XStream！
更新：我按照评论的要求添加了编组部分。
import com.thoughtworks.xstream.XStream;import com.thoughtworks.xstream.converters.Converter;import com.thoughtworks.xstream.converters.MarshallingContext;import com.thoughtworks.xstream.converters.UnmarshallingContext;import com.thoughtworks.xstream.io.HierarchicalStreamReader;import com.thoughtworks.xstream.io.HierarchicalStreamWriter;import java.util.AbstractMap;import java.util.HashMap;import java.util.Map;public class Test { public static void main(String[] args) { Map<String,String> map = new HashMap<String,String>(); map.put("name","chris"); map.put("island","faranga"); XStream magicApi = new XStream(); magicApi.registerConverter(new MapEntryConverter()); magicApi.alias("root", Map.class); String xml = magicApi.toXML(map); System.out.println("Result of tweaked XStream toXml()"); System.out.println(xml); Map<String, String> extractedMap = (Map<String, String>) magicApi.fromXML(xml); assert extractedMap.get("name").equals("chris"); assert extractedMap.get("island").equals("faranga"); } public static class MapEntryConverter implements Converter { public boolean canConvert(Class clazz) { return AbstractMap.class.isAssignableFrom(clazz); } public void marshal(Object value, HierarchicalStreamWriter writer, MarshallingContext context) { AbstractMap map = (AbstractMap) value; for (Object obj : map.entrySet()) { Map.Entry entry = (Map.Entry) obj; writer.startNode(entry.getKey().toString()); Object val = entry.getValue(); if ( null != val ) { writer.setValue(val.toString()); } writer.endNode(); } } public Object unmarshal(HierarchicalStreamReader reader, UnmarshallingContext context) { Map<String, String> map = new HashMap<String, String>(); while(reader.hasMoreChildren()) { reader.moveDown(); String key = reader.getNodeName(); // nodeName aka element's name String value = reader.getValue(); map.put(key, value); reader.moveUp(); } return map; } }}
