localStorage的过期时间设置的方法详解

<script type="text/javascript">
    //封装过期控制代码
    function set(key,value){
        var curTime = new Date().getTime();
        localStorage.setItem(key,JSON.stringify({data:value,time:curTime}));
    }
    function get(key,exp){
        var data = localStorage.getItem(key);
        var dataObj = JSON.parse(data);
        if (new Date().getTime() - dataObj.time>exp) {
            console.log('信息已过期');
            //alert("信息已过期")
        }else{
            //console.log("data="+dataObj.data);
            //console.log(JSON.parse(dataObj.data));
            var dataObjDatatoJson = JSON.parse(dataObj.data)
            return dataObjDatatoJson;
        }
    }
 </script>

<script>
window.onload = function(){
    var Ipt = document.getElementById('input1');
    var value = '{"name":"和派孔明","Age":"18","address":"陆家嘴金融城"}';
    set('information',value);

    Ipt.onclick = function(){
        //var dataObjData=get('information',1000);//过期时间为1秒,正常情况下，你点击的时候已经过期
        //var dataObjData=get('information',1000*60);//过期时间为1分钟
        //var dataObjData=get('information',1000*60*60);//过期时间为1小时
        //var Obj=get('information',1000*60*60*24);//过期时间为24小时
        var dataObjData=get('information',1000*60*60*24*7);//过期时间为1周
        console.log(dataObjData || null);
            if (dataObjData!="" && dataObjData!=null) {
                    console.log("姓名:"+dataObjData.name);
                    console.log("年龄:"+dataObjData.Age );
                    console.log("地址:"+dataObjData.Age );
            }else{
                alert("获取的信息已经过期");
            }   
    }
}
</script>