springboot项目-前台往后台传递json数据

1、json数据对应实体类，用实体类接收

----------------------------前台----------------------------------

$.ajax({
    type:"POST",
    url:"/monster/updateMonster",
    contentType: "application/json",
    data:JSON.stringify(monster1),
    success:function(data){
        let arraydata = data
        if (arraydata == "" || arraydata == undefined) {
            alert("更新失败，请联系管理员！")
        } else {
            alert("更新成功!")
            window.location.href = "/monster/monsterList";
            window.location.reload()
            $("#edit").css("display",'none')
        }

    }
});
-------------------------------后台-------------------------------

@RequestMapping(value="/updateMonster")
@ResponseBody
String updateMonster(@RequestBody Monster monster){
    System.out.println("monster"+monster);
    monsterService.updateMonster(monster);
    return "success";
}
2、json数据包含较多数据，用Map接收

----------------------------前台----------------------------------

$.ajax({
    type:"POST",
    url:"/task/addTask",
    contentType: "application/json",
    dataType: "json",
    data:JSON.stringify(info),
    success:function(data){
        let arraydata = data
        if (arraydata == "" || arraydata == undefined) {
            alert("更新失败，请联系管理员！")
        } else {
            alert("更新成功!")
            window.location.href = "/monster/monsterList";
            window.location.reload()
            $("#edit").css("display",'none')
        }

    }
});

-------------------------------后台-------------------------------

@RequestMapping("/addTask")
String addTask(@RequestBody Map<String,Object> info){
    System.out.println("bug"+info);
    return null;
}