以下是一个使用AWS CloudFormation创建路由表的示例模板：

AWSTemplateFormatVersion: '2010-09-09'
Resources:
  MyVPC:
    Type: AWS::EC2::VPC
    Properties:
      CidrBlock: 10.0.0.0/16
  MySubnet:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref MyVPC
      CidrBlock: 10.0.0.0/24
  MyInternetGateway:
    Type: AWS::EC2::InternetGateway
  MyGatewayAttachment:
    Type: AWS::EC2::VPCGatewayAttachment
    Properties:
      VpcId: !Ref MyVPC
      InternetGatewayId: !Ref MyInternetGateway
  MyRouteTable:
    Type: AWS::EC2::RouteTable
    Properties:
      VpcId: !Ref MyVPC
  MyRoute:
    Type: AWS::EC2::Route
    DependsOn: MyGatewayAttachment
    Properties:
      RouteTableId: !Ref MyRouteTable
      DestinationCidrBlock: 0.0.0.0/0
      GatewayId: !Ref MyInternetGateway
  MySubnetRouteTableAssociation:
    Type: AWS::EC2::SubnetRouteTableAssociation
    Properties:
      SubnetId: !Ref MySubnet
      RouteTableId: !Ref MyRouteTable

这个模板定义了一个VPC、一个子网、一个互联网网关、一个路由表和一个路由。它将路由表与子网关联，并将默认路由指向互联网网关。

要使用此模板，您可以使用AWS CloudFormation控制台或AWS CLI来部署堆栈。