Springmvc开发中java bean对象自动初始化失败求解

你这个方法是controller中表单提交后保存role的实现吧？

对springmvc种form表单提交绑定java bean对象，需要注意3个地方：

1.用户填写表单页面务必要初始化该对象

RoleController.java代码片段

@RequestMapping(value = "create", method = RequestMethod.GET)
public ModelAndView create(HttpSession session, HttpServletResponse response){
	ModelAndView modelAndView = new ModelAndView("role/create");
	Role role = new Role();
	modelAndView.addObject("role", role);
	return modelAndView;
}

2.springmvc modelandview对应页面

role/create.jsp代码片段

<form method="post" action="/role/create.jsp" id="app">
</form>

3.表单提交POST请求controller方法

RoleController.java代码片段

@RequestMapping(value = "create", method = RequestMethod.POST)
public ModelAndView create(Role role){
	ModelAndView modelAndView = new ModelAndView("role/save_success");
	roleService.save(role);
	return modelAndView;
}

对比下你的代码吧，看看问题出在哪？

controller方法代码

@RequestMapping(value = "form")
    public String form(Role role, Model model, HttpServletRequest request) {
        model.addAttribute("role", role);

        return "modules/sys/roleForm";

    }

@RequestMapping(value = { "save"})
    public String save(Role role) {
        System.out.println("-------------------------->"+role);
        return "redirect:/admin/sys/role";
    }

jsp页面的代码

<form:form id="inputForm" modelAttribute="role" action="${ctx}/admin/sys/role/save.htm" method="post" class="form-horizontal">

感觉没有什么问题，调试了半天也没发现有什么问题。。不清楚哪里不对了