Jquery和Struts2实现数据异步交换

在js中

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HttpServletRequest request = ServletActionContext.getRequest();HttpServletResponse response=ServletActionContext.getResponse();response.setContentType("text/html;charset=utf-8");PrintWriter out = response.getWriter();HttpSession session=request.getSession();Session sess = MySessionFactory.getSessionFactory().getCurrentSession();Transaction tx = sess.beginTransaction();Query q=sess.createQuery("from BusinessUsers where name='"+name+"'");System.out.println(name);List list=q.list();tx.commit();if(list.size()==0){out.print("yes");}else{out.print("no");}return null;