xstream是个好东西。对于配置文件的读取很方便。在mybog中我就用到了。不过今天打算用yupoo的api来做相册。发现xstream对于xmlnode的attribute解析支持不是那么的好。对于这种节点格式的非常的简单
<result> <page>1</page> <pages>1</pages> <perpage>100</perpage> <total>19</total> <photos> <photo> <id>ff8080810fc8ac78010fd3f158d40a52</id> <owner>ff8080810f1a387b010f1a83d6530dfc</owner> <title>Gmail-2</title> <host>4</host> <dir>20061230</dir> <filename>231905_1463411198</filename> </photo> </photos></result>简单的alias一下就可以读到值了
File file = new File("src/test/java/com/jdkcn/test/result.xml");BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(file), "UTF-8"));XStream stream = new XStream();stream.alias("result", YupooResult.class);stream.alias("photo",YupooPhoto.class);YupooResult result = (YupooResult)stream.fromXML(reader); 可是Yupoo的api返回的xmlrpc的结果是这样的 <result page="1" pages="1" perpage="100" total="19"> <photos> <photo id="ff8080810fc8ac78010fd3f158d40a52" owner="ff8080810f1a387b010f1a83d6530dfc" title="Gmail-2" host="4" dir="20061230" filename="231905_1463411198" /> </photos></result>这样就load不到值了。没法去mailist里面找答案，果然有人问。
Hello, I am not sure about the subject but here is what I needed help for: XML: <field name="value">I am a Field.</field> I have already tried several structures and nothing seem to work. Is this possible for XStream? :) How is the Java class form to support this? Thanks!有人回答是看Converter的文档。果然找到答案了。自己写一个converter就可以了。下面是我的converter package com.jdkcn.xstream;import java.util.ArrayList;import java.util.List;import com.jdkcn.yupoo.YupooPhoto;import com.jdkcn.yupoo.YupooResult;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;/** * @author <a href="mailto:rory.cn@gmail.com">somebody</a> * @since Jan 16, 2007 6:12:35 PM * @version $Id YupooResultConverter.java$*/public class YupooResultConverter implements Converter {/* (non-Javadoc) * @see com.thoughtworks.xstream.converters.Converter#marshal(java.lang.Object, com.thoughtworks.xstream.io.HierarchicalStreamWriter, com.thoughtworks.xstream.converters.MarshallingContext)*/public void marshal(Object obj, HierarchicalStreamWriter writer, MarshallingContext context) {// FIXME unfinish. }/* (non-Javadoc) * @see com.thoughtworks.xstream.converters.Converter#unmarshal(com.thoughtworks.xstream.io.HierarchicalStreamReader, com.thoughtworks.xstream.converters.UnmarshallingContext)*/public Object unmarshal(HierarchicalStreamReader reader, UnmarshallingContext context) { