启动server端

type Server struct {
    proto.UnimplementedHelloServer
}
func (s *Server) Hello(ctx context.Context, in *proto.HelloRequest) (*proto.HelloResponse,
    error) {
    return &proto.HelloResponse{
        Reply: in.Name + " I'm fine!",
    }, nil
}
func main() {
    // 1.新建一个serve
    s := grpc.NewServer()
    // 2.注册服务
    proto.RegisterHelloServer(s, &Server{})
    // 3. 监听端口
    listener, err := net.Listen("tcp", ":8080")
    if err != nil {
        panic("failed to listen: " + err.Error())
    }
    _ = s.Serve(listener)
}

使用client端调用

func main() {
    // 1.建立连接
    conn, err := grpc.Dial(":8080", grpc.WithInsecure())
    if err != nil {
        panic(err)
    }
    // 2.defer关闭连接
    defer conn.Close()
    // 3.创建client
    client := proto.NewHelloClient(conn)
    // 4.调用方法
    res, _ := client.Hello(context.Background(), &proto.HelloRequest{
        Name: "Chan",
        Age:  19,
        Courses: []string{
            "golang",
        },
    })
    fmt.Println("res", res)
}