java - XStream 单个集合中的多种节点类型

Question

我正在尝试反序列化这样的 XML 文档:

<rootelem>
    <elementType1 arg1="..." />
    <elementType1 arg1="..." />
    <elementType1 arg1="..." />
    <elementType2 argA="..." argB="..." />
    <elementType2 argA="..." argB="..." />
    <elementType2 argA="..." argB="..." />
</rootelem>

默认情况下XStream只能解析这样的形式:

<rootelem>
    <list1>
        <elementType1 arg1="..." />
        <elementType1 arg1="..." />
        <elementType1 arg1="..." />
    </list1>

    <list2>
        <elementType2 argA="..." argB="..." />
        <elementType2 argA="..." argB="..." />
        <elementType2 argA="..." argB="..." />
    </list>
</rootelem>

这是因为 XStream 使用下一种格式进行集合:

<collection>
    <elem .... />
    <elem .... />
    <elem .... />
</collection>

和框架标签是强制性的。集合只能包含单一类型的节点。那么如何解析这样的XML文档呢？现在我已经为此编写了自己的转换器，但我想知道还有其他方法吗？

Answer 1

我认为隐式集合是适合您的解决方案。

http://x-stream.github.io/alias-tutorial.html#implicit

这里是示例代码:

package com.thoughtworks.xstream;

import java.util.ArrayList;
import java.util.List;

public class Test {

    public static void main(String[] args) {

            Blog teamBlog = new Blog(new Author("Guilherme Silveira"));
            teamBlog.add(new Entry("first","My first blog entry."));
            teamBlog.add(new Entry("tutorial",
                    "Today we have developed a nice alias tutorial. Tell your friends! NOW!"));

            XStream xstream = new XStream();
            xstream.alias("blog", Blog.class);
            xstream.alias("entry", Entry.class);

            xstream.addImplicitCollection(Blog.class, "entries");

            System.out.println(xstream.toXML(teamBlog));
    }
}

结果:

<blog>
  <author>
     <name>Guilherme Silveira</name>
  </author>
  <entry>
     <title>first</title>
     <description>My first blog entry.</description>
  </entry>
  <entry>
     <title>tutorial</title>
     <description>
          Today we have developed a nice alias tutorial. Tell your friends! NOW!
     </description>
  </entry>
</blog>