StringUtil.js
//去除字符串中間空格
String.prototype.Trim = function() {
return this.replace(/(^s*)|(s*$)/g, "");
};
//去除字符串左側空格
String.prototype.LTrim = function() {
return this.replace(/(^s*)/g, "");
};
//去除字符串右側空格
String.prototype.RTrim = function() {
return this.replace(/(s*$)/g, "");
};
//去除字符串中所有空格(包括中間空格,需要設置第2個参數为:g)
function Trim(str,is_global){
var result;
result = str.replace(/(^s+)|(s+$)/g,"");
if(is_global.toLowerCase()=="g")
result = result.replace(/s/g,"");
return result;
};
indexedDB.js
window.onload = function(){
if(!window.indexedDB){
window.indexedDB = window.mozIndexedDB || window.webkitIndexedDB;
}
var db = null;
var request = indexedDB.open("mydb");
request.onupgradeneeded = function(e){
//db = request.result;
db = e.target.result;
createObjectStore(db);
}
function createObjectStore(db){
if(db.objectStoreNames.contains("customer")){
db.deleteObjectStore("customer");
}
var objectStore = db.createObjectStore("customer",{keyPath:"id",autoIncrement:true});
objectStore.createIndex("name","name",{unique:false});
objectStore.createIndex("email","email",{unique:true});
objectStore.add({name: "Tom", sex: "male", age: 34, email: "[email protected]"});
objectStore.add({name: "Jiny", sex: "female", age: 25, email: "[email protected]"});
objectStore.add({name: "Liam", sex: "male", age: 23, email: "[email protected]"});
}
request.onsuccess = function(e){
db = e.target.result;
if(!db.version=="1.0"){
var request = db.setVersion("1.0");
request.onsuccess = function(e){
createObjectStore(db);
showDataByCursor();
}
request.onerror = function(e){
alert(e);
}
}else{
showDataByCursor();
}
}
function showDataByCursor(objectStore){
if(!objectStore){
var transaction = db.transaction(["customer"]);
objectStore = transaction.objectStore("customer");
}
console.log("Store-Name : "+objectStore.name);
console.log("Store-KeyPath : "+objectStore.keyPath);
var request = objectStore.openCursor();
request.onsuccess = function(e){
var cursor = e.target.result;
if(cursor){
console.log(cursor.key);
console.log(cursor.value);
var data = cursor.value;
data.id = cursor.key;
showInTable(data);
cursor.continue();
}
}
request.onerror = function(e){
console.log("ERROR");
}
}
var table = document.getElementsByTagName("table")[0];
function showInTable(data){
//table.childNodes
var tbody = table.children[1];
//tbody = document.getElementsByTagName("tbody")[0];
var tr = document.createElement("tr");
var td_id = createTd(data,"id")
var checkBox=document.createElement("input");
checkBox.setAttribute("type","checkbox");
checkBox.setAttribute("name","check");
var textNode = td_id.childNodes[0];
checkBox.setAttribute("id",textNode.nodeValue);
//td_id.removeChild(textNode);
td_id.appendChild(checkBox);
//td_id.appendChild(textNode);
tr.appendChild(td_id);
var td_name = createTd(data,"name");
tr.appendChild(td_name);
var td_sex = createTd(data,"sex");
tr.appendChild(td_sex);
var td_age = createTd(data,"age");
tr.appendChild(td_age);
var td_email = createTd(data,"email");
tr.appendChild(td_email);
tbody.appendChild(tr);
}
function createTd(data,key){
var td = document.createElement("td");
td.contentEditable = "true";
var namedNodeMap = td.attributes;
var attrKey = document.createAttribute("key");
attrKey.value = key;
namedNodeMap.setNamedItem(attrKey);
var attrValue = document.createAttribute("value");
attrValue.value = data[key];
namedNodeMap.setNamedItem(attrValue);
var attrType = document.createAttribute("type");
attrType.value = typeof(data[key]);
namedNodeMap.setNamedItem(attrType);
td.innerText = data[key];
td.onblur = function(event){
console.log(this.parentNode.firstElementChild.innerText);
console.log(this.innerText.LTrim().RTrim());
console.log(this.attributes["value"].value);
console.log(this.attributes["key"].value);
console.log(this.innerText);
if(this.attributes["value"].value != this.innerText.LTrim().RTrim()){
saveOrUpdate(event.target); //或saveOrUpdate(this)
}
}
return td;
}
function saveOrUpdate(obj){
var id = obj.parentNode.firstElementChild.innerText;
var transaction = db.transaction(["customer"],"readwrite");
var objectStore = transaction.objectStore("customer");
var request = objectStore.get(parseInt(id));
//var range = IDBKeyRange.only("Donna");
//var request = objectStore.index("name").openCursor(range);
request.onsuccess = function(event){
if(event.target.result){
//objectStore.delete(id);
var data = event.target.result;
console.log("Update : " + data);
var value = obj.attributes["type"].value=="number"?parseInt(obj.innerText):obj.innerText;
data[obj.attributes["key"].value] = value;
var updateRequest = objectStore.put(data);
updateRequest.onsuccess = function(event){
//console.log(event.target);
console.log("UPDATE SUCCESS");
}
updateRequest.onerror = function(event){
console.log("UPDATE ERROR");
}
}else{
var data = {};
var tds = obj.parentNode.children;
for(var i=0;i<tds.length;i++){
var td = tds[i];
var key = td.attributes["key"].value;
