SpringMVC常用注解3SpringMVC注入session、IO、本地化变量

1.获取session对象：直接在参数中写入，springMVC就会自动注入

@RequestMapping("/showSession")    public String userServletSession(HttpSession session) {        session.setAttribute("username", "wuyonghu");        return "welcome";    }

2.获取io流对象：（写入后自动注入）

@RequestMapping("/showIo")    public String getInAndOutputStream(OutputStream out, InputStream in, Reader reader, Writer writer) {        return "welcome";    }

3.获取本地化变量locale:也是自动注入

@RequestMapping("/showLocale")    public String showLocale(Locale locale) {        return "welcome";    }