将带有长字符串的JSON发送到Ajax

Question

我正在制作一个Web应用程序，可以在Java Servlet中使用休眠功能从数据库读取大数据。当我从数据库字段中读取大数据时，我将其成功地放入了String中，之后我想将其放入JSON中并将其传递给Javascript Ajax，但是对于JSON而言似乎数据太大。当我尝试将较小的JSON传递给Ajax时，它可以正常工作。怎么了？

这是我的Ajax：

$.post("servletispistabeleuseru", {"user":user}, function(data){
    var tab=data.result;
    console.log(tab);
});

这是我的Servlet：

protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("application/json");
        String user=request.getParameter("user");
        Configuration myConf = new Configuration();
        myConf.configure("hib/hibernate.cfg.xml");
        StandardServiceRegistry service = new StandardServiceRegistryBuilder().
        applySettings(myConf.getProperties()).build();
        SessionFactory myFactory = myConf.buildSessionFactory(service);
        Session conn = myFactory.openSession();
        Transaction t = conn.beginTransaction();

        List<User>useri;
        useri=conn.createQuery("SELECT u FROM User u WHERE useUsername='"+user+"'").list();
        String result=useri.get(0).getUseKineski();

        System.out.println(result);
        t.commit();
        conn.close();
        try (PrintWriter out = response.getWriter()) {
            /* TODO output your page here. You may use following sample code. */
            out.print("{\"result\":\"" + result + "\"}");
        }
    }