json转义html

 把json对象里的string类型的值，进行html转义。思路是，遍历json对象所有的string类型的value值，对其进行转义。

var html = (function(){
    var inst;
    var obj = (function(){});
    var create = function(){
        if(!inst){
            inst = new obj();
        }
        return inst;
    }

    //转义json的html值
    obj.prototype.EscapeJsonValue = function(json){
        if(json instanceof Array){
            for(var i = 0;i < json.length; i++) {
                var item = json[i];
                inst.EscapeJsonValue(item);
            }
        }else if(json instanceof Object){
            for (var key in json) {
                var val = json[key]
                if(typeof(val) === "string"){
                    json[key] = inst.htmlEscape(val);
                }else{
                    inst.EscapeJsonValue(val);
                }
            }
        }
    }
    //转义html文本
    obj.prototype.htmlEscape = function(str){
        if(!str) return "";
        return str.replace(/[<>&"']/g,function(c){
            return {'<':'<','>':'>','&':'&','"':'"','\'':'''}[c];
        });
    }
    //反转义html文本
    obj.prototype.htmlUnEscape = function(str){
        var arrEntities={'lt':'<','gt':'>','nbsp':' ','amp':'&','quot':'"','#39':'\''};
        return str.replace(/&(lt|gt|nbsp|amp|quot|#39);/ig,function(all,t){
            return arrEntities[t];
        });
    }

   return {create: create};
})().create();


//调用
var json = [{'a':'b','c':'\''},{'aaa':[{'zz':'xx'}],'ddd':{'222':'"sss"'}}];
html.EscapeJsonValue(json);
console.log(json);