数(http://api.jquery.com/jQuery.parseJSON/)和尝试使用拼接函数拼接数组（）只需复制对象并拼接该对象。
我有一个JSON数组，里面装满了项目，每个项目都属于一个产品：
[
{
"id": 1,
"parentProduct": {
"id": 12,
"productName": "Test 123"
},
"phase": "Phase 4",
"productNumber": "111223",
"projectName": "Test JPEG Apple",
"supplier1": "de",
},
{
"id": 2,
"parentProduct": {
"id": 12,
"productName": "Test from me"
},
"phase": "222",
"productNumber": "11122",
"projectName": "Test PNG",
"supplier1": "222"
}
]
我只想得到那些有特定父id的人，我按如下方式做了：
filterByProductId(projects, productId) : any[] {
var filteredArray = new Array;
for(var k in projects) {
if(projects[k].parentProduct.id == productId) {
filteredArray.push(projects[k]);
}
}
return filteredArray;
}
json data array of objects filter
<html>
<head>
<script type="text/javascript">
/*
var ss = JOSN.stringify(obj,function(key,value){ //serialization
if(key=='a'){
return undefined;
}else{
return value;
}
});
*/
var jsonStr = [
{
"name": "Bang Bang",
"outline": "A chance encounter with a mysterious charmer leads to a bank employee's wild adventure.",
"rating": 5.6,
"director": "Siddharth Anand",
"id": 250
},
{
"name": "Bang Bang",
"outline": "A chance encounter with a mysterious charmer leads to a bank employee's wild adventure.",
"rating": 5.6,
"director": "Siddharth Anand",
"id": 250
},
{
"name": "Bang Bang",
"outline": "A chance encounter with a mysterious charmer leads to a bank employee's wild adventure.",
"rating": 5.6,
"director": "Siddharth Anand",
"id": 250
},
{
"name": "Indian",
"outline": "After his daughter's tragic death, a freedom fighter steps up his war against corruption.",
"rating": 8.4,
"director": "Shankar",
"id": 251
},
{
"name": "Dilwale Dulhania Le Jayenge",
"outline": "Raj and Simran meet on a trip to Europe. After some initial misadventures, they fall in love. The battle begins to win over two traditional families.",
"rating": 8.4,
"director": "Aditya Chopra",
"id": 253
}
];
var jsonobj = jsonStr;
function filterMovieDirectorData(movie,director){
if(movie!='' && (director!='' && director!='Director')){
var data = jsonobj.filter(function(item){
return (item["name"].toLowerCase().indexOf(movie.toLowerCase())!=-1 && item["director"].toLowerCase().indexOf(director.toLowerCase())!=-1)
});
}else if(movie!='' && director=='Director'){
var data = jsonobj.filter(function(item){
return item["name"].toLowerCase().indexOf(movie.toLowerCase())!=-1
});
}else if(movie=='' && (director!='' && director!='Director')){
var data = jsonobj.filter(function(item){
return item["director"].toLowerCase().indexOf(director.toLowerCase())!=-1
});
}
return data;
}
function getFilterDirectorJson(){
var inputStr = document.getElementById("movie").value;
var e = document.getElementById("director");
var directorStr = e.options[e.selectedIndex].text;
if( (inputStr=='' || inputStr=='Enter movie name') && (directorStr=='' || directorStr=='Director') ){
alert("Please enter movie name or select director.");
document.getElementById("filter_data_div").innerHTML="";
document.getElementById("movie").focus();
return false;
}
var filterObjs = filterMovieDirectorData(inputStr,directorStr);
var text="";
for(var i=0; i<filterObjs.length; i++){
text+='<div id="filter_data"><div><h3>'+filterObjs[0].name+'</h3></div>';
text+='<div>Director : '+filterObjs[0].director+'</div></div><div class="clear"></div>';
}
if(filterObjs.length===0){document.getElementById("filter_data_div").innerHTML='<div id="filter_data"><div><h3>No movies found.</h3></div></div>';}else
document.getElementById("filter_data_div").innerHTML=text;
}
window.onload=function(){
getDirectors();
}
function getDirectors(){
for(var i=0; i<jsonobj.length; i++){
//console.log(jsonobj[i].director);
var option = document.createElement("option");
option.text = jsonobj[i].director;
option.value = i;
var daySelect = document.getElementById('director');
daySelect.appendChild(option);
}
}
</script>
<style>
#director{
line-height: 3px;
padding: 20px;
font-size: 21px;
color: #acacac;
}
#go{
background: #FFC000;
padding: 11px 14px 16px 11px;
font-size: 36px;
line-height: 3;
color: #fff;
margin: 0px;
text-align: center;
}
#movie{
width: 213px;
font-size: 21px;
margin-left: 12px;
padding: 20px;
color:#ACACAC;
}
#main_div{
background: #EEEEEE;
width: 554px;
min-height:120px;
}
#filter_data{
width: 335px;
background: #D8D8D8;
padding: 1px 0px 20px 13px;
margin: 20px 0px 0px 12px;
border: 1px solid #000;
}
a{text-decoration:none;}
.clear{clear: both;}
</style>
</head>
<body>
<div id="main_div">
<div style="display:block;">
<input type="text" id="movie" placeholder="Enter movie name">
<select id="director" ><option value="">Director</option></select>
<a href="javascript:;" id="go" onclick="getFilterDirectorJson(event)">Go</a>
</div>
<div id="filter_data_div"></div>
</div>
</body>
</html>
首先，一旦获得所有json数据，就需要遍历它们。为此，
**$.each(data, function (i, data) {
if (data.title >= "textBox1Value" && item.title <= "textBox2Value")
//then the data;
});**
- 列出项目
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