data[key] = td.attributes["type"].value=="number"?parseInt(td.innerText):td.innerText;
}
console.log("Add : " + data);
var saveRequest = objectStore.add(data);
saveRequest.onsuccess = function(){
console.log("SAVE SUCCESS");
}
saveRequest.onerror = function(){
console.log("SAVE ERROR");
}
}
};
request.onerror = function(event){
alert(event);
};
}
/*搜索*/
var name = document.getElementsByName("name")[0];
var email = document.getElementsByName("email")[0];
var select = document.getElementsByTagName("button")[0];
select.onclick = function(event){
var value_name = name.value.LTrim().RTrim();
var value_email = email.value.LTrim().RTrim();
var transaction = db.transaction(["customer"],"readonly");
var objectStore = transaction.objectStore("customer");
var tbody = table.children[1];
var elements = tbody.children;
//var i=0;
while(elements.length > 0){
tbody.removeChild(elements[0]);
}
if(value_name=="" && value_email==""){
var request = objectStore.openCursor();
request.onsuccess = function(event){
var cursor = event.target.result;
if(cursor){
showInTable(cursor.value)
cursor.continue();
}
console.log("GETALL SUCCESS");
};
request.onerror = function(event){
console.log(event.target);
console.log("GETALL ERROR");
};
}else{
if(value_name!=""){
var range = IDBKeyRange.only(value_name);
var request = objectStore.index("name").openCursor(range);
request.onsuccess = function(event){
var cursor = event.target.result;
if(cursor){
console.log("key : "+cursor.key);
console.log("value : "+cursor.value);
showInTable(cursor.value)
cursor.continue();
}
console.log("SELECT BY NAME SUCCESS");
}
request.onerror = function(event){
console.log("SELECT BY NAME ERROR");
}
}
if(value_email!=""){
var range = IDBKeyRange.only(value_email);
var request = objectStore.index("email").openCursor(range);
request.onsuccess = function(event){
var cursor = event.target.result;
if(cursor){
console.log("key : "+cursor.key);
console.log("value : "+cursor.value);
showInTable(cursor.value)
cursor.continue();
}
console.log("SELECT BY EMIAL SUCCESS");
}
request.onerror = function(event){
console.log("SELECT BY EMAIL ERROR");
}
}
}
}
/*刪除和清空*/
var checkAll = document.getElementsByName("checkAll")[0];
var btnDelete = document.getElementsByName("delete")[0];
var btnClear = document.getElementsByName("clear")[0];
checkAll.onclick = function(event){
var checkBoxs = document.getElementsByName("check");
console.log(checkBoxs);
if(this.checked==true){
for(var i=0;i<checkBoxs.length;i++){
checkBoxs[i].checked = true;
}
}else{
for(var i=0;i<checkBoxs.length;i++){
checkBoxs[i].checked = false;
}
}
};
btnDelete.addEventListener("click",function(event){
var checkBoxs = document.getElementsByName("check");
console.log(checkBoxs);
var transaction = null;
var objectStore = null;
var request = null;
for(var i=0;i<checkBoxs.length;i++){
var checkBox = checkBoxs[i];
if(checkBox.checked == true){
if(request == null){
transaction = db.transaction(["customer"],"readwrite");
objectStore = transaction.objectStore("customer");
}
var id = parseInt(checkBox.attributes["id"].value);
console.log("checked : "+id);
request = objectStore.get(id);
request.onsuccess = function(event){
if(event.target.result){
var record = event.target.result;
objectStore.delete(record.id);
for(var j=0;j<checkBoxs.length;j++){
if(checkBoxs[j].attributes["id"].value-record.id==0){
var tr = checkBoxs[j].parentElement.parentElement;
var tbody = checkBoxs[j].parentElement.parentElement.parentElement;
tbody.removeChild(tr);
break;
}
}
console.log("DELETE SUCCESS");
}
};
request.onerror = function(event){
console.log("DELETE ERROR");
};
}
}
});
btnClear.onclick = function() {
var deleteDB = indexedDB.deleteDatabase("mydb");
var tbody = document.getElementsByTagName("tbody")[0];
if(tbody) {
table.removeChild(tbody);
}
deleteDB.onsuccess=function(event){
console.log("success delete database!");
};
deleteDB.onerror=function(event){
console.dir(event.target);
};
};
};
indexedDB.html
<!doctype html> <html> <head> <meta charset="utf-8"/> <title>IndexedDB</title> <script type="text/javascript" src="StringUtil.js"></script> <!--<script type="text/javascript" src="jquery-1.8.3.js"></script>--> <script type="text/javascript" src="indexedDB.js"></script> </head> <body> <div> <label>姓名：<input type="text" name="name" value="" style="width:50px;height:15px;"/></label> <label>邮箱：<input type="text" name="email" value="" style="width:80px;height:15px;"/></label> <button type="button">查询</button> </div> <table> <thead> <tr> <th>ID</th> <th>姓名</th> <th>性別</th> <th>年龄</th> <th>邮箱</th> </tr> </thead> <tbody> </tbody> <tfoot> <tr> <td colspan="5"> <label style="font-size:14px"><input type="checkbox" name="checkAll"/>全选</label> <input type="button" name="delete" value="刪除选中"/> <input type="button" name="clear" value="清空数据库"/> </td> </tr> </tfoot> </table> </body> </html>
运行效果：
第一次打开页面：
根据姓名查询：
修改ID为1的姓名Tom为Tomm：
再次根据Tom查询，没有查询到，说明修改成功。
根据Tomm查询，能将第一条信息查询出来。
选中ID为2的记录，点击“删除选中”后，结果如下：
点击“清空数据库”后，结果如下：