说明:
1. 在项目中使用一些工具类,公共类是非常有必要的,不仅是后台,前段亦是一样
2. 这里提供我收集的常用方法封装
注意:
1. 字符串的拼接一定使用StringBuffer来拼接,否则容易造成浏览器卡顿或内存溢出。特别是针对一些执行js效率不高的浏览器!!
2. 经常对输入框里内容清空,对textarea,可以直接$("textarea").empty();如果使用$("textarea").html("");也可能会造成浏览器内存溢出!!
Date工具类
/********************** date工具类 ***************/
Date.prototype.format = function(format){
var o = {
"M+" : this.getMonth()+1, //month
"d+" : this.getDate(), //day
"h+" : this.getHours(), //hour
"m+" : this.getMinutes(), //minute
"s+" : this.getSeconds(), //second
"q+" : Math.floor((this.getMonth()+3)/3), //quarter
"S" : this.getMilliseconds() //millisecond
}
if(/(y+)/.test(format)) format=format.replace(RegExp.$1,(this.getFullYear()+"").substr(4- RegExp.$1.length));
for(var k in o)if(new RegExp("("+ k +")").test(format))
format = format.replace(RegExp.$1,RegExp.$1.length==1? o[k] : ("00"+ o[k]).substr((""+ o[k]).length));
return format;
};
公共工具类
/********************** 公共工具类 ***************/
var PublicUtil ={
isNotEmpty: function(val){
return !this.isEmpty(val);
},
isEmpty: function(val){
if ((val==null || typeof(val)=="undefined")|| (typeof(val)=="string"&&val==""&&val!="undefined")){
return true;
}else{
return false;
}
},
isDebug: function(){
if(this.isNotEmpty(configDebug)&&configDebug=="true"){
return true;
}else{
return false;
}
},
//去除元素内所有内容 strIds:"#id1,#id2,#id3"
emptyHtml: function(strIds){
try{
var ids = strIds.trim(",").split(",");
$(ids).each(function(){
var obj = $(this.toString());
if(obj.length>0){
$(obj).each(function(){
$(this).html("");
});
}else{
obj.html("");
}
});
}catch(ex){
if(PublicUtil.isDebug()){
throw new Error("js方法:【PublicUtil.emptyHtml(strIds)】,error!");
}
}
},
//去除元素的值 strIds:"#id1,#id2,#id3"
emptyValue: function(strIds){
try{
var ids = strIds.trim(",").split(",");
$(ids).each(function(){
var obj = $(this.toString());
if(obj.length>0){
$(obj).each(function(){
$(this).val("");
});
}else{
obj.val("");
}
});
}catch(ex){
if(PublicUtil.isDebug()){
throw new Error("js方法:【PublicUtil.emptyValue(strIds)】,error!");
}
}
},
//去除Textarea内所有内容 strIds:"#id1,#id2,#id3"
emptyTextarea: function(strIds){
try{
var ids = strIds.trim(",").split(",");
$(ids).each(function(){
var obj = $(this.toString());
if(obj.length>0){
$(obj).each(function(){
$(this).empty();
$(this).val("");
});
}else{
obj.empty();
obj.val("");
}
});
}catch(ex){
if(PublicUtil.isDebug()){
throw new Error("js方法:【PublicUtil.emptyTextarea(strIds)】,error!");
}
}
}
}
String 工具类
/********************** String工具类***************/
//trim去掉字符串两边的指定字符,默去空格
String.prototype.trim = function(tag) {
if (!tag) {
tag = '\\s';
}else {
if (tag == '\\') {
tag = '\\\\';
} else if (tag == ',' || tag == '|' || tag == ';') {
tag = '\\' + tag;
}else {
tag = '\\s';
}
}
eval('var reg=/(^' + tag + '+)|(' + tag + '+$)/g;');
return this.replace(reg, '');
};
//字符串截取后面加入...
String.prototype.interceptString = function(len) {
if (this.length > len) {
return this.substring(0, len) + "...";
} else {
return this;
}
}
//将一个字符串用给定的字符变成数组
String.prototype.toArray = function(tag) {
if (this.indexOf(tag) != -1) {
return this.split(tag);
}else {
if (this != '') {
return [this.toString()];
}else {
return [];
}
}
}
//只留下数字(0123456789)
String.prototype.toNumber= function() {
return this.replace(/\D/g, "");
}
//保留中文
String.prototype.toCN= function() {
var regEx = /[^\u4e00-\u9fa5\uf900-\ufa2d]/g;
return this.replace(regEx, '');
}
//转成int
String.prototype.toInt= function() {
var temp = this.replace(/\D/g, "");
return isNaN(parseInt(temp)) ? this.toString() : parseInt(temp);
}
//是否是以XX开头
String.prototype.startsWith= function(tag){
return this.substring(0, tag.length) == tag;
}
//是否已XX结尾
String.prototype.endWith= function(tag){
return this.substring(this.length - tag.length) == tag;
}
//StringBuffer
var StringBuffer = function() {
this._strs = new Array;
};
StringBuffer.prototype.append = function (str) {
this._strs.push(str);
};
StringBuffer.prototype.toString = function() {
return this._strs.join("");
};
String.prototype.replaceAll = function(s1,s2){
return this.replace(new RegExp(s1,"gm"),s2);
}
Arry
/********************** Arry ***************/
//根据数据取得再数组中的索引
Array.prototype.getIndex = function(obj){
for (var i = 0; i < this.length; i++) {
if (obj == this[i]) {
return i;
}
}
return -1;
}
//移除数组中的某元素
Array.prototype.remove= function (obj) {
for (var i = 0; i < this.length; i++) {
if (obj == this[i]) {
this.splice(i, 1);
break;
}
}
return this;
}
//判断元素是否在数组中
Array.prototype.contains= function (obj) {
for (var i = 0; i < this.length; i++) {
if (obj == this[i]) {
return true;
}
}
return false;
}
浏览器相关操作
/********************** 浏览器相关操作 ***************/
//进入全屏模式, 判断各种浏览器,找到正确的方法
var launchFullScreen = function (element) {
if(element.requestFullscreen) {
element.requestFullscreen();
} else if(element.mozRequestFullScreen) {
element.mozRequestFullScreen();
} else if(element.webkitRequestFullscreen) {
element.webkitRequestFullscreen();
} else if(element.msRequestFullscreen) {
element.msRequestFullscreen();
}
return true;
}
//退出全屏模式
var exitFullScreen = function () {
if(document.exitFullscreen) {
document.exitFullscreen();
} else if(document.mozCancelFullScreen) {
document.mozCancelFullScreen();
} else if(document.webkitExitFullscreen) {
document.webkitExitFullscreen();
}
return false;
}
//cookie操作
var CookieUtil={
path: "/",
domain: 'demo.j2ee.com',
add: function(name,val){
$.cookie(name, val, {expires: 7, path: this.path, domain: this.domain, secure: true});
},
remove: function(name){
$.cookie(name, null,{path: this.path, domain: this.domain});
},
get: function(name){
$.cookie(name,{path: this.path, domain: this.domain});
}
}
//error
var error={
e_404: function(){
alertMessage("404","未找到改页面!","warning");
},
e_500: function(){
alertMessage("500","服务器内部错误!","error");
},
e_403: function(){
alertMessage("403","权限不足!","warning");
}
}