<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> </head> <body> <div style="border: 2px dashed #ccc;320px;text-align:center;"> <label for="sitename">网站名(key)：</label> <input type="text" id="sitename" name="sitename" class="text"/> <br/> <label for="siteurl">网 址(value)：</label> <input type="text" id="siteurl" name="siteurl"/> <br/> <input type="button" onclick="save()" value="新增记录"/> <hr/> <label for="search_phone">输入网站名：</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> // 载入所有存储在localStorage的数据 loadAll(); //保存数据 function save(){ var siteurl = document.getElementById("siteurl").value; var sitename = document.getElementById("sitename").value; localStorage.setItem(sitename, siteurl); alert("添加成功"); } //查找数据 function find(){ var search_site = document.getElementById("search_site").value; var siteurl = localStorage.getItem(search_site); var find_result = document.getElementById("find_result"); find_result.innerHTML = search_site + "的网址是：" + siteurl; } //将所有存储在localStorage中的对象提取出来，并展现到界面上 function loadAll(){ var list = document.getElementById("list"); if(localStorage.length>0){ var result = "<table border='1'>"; result += "<tr><td>key</td><td>value</td></tr>"; for(var i=0;i<localStorage.length;i++){ var sitename = localStorage.key(i); var siteurl = localStorage.getItem(sitename); result += "<tr><td>"+sitename+"</td><td>"+siteurl+"</td></tr>"; } // result += "</table>"; list.innerHTML = result; }else{ list.innerHTML = "数据为空……"; } } </script> </body> </html> Json处理 <!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;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> <!-- sessionStorage 对象 <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <script> function clickCounter() { if(typeof(Storage)!=="undefined") { if (localStorage.clickcount) { localStorage.clickcount=Number(localStorage.clickcount)+1; } else { localStorage.clickcount=1; } document.getElementById("result").innerHTML=" 你已经点击了按钮 " + localStorage.clickcount + " 次 "; } else { document.getElementById("result").innerHTML="对不起，您的浏览器不支持 web 存储。"; } } </script> </head> <body> <p><button onclick="clickCounter()" type="button">点我！</button></p> <div id="result"></div> <p>点击该按钮查看计数器的增加。</p> <p>关闭浏览器选项卡(或窗口),重新打开此页面,计数器将继续计数(不是重置)。</p> <div id="result"></div> <script> if(typeof(Storage)!=="undefined") { localStorage.sitename="菜鸟教程"; document.getElementById("result").innerHTML="网站名：" + localStorage.sitename; } else { document.getElementById("result").innerHTML="对不起，您的浏览器不支持 web 存储。"; } </script> localStorage.sitename </body> </html> localStorage - 用于长久保存整个网站的数据，保存的数据没有过期时间，直到手动去除。 sessionStorage - 用于临时保存同一窗口(或标签页)的数据，在关闭窗口或标签页之后将会删除这些数据 保存数据：localStorage.setItem(key,value); 读取数据：localStorage.getItem(key); 删除单个数据：localStorage.removeItem(key); 删除所有数据：localStorage.clear(); 得到某个索引的key：localStorage.key(index); localStorage.removeItem("sitename");移除sitename -->