Ajax校验是否重复的实现代码_AJAX相关_

 @ResponseBody @RequestMapping("entityFindByCode") public String entityFindByCode(Entity bean, HttpSession httpSession, Model m,HttpServletResponse res) throws IOException{ res.setContentType("text/plain; charset=UTF-8"); //res.reset(); //PrintWriter out = res.getWriter(); String data=null; @SuppressWarnings("unchecked") List list = (List) this.service.find("beanByCode", "Entity", new Object[]{bean.getCode()}); if(list.size()==0){ data="YES"; }else{ data="NO"; } res.getOutputStream().write(data.getBytes()); //out.print(data); //out.flush(); //out.close(); return data; }

 $.ajax({ url :'entityFindByCode', type :'post', dataType :'text', data :{code:$("#code").val()},//{key,value} success :function(data) { if (data == "YES"){ document.getElementById("msg-code").innerHTML = "()"; return true; } else { $("#div-code").addClass("has-error"); document.getElementsByName("code")[0].value = ""; //document.getElementsByName("code")[0].setAttribute("placeholder", ""); document.getElementById("msg-code").innerHTML = "( !!!)"; return false; } } });