$(document).ajaxSend(onSend);
function onSend(e,xhr,o) {
    o.data=dataEncode(o.data);
};
function htmlEncode (str){
    var s = "";
    if (str.length == 0) return "";
    //s = str.replace(/ /g, " ");
    //s = str.replace(/&/g, "&");
    s = str.replace(//g, "%26gt%3B");
    s = s.replace(/%3E/g, "%26gt%3B");
    s = s.replace(/%3e/g, "%26gt%3B");
    //s = s.replace(/\'/g, "'");
    //s = s.replace(/\"/g, """);
    //s = s.replace(/\n/g, "
");
    return s;
};
function htmlEncodeOut (str){
    var s = "";
    if (str.length == 0) return "";
    //s = str.replace(/ /g, " ");
    //s = str.replace(/&/g, "&");
    s = str.replace(//g, ">");
    s = s.replace(/%3E/g, ">");
    s = s.replace(/%3e/g, ">");
    s = s.replace(/%26lt%3B/g, "<");
    s = s.replace(/%26lt%3b/g, "<");
    s = s.replace(/%26gt%3B/g, ">");
    s = s.replace(/%26gt%3b/g, ">");
    //s = s.replace(/\'/g, "'");
    //s = s.replace(/\"/g, """);
    //s = s.replace(/\n/g, "
");
    return s;
};
function dataEncode(data){
    var rel=data;
    var source="";
    if(typeof(rel) == "object"){
        source=htmlEncode(JSON.stringify(rel));
        source=JSON.parse(source);
        rel=source;
    }else if(typeof(rel) == "string"){
        source=htmlEncode(rel);
        rel=source;
    }
    return rel;
};
function dataEncodeOut(data){
    var rel=data;
    var source="";
    if(typeof(rel) == "object"){
        source=htmlEncodeOut(JSON.stringify(rel));
        source=JSON.parse(source);
        rel=source;
    }else if(typeof(rel) == "string"){
        source=htmlEncodeOut(rel);
        rel=source;
    }
    return rel;
};
/*
//此处的Ajax请求是一个示例；未使用框架封装的Ajax请求时，这需要在自己的ajax方法的success函数的首行添加-- data=dataEncodeOut(data);
jQuery.ajax({ 
    type:"post",
    data:data,
    url:"http://dfh.smartcity.com/portal/app/service/App.getStateCatalogues.json", 
    async:async,
    dataType:"json", 
    success: function aa(data) {
        //需要首行添加
        data=dataEncodeOut(data);
        alert("success已经收到："+data); 
    }
});*/

网站名称：Jquery封装Ajax过滤XSS
文章分享：http://chengdu.cdxwcx.cn/article/jhspic.html