原文链接：(29条消息) HTML5本地存储indexDB新建数据库、数据库增删改查操作_#麻辣小龙虾#的博客-CSDN博客_h5本都存储增删改查
完整代码
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no" />
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="author" content="sina_mobile">
<meta name="format-detection" content="telephone=no" />
<title>indexDB</title>
<style>
.outbox{
width:300px;
display:inline-block;
border:1px solid #ccc;
}
.innerbox{
height:400px;
color:#333;
line-height:20px;
font-size:12px;
width:300px;
}
</style>
</head>
<body>
<div class="outbox">
<button>IndexDB新增操作</button>
<div class="innerbox" id="content1"></div>
</div>
<div class="outbox">
<button>IndexDB修改操作</button>
<div class="innerbox" id="content2"></div>
</div>
<div class="outbox">
<button>IndexDB删除操作</button>
<div class="innerbox" id="content3"></div>
</div>
<div class="outbox">
<button>IndexDB遍历操作</button>
<div class="innerbox" id="content4"></div>
</div>
<script>
var content = null;
// 本演示使用的数据库名称
var dbName = 'project';
// 版本
var version = 1;
// 数据库数据结果
var db;
// 打开数据库
var DBOpenRequest = window.indexedDB.open(dbName, version);
// 如果数据库打开失败
DBOpenRequest.onerror = function(event) {
logError('数据库打开失败');
};
DBOpenRequest.onsuccess = function(event) {
// 存储数据结果
db = DBOpenRequest.result;
console.log('db',db)
};
// 下面事情执行于：数据库首次创建版本，或者window.indexedDB.open传递的新版本（版本数值要比现在的高）
DBOpenRequest.onupgradeneeded = function(event) {
db = event.target.result;
db.onerror = function(event) {
logError('数据库打开失败');
};
// 创建一个数据库存储对象
var objectStore = db.createObjectStore(dbName, {
keyPath: 'id',
autoIncrement: true
});
// 定义存储对象的数据项
objectStore.createIndex('id', 'id', {
unique: true
});
objectStore.createIndex('name', 'name');
objectStore.createIndex('begin', 'begin');
objectStore.createIndex('end', 'end');
objectStore.createIndex('person', 'person');
objectStore.createIndex('remark', 'remark');
};
var method = {
// 添加数据
add: function (newItem) {
var transaction = db.transaction([dbName], "readwrite");
// 打开已经存储的数据对象
var objectStore = transaction.objectStore(dbName);
// 添加到数据对象中
var objectStoreRequest = objectStore.add(newItem);
objectStoreRequest.onsuccess = function(event) {
alert('新增成功！');
};
},
// 更新数据
update: function (id, data) {
// 编辑数据
var transaction = db.transaction([dbName], "readwrite");
// 打开已经存储的数据对象
var objectStore = transaction.objectStore(dbName);
// 获取存储的对应键的存储对象
var objectStoreRequest = objectStore.get(id);
// 获取成功后替换当前数据
objectStoreRequest.onsuccess = function(event) {
// 当前数据
var myRecord = objectStoreRequest.result;
// 遍历替换
for (var key in data) {
if (typeof myRecord[key] != 'undefined') {
myRecord[key] = data[key];
}
}
// 更新数据库存储数据
objectStore.put(myRecord);
};
},
// 删除数据
del: function (id) {
// 打开已经存储的数据对象
var objectStore = db.transaction([dbName], "readwrite").objectStore(dbName);
// 直接删除
var objectStoreRequest = objectStore.delete(id);
// 删除成功后
},
// 通过主键key单个记录数据,主键是前面开始设置的相应key值
get: function (key) {
var transaction = db.transaction([dbName], "readwrite");
var store = transaction.objectStore(dbName);
var request = store.get(key);
request.onerror = function(){
console.error('getDataByKey error');
};
request.onsuccess = function(e){
var result = e.target.result;
console.log('查找数据成功')
console.log(result);
};
},
// 遍历数据表
cursor: function () {
var transaction = db.transaction([dbName], "readwrite");
var store = transaction.objectStore(dbName);
var request = store.openCursor();//打开游标
var arr = [];
request.onsuccess = function(e) {
var cursor = e.target.result;
if (cursor) {
console.log(cursor);
arr.push(cursor.value);
cursor.continue();
}
content = JSON.stringify(arr);
};
}
};
let count = 0;
// 新增
document.querySelectorAll('button')[0].onclick = function () {
// method.cursor();
method.add({name: 'zyc' + count++, begin: '2012-12-22', end: '2122-32-44', person: 'dada', remark: 'dada'});
method.cursor(); // 遍历所有数据库表project的记录，并输出到div里面
document.querySelector("#content1").innerHTML = content;
}
// 修改
document.querySelectorAll('button')[1].onclick = function () {
method.update(3, {name: '我是更改的值id=3', begin: '2012-12-22', end: '2122-32-44', person: 'dada', remark: 'dada'});
method.cursor(); // 遍历所有数据库表project的记录，并输出到div里面
document.querySelector("#content2").innerHTML = content;
}
// 删除
document.querySelectorAll('button')[2].onclick = function () {
method.del(2); // 删除主键key id = 2的值
method.cursor(); // 遍历所有数据库表project的记录，并输出到div里面
document.querySelector("#content3").innerHTML = content;
}
// 遍历
document.querySelectorAll('button')[3].onclick = function () {
method.cursor(); // 遍历所有数据库表project的记录，并输出到div里面
document.querySelector("#content4").innerHTML = content;
}
</script>
</body>
</html>
标签：function,存储,transaction,objectStore,db,var,转载,dbName,indexdDB From： https://www.cnblogs.com/myqinyh/p/17137495.html