java - 更改方法名称会添加不需要的 XML block

Question

对于我的生活，我无法弄清楚为什么我的代码会发生这种情况。

我编写了一个 Java 程序来将 XML block 添加到现有的 XML 文件中。举例说明:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<bookList>
   <book>
     <author>Neil Strauss</author>
     <bookName>The Game</bookName>
   </book>
</bookList>

现在，我想在 bookList 中添加一本书。所以我创建了一个 Unmarshaller 并这样调用它:

BookMain.java:

    ArrayList<Book> bookList = new ArrayList<Book>();
    JAXBContext context = JAXBContext.newInstance(Bookstore.class);

    Unmarshaller um = context.createUnmarshaller();
    Bookstore bookstore2 = (Bookstore) um.unmarshal(new FileReader(
    "./bookstore.xml"));
    Book book3 = new Book();
    book3.setName("Test");
    book3.setAuthor("TestAuthor");

    bookstore2.getBooksList().add(book3);

    Marshaller map = context.createMarshaller();
    map.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
    map.marshal(bookstore2, System.out);

书店.java:

@XmlRootElement(name = "bookList")

public class Bookstore {


    // XmlElement sets the name of the entities
    @XmlElement(name = "book")
    private ArrayList<Book> bookList;

    public void setBookList(ArrayList<Book> bookList) {
        this.bookList = bookList;
    }

    public ArrayList<Book> getBooksList() {
        return bookList;
    }
}

这很好用。它在书单中添加一本书没问题。但是后来我将 setBookList 和 getBookList 这两个方法更改为 setBList 和 getBList，突然，输出如下所示:

<bookList>
    <book>
        <author>Neil Strauss</author>
        <bookName>The Game</bookName>
    </book>
    <book>
        <author>TestAuthor</author>
        <bookName>Test</bookName>
    </book>
    <BList>
        <author>Neil Strauss</author>
        <bookName>The Game</bookName>
    </BList>
    <BList>
        <author>TestAuthor</author>
        <bookName>Test</bookName>
    </BList>
</bookList>

为什么更改方法名称会添加这些不需要的 XML block ，我该如何修复它才能更改此方法名称而不会产生不良后果？

编辑这里是请求的Book.java

@XmlRootElement(name = "book")
// If you want you can define the order in which the fields are written
// Optional
@XmlType(propOrder = { "author", "name" })
public class Book {

    private String name;
    private String author;

    // If you like the variable name, e.g. "name", you can easily change this
    // name for your XML-Output:
    @XmlElement(name = "bookName")
    public String getName() {
        return name;
    }

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

    public String getAuthor() {
        return author;
    }

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

}

Answer 1

JAXB 默认为@XmlAcessorType(XmlAcessType.PUBLIC)。这意味着它将映射所有公共(public)访问器/字段以及带注释的字段。当字段名称与访问器匹配时，JAXB 会识别出它们是相关的。当您更改名称时，它没有。要解决此问题，您可以注释访问器或使用 XmlAccesssType.FIELD。