java 方法 返回重定向

//查询
@RequestMapping("/showInfos")
public  Object showUserInfos(HttpServletResponse resp, HttpServletRequest req){
    List<UserInfo> userInfos = userService.getUsers();
    req.setAttribute("userInfos",userInfos);
    return "/user/list";
}

//添加
@RequestMapping("/insert")
public  Object insert(HttpServletResponse resp, HttpServletRequest req){
    UserInfo userInfo = new UserInfo();
    String id = req.getParameter("id");
    String name = req.getParameter("uname");
    userInfo.setId(Integer.valueOf(id).intValue());
    userInfo.setUname(name);
    int state = userService.insert(userInfo);
    if(state < 0){
        return "/user/faile";
    }
    return "redirect:/user/showInfos.do";
}

添加方法返回时重定向到查询方法。