20190408 XStream解析List

XStream解析List

使用的JavaBean

• 普通JavaBean

public class Book {
	private String name;

	public Book() {
	}

	public Book(String name) {
		this.name = name;
	}

	public String getName() {
		return name;
	}

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

• 包含List的JavaBean

public class BookBag {
	private int price;

	private String name;

	private Date date;

	private List<Book> books;

	public int getPrice() {
		return price;
	}

	public void setPrice(int price) {
		this.price = price;
	}

	public String getName() {
		return name;
	}

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

	public Date getDate() {
		return date;
	}

	public void setDate(Date date) {
		this.date = date;
	}

	public List<Book> getBooks() {
		return books;
	}

	public void setBooks(List<Book> books) {
		this.books = books;
	}

}

开始测试

1. 初始版

@Test
	public void test1() {
		BookBag bookBag = new BookBag();
		bookBag.setPrice(100);
		bookBag.setName("张三");
		bookBag.setDate(new Date());

		Book book1 = new Book("西游记");
		Book book2 = new Book("红楼梦");

		ArrayList<Book> books = new ArrayList<>();
		books.add(book1);
		books.add(book2);

		bookBag.setBooks(books);

		XStream xStream = new XStream();

		String s = xStream.toXML(bookBag);
		System.out.println(s);

	}

结果：

<test.hwj.bean.BookBag>
  <price>100</price>
  <name>张三</name>
  <date>2019-04-08 07:38:18.854 UTC</date>
  <books>
    <test.hwj.bean.Book>
      <name>西游记</name>
    </test.hwj.bean.Book>
    <test.hwj.bean.Book>
      <name>红楼梦</name>
    </test.hwj.bean.Book>
  </books>
</test.hwj.bean.BookBag>

2. 为JavaBean加上注释，@XStreamAlias

修改代码：

@XStreamAlias("BookBag")
public class BookBag {

@XStreamAlias("Book")
public class Book {

// 开启注释
xStream.autodetectAnnotations(true);

结果：

<BookBag>
  <price>100</price>
  <name>张三</name>
  <date>2019-04-08 07:45:41.187 UTC</date>
  <books>
    <Book>
      <name>西游记</name>
    </Book>
    <Book>
      <name>红楼梦</name>
    </Book>
  </books>
</BookBag>

3. 消除List外的大标签

修改代码：

@XStreamImplicit
private List<Book> books;

结果：

<BookBag>
  <price>100</price>
  <name>张三</name>
  <date>2019-04-08 07:47:47.432 UTC</date>
  <Book>
    <name>西游记</name>
  </Book>
  <Book>
    <name>红楼梦</name>
  </Book>
</BookBag>

4. 对Date进行处理

修改代码：

// 注册转换器
xStream.registerConverter(new DateConverter("yyyy-MM-dd HH:mm:ss", null));

结果：

<BookBag>
  <price>100</price>
  <name>张三</name>
  <date>2019-04-08 07:51:30</date>
  <Book>
    <name>西游记</name>
  </Book>
  <Book>
    <name>红楼梦</name>
  </Book>
</BookBag>