if(content==null) return ""
String html = content
// html = html.replace( "'", "&apos")
html = html.replaceAll( "&", "&amp")
html = html.replace( "\"", "&quot") //"
html = html.replace( "\t", "&nbsp&nbsp")// 替换跳格
html = html.replace( " ", "&nbsp")// 替换空格
html = html.replace("<", "&lt")
html = html.replaceAll( ">", "&gt")
return html
}
/*1.用浏览器内部转换器实现html编码(转义)*/
htmlEncode : function (html){
//.首先动态创建一个容器标签元素,如DIV
var temp = document.createElement ("div")
//然后将要转换的字符串设置为这个元素的innerText或者textContent
(temp.textContent != undefined ) ? (temp.textContent = html) : (temp.innerText = html)
//最后返回这个元素的innerHTML,即得到经过HTML编码转换的字符串了
var output = temp.innerHTML
temp = null
return output
},
/*2.用浏览器内部转换器实现html解码(反转义)*/
htmlDecode : function (text){
//首先动态创建一个容器标签元素,如DIV
var temp = document.createElement("div")
//.然后将要转换的字符串设置为这个元素的innerHTML(ie,火狐,google都支持)
temp.innerHTML = text
//最后返回这个元素的innerText或者textContent,即得到经过HTML解码的字符串了。 var output = temp.innerText || temp.textContent
temp =null
return output
},
注:这两种方法都是利用innerHTML会编译字符串来实现转义和反转义
/*3.用正则表达式实现html编码(转义)*/
htmlEncodeByRegExp : function (str){
var temp = " "
if(str.length == 0)
return " "
temp = str.replace(/&/g,"&")
temp = temp.replace(//g,">")
temp = temp.replace(/\s/g," ")
temp = temp.replace(/\'/g,"'")
temp = temp.replace(/\"/g,""")
return temp
},
/*4.用正则表达式实现html解码(反转义)*/
htmlDecodeByRegExp:function (str){
var temp = ""
if (str.length == 0)
return " "
temp = str.replace(/&/g,"&")
temp = temp.replace(/</g,"<")
temp = temp.replace(/>/g,">")
temp = temp.replace(/ /g," ")
temp = temp.replace(/'/g,"\'")
temp = temp.replace(/"/g,"\"")
return temp
},
/*5.用正则表达式实现html编码(转义)(另一种写法)*/
html2Escape : function(sHtml) {
return sHtml.replace (/[<>&"]/g,function(c){return{'<':'<','>':'>','&':'&','"':'"'}[c]})
},
/*6.用正则表达式实现html解码(反转义)(另一种写法)*/
escape2Html : function (str) {
var arrEntities = {'lt':'<','gt':'>','nbsp':' ','amp':'&','quot':'"'}
return str.replace(/&(lt|gt|nbsp|amp|quot)/ig,function(all,t){return arrEntities[t]})
}
原文地址: https://www.cnblogs.com/willingtolove/p/11059325.html
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