springmvc获取response时，报错ServletRequestAttributes cannot be resolved to a type，不缺包

Posted 2023-04-09

HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
HttpServletResponse response = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getResponse();

参考技术A 不明白，springmvc为什么要这样获取response，在controller里加参数就可以了啊，
@RequestMapping(value="/test")
@ResponseBody
public Object test(@RequestParam Map<String, String> param,Model model,HttpServletResponse response)

springmvc中使用response的out.print问题

public ModelAndView handleRequest(HttpServletRequest request,  
        HttpServletResponse response) throws Exception {  
    Member member = (Member) RequestUtil.parseRequestToObject(request,Member.class);  
    if (member == null) {  
        jzLogic.insertMember(member);  
        return new ModelAndView("index");  
    } else {  
        return new ModelAndView("Error", "message", "账号已被注册！");  
    }  
}  

在上述代码中如果需要使用out.print打印如alert("");信息可按以下方式进行：

......  
    response.setContentType("text/html; charset=gbk");  
    PrintWriter out = response.getWriter();   
    out.println("<script language=‘javascript‘>");   
    out.println("alert(‘账号已被注册！‘);");  
    out.println("history.back();");   
    out.print("</script>");   
    return null;  
......  

return null，如果return new ModelAndView则直接转发