springboot报错：Content type 'application/x-www-form-urlencoded;charset=UTF-8' not supported

控制层中，根据id删除用户是这样写的：

@PostMapping("/delete")
public ResultMsg delete(@RequestBody Map<String,Object> params){ 
	...... 
}

请求报错：Content type 'application/x-www-form-urlencoded;charset=UTF-8' not supported

解决方案1：

    @PostMapping("/delete")
    public ResultMsg delete(@RequestBody User user){
        int n = userService.delete(user.getId());
        if (n>0){
            System.out.println("删除数据成功，清除缓存");
            // 清除缓存
            redisTemplate.delete("users");
            return ResultMsg.success(ResultCode.SUCCESS);
        } else {
            return ResultMsg.fail(ResultCode.FAIL);
        }
    }

解决方案2：

    @PostMapping("/delete")
    public ResultMsg delete(@RequestParam Map<String,Object> params){
        Object o = params.get("id");
        if (o instanceof String){
            String string = (String)o;
            Integer integer = Integer.valueOf(string);
            int n = userService.delete(integer);
            if (n>0){
                System.out.println("删除数据成功，清除缓存");
                // 清除缓存
                redisTemplate.delete("users");
                return ResultMsg.success(ResultCode.SUCCESS);
            }
        }
        return ResultMsg.fail(ResultCode.FAIL);
    }