不允许输入某些非法字符或者敏感字符

解决思路：
1、获得输入的值
2、定义非法数组
3、遍历这个数组
4、判断这个数组是否包含这些字

理论上前台校验即可，但是一般重要的这种校验，最好是前后台均做判断，防止有人拼接url进行恶意查询！

前台校验：

var ban_str=["中","国","中国","有","限","有限","责","任","责任","公","司","公司","集","团","集团","北","北京","京","股","份","股份","投","资","投资","管","理","管理","L","T","D","LT","TD","LD","LTD"];

                function relative_search() {
                   var send_falg=true;
                   var mainBody=$("input[name='mainBody']:checked").val();
                   var relationType=$("input[name='relationType']:checked").val();
                   var relatedPartyName=$("input[name=relatedPartyName]").val();

                   for(var i in ban_str){
                       if(ban_str[i]==relatedPartyName.toUpperCase()){
                           send_falg=false;
                       }
                   }
                    //如果值不为空或者不为敏感关键词则发送ajax进行查询
                   if(send_falg && !chkblk(relatedPartyName)){
                        //ajax请求查询
                        。。。
                    }

                //判断不为空或者不为空串
                function chkblk(ele) {
                    //去掉所有空格后再判断是否为空
                    if (ele.replace(/(^\s*)|(\s*$)/g, "")==""){
                        return true;
                    }
                }

后台验证：

String relatedPerson = request.getParameter("relatedPartyName"); 
String strs[] ={"有","限","责","任","公","司","集","团","北","京","股","份","投","资","管","理","L","T","D"};
for (String str:strs){
    if(relatedPerson.indexOf(str)!=-1){
        return ResultPageData.failure("不允许查询有限、责任、公司、集团、北京、股份、投资、管理、LTD等关键字！").toJson();
    }
}