springmvc值的传递（从前台到后台）

//关于参数传递接受

有@RequestBody方法上这个标签的，前台的参数（ajax）同时采用属性驱动，模型驱动，传到后台，写在方法名上，只能传递一对像不能是list(所以ajax传递的参数data只能是{}),写在参数上可以是list（这是data可以是【{}{}】）,用【】要申明是复杂格式的json，详见下面。
这个标签方法return的就是返回回调函数的data

@RequestMapping(value = "/savemobile")
@RequestBody
    public int saveMobile(@RequestBody List<User> user ,@RequestParam(value = "yzm", required = false) String yzm) {
@RequestMapping(value = "/savemobile")//这中不可以
    public int saveMobile(@RequestBody List<User> user ,@RequestParam(value = "yzm", required = false) String yzm) {
@RequestMapping(value = "/savemobile")//这种可以
@RequestBody
    public int saveMobile(@RequestBody List<User> user ) {//这种可以
@RequestMapping(value = "/savemobile")
    @ResponseBody//这种可以
    public String saveMobile(@RequestParam(value = "yzm", required = false) String yzm , User user ) {

   @ResponseBody//卸载外面的时候里面的只能是单个实体
    public PageInfo<Role> queryPageSupplier(HttpSession session,
    @RequestParam(value = "pageNo", required = false) int pageNo,
                                            @RequestParam(value = "pageSize", required = false) int pageSize,
                                            Role role)




    @RequestMapping(value = "/savemobile")
    @ResponseBody
    public String saveMobile(@RequestParam(value = "yzm", required = false) String yzm , User user ) {
$.ajax({

            type: "post",
            url: "<%=webPath%>/system/users/savemobile.do",
            data: ndata,
            dataType: "json",
/////////////////////////////    contentType:"application/json",不用list之后这句去了【】是复杂格式标志
            success: function (data) {
                if (data = 1) {
                alert("绑定成功，谢谢！");
                } else if (data = 0) {
                    alert("操作失败，该记录可能已不存在。");
                } else if (data > 1) {
                    alert("错误，有多条记录被删除。");
                }
            },
            error: function (textStatus) {
                alert("数据加载失败!!!");
            }
});


========复杂格式json提交=========================
@RequestMapping(value = "/savetree")
    public String saveTree( @RequestBody List<MenuDto>  menuDtos, @RequestParam(value = "roleId", required = false) String roleId) {

$.ajax({
            type: "post",
            url: "<%=webPath%>/system/acount/savetree.do?roleId="+roleId,
            data: JSON.stringify(events),
            dataType: "json",
            contentType:"application/json"
           
        });


@RequestMapping(value = "/savecheck")
    @ResponseBody
    public String saveCheck(@RequestBody List<User> user) {//由于前台是【】不是{}
    System.out.println("111");
        return "redirect:index.do";
    }


======================================================