@RequestMapping("/book3")
  public Book book3() {
      Book book = new Book();
      book.setName("红楼梦");
      ResponseEntity<Book> responseEntity = restTemplate.postForEntity
      ("http://HELLO-SERVICE/getbook2", book, Book.class);
      return responseEntity.getBody();
  }

  @RequestMapping(value = "/getbook2", method = RequestMethod.POST)
  public Book book2(@RequestBody Book book) {
      System.out.println(book.getName());
      book.setPrice(33);
      book.setAuthor("曹雪芹");
      book.setPublisher("人民文学出版社");
      return book;
  }