拦截器如下：

public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {     PrintWriter writer=response.getWriter();     response.setContentType("application/json;charset=UTF-8");     response.setCharacterEncoding("UTF-8");     writer.println("{"language":"简体中文"}");     writer.flush();     writer.close();     return false; }

上面返回时，中文只显示几个问号。Controller里返回的中文是不会乱码的。什么回事呢？