利用XStream将List<String>转为xml后指定String的别名

	public class Test {
	    public List<String> tags = new ArrayList<String>();
	    public List<String> notags = new ArrayList<String>();
	    public Test(String tag, String tag2) {
	        tags.add(tag); tags.add(tag2);
	        notags.add(tag); notags.add(tag2);
	    }
	    public static void main(String[] args) {
	        Test test = new Test("foo", "bar");
	        XStream xstream = new XStream();

	        ClassAliasingMapper mapper = new ClassAliasingMapper(xstream.getMapper());
	        mapper.addClassAlias("tag", String.class);
	        xstream.registerLocalConverter(
	            Test.class,
	            "tags",
	            new CollectionConverter(mapper)
	        );

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

打印结果：
  <tags>
    <tag>foo</tag>
    <tag>bar</tag>
  </tags>
  <notags>
    <string>foo</string>
    <string>bar</string>
  </notags>