实例在线编辑器(cainiaojc.com)

var site = new Object;
...
var str = JSON.stringify(site); // 将对象转换为字符串</pre></div></div><p>之后我们使用 JSON.parse 方法将字符串转换为 JSON 对象：</p><div><div class="example_code"><label class="example_title">示例</label><pre>var site = JSON.parse(str);</pre></div></div><p>JavaScript 实现代码：</p><div><h2>save() 与 find() 方法</h2><div class="example_code"><label class="example_title">示例</label><pre>//保存数据  
function save(){  
    var site = new Object;
    site.keyname = document.getElementById("keyname").value;
    site.sitename = document.getElementById("sitename").value;  
    site.siteurl = document.getElementById("siteurl").value;
    var str = JSON.stringify(site); // 将对象转换为字符串
    localStorage.setItem(site.keyname,str);  
    alert("保存成功");
}  
//查找数据  
function find(){  
    var search_site = document.getElementById("search_site").value;  
    var str = localStorage.getItem(search_site);  
    var find_result = document.getElementById("find_result");
    var site = JSON.parse(str);  
    find_result.innerHTML = search_site + "的网站名是：" + site.sitename + "，网址是：" + site.siteurl;  
}</pre></div></div><p>完整示例如下：</p><div class="example_code"><label class="example_title">示例</label><pre><!DOCTYPE html>
<html>  
<head>  
    <meta charset="utf-8">  
    <title>HTML5本地存储之Web Storage篇</title>  
</head>  
<body>  
    <div style="border: 2px dashed #ccc;width:320px;text-align:center;">
        <label for="keyname">别名(key):</label>  
        <input type="text" id="keyname" name="keyname" class="text"/>  
        <br/>  
        <label for="sitename">网站名：</label>  
        <input type="text" id="sitename" name="sitename" class="text"/>  
        <br/>  
        <label for="siteurl">网 址：</label>  
        <input type="text" id="siteurl" name="siteurl"/>  
        <br/>  
        <input type="button" onclick="save()" value="新增记录"/>  
        <hr/>  
        <label for="search_phone">输入别名(key)：</label>  
        <input type="text" id="search_site" name="search_site"/>  
        <input type="button" onclick="find()" value="查找网站"/>  
        <p id="find_result"><br/></p>  
    </div>  
    <br/>  
    <div id="list">  
    </div>  
    <script>
    //保存数据  
    function save(){  
        var site = new Object;
        site.keyname = document.getElementById("keyname").value;
        site.sitename = document.getElementById("sitename").value;  
        site.siteurl = document.getElementById("siteurl").value;
        var str = JSON.stringify(site); // 将对象转换为字符串
        localStorage.setItem(site.keyname,str);  
        alert("保存成功");
    }  
    //查找数据  
    function find(){  
        var search_site = document.getElementById("search_site").value;  
        var str = localStorage.getItem(search_site);  
        var find_result = document.getElementById("find_result");
        var site = JSON.parse(str);  
        find_result.innerHTML = search_site + "的网站名是：" + site.sitename + "，网址是：" + site.siteurl;  
    }  
    
    //将所有存储在localStorage中的对象提取出来，并展现到界面上
    // 确保存储的 keyname 对应的值为转换对象，否则JSON.parse会报错
    function loadAll(){  
        var list = document.getElementById("list");  
        if(localStorage.length>0){  
            var result = "<table border='1'>";  
            result += "<tr><td>别名</td><td>网站名</td><td>网址</td></tr>";  
            for(var i=0;i<localStorage.length;i++){ 
                var keyname = localStorage.key(i);  
                var str = localStorage.getItem(keyname);  
                var site = JSON.parse(str);  
                result += "<tr><td>"+site.keyname+"</td><td>"+site.sitename+"</td><td>"+site.siteurl+"</td></tr>";  
            }  
            result += "</table>";  
            list.innerHTML = result;  
        }else{  
            list.innerHTML = "数据为空...";  
        }  
    }  
    </script>
</body>  
</html>