Question

我是Jersey REST的新手，我正在尝试构建一个示例库系统。我创建了BookResource.java，我希望它在浏览器中显示以下输出：

{
 “book” : {
  “isbn” : 1,
  “title” : “Programming Amazon EC2”,
  “publication-date” : “2/11/2011”,
  “language” : “eng”,
  “num-pages”: 185,
  “status” : “available”,
  “authors” : [
      { “rel”: “view-author”, “href”: “/books/1/authors/1”, “method”: “GET” },
      { “rel”: “view-author”, “href”: “/books/1/authors/2”, “method”: “GET” }
  ]
  },
 "links" : []
}

My Book.java如下：

public class Book 
{
    private long isbn;
    private String title;

    @JsonProperty("publication-date")
    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "MM/dd/yyyy")
    private String date;

    private String language;
    private String status;

    @JsonProperty("num-pages")
    private Integer num_pages;

    @JsonProperty("authors")
    private ArrayList<Author> authorList;

    public Book() {}
    //getters and setters
}

Author.java

public class Author
{
    @JsonProperty("name")
    private String name;

    public Author() {}

    public String getAuthor() {
        return name;
    }

    public void setAuthor(String newAuthor){
        this.name = newAuthor;
    }
}

BookRepository.java

public class BookRepository implements BookRepositoryInterface {
public ArrayList<Author> getAuthorByIsbn(Long isbn)
    {
        Book newBook = bookInMemoryMap.get(isbn);
        ArrayList<Author> authorList = newBook.getAuthor();
        return authorList;
    }
}

但是我在浏览器上的实际GET响应显示为：

{
    "book": {
        "isbn": 1,
        "title": "Programming EC2r",
        "language": "eng",
        "status": "available",
        "author": [{
            "name": "auth1",
            "author": "auth1"
        }, {
            "name": "auth2",
            "author": "auth2"
        }],
        "num_Pages": 185,
        "publication-date": "2/11/2011",
        "num-pages": 185,
        "authors": [{
            "name": "auth1",
            "author": "auth1"
        }, {
            "name": "auth2",
            "author": "auth2"
        }]
    }

BookResource.java

public class BookResource 
{
    @GET
    @Path("/{isbn}")
    @Timed(name = "view-book")
    public BookDto getBookByIsbn(@PathParam("isbn") LongParam isbn) 
    {
      Book book = bookRepository.getBookByISBN(isbn.get());
      BookDto bookResponse = new BookDto(book); 
      // add more links
      bookResponse.addLink(new LinkDto("view-book", "/books/" + book.getIsbn(),"GET"));     
      return bookResponse;
    }
}

我为author和num_pages获取了多个值，似乎无法正确显示输出。我试过@JsonPropertyOrder，但它没有用。此外，在调试中我检查了Book资源是否正确存储和检索。它只是显示多个值的JSON输出。我怎么能纠正这个？另外，如何根据需要显示“作者”的链接？

Answer 1

感谢@SvetlinZarev，通过将 @JsonProperty仅放在getter方法上，我能够解决显示多个值的问题。

@JsonProperty("name")
public String getAuthor() {
    return name;
}

它工作得很好，它显示我的正确输出如下：

{
    "book": {
        "isbn": 1,
        "title": "Programming EC2r",
        "publication-date": "2/11/2011",
        "language": "eng",
        "num-pages": 185,
        "status": "available",
        "authors": [{
            "name": "auth1"
        }, {
            "name": "auth2"
        }]
    },
    "links": []
}

再次感谢大家对我这样的新手的及时回复！：）

使用Jersey REST进行GET时，JSON输出显示不正确

1 个答案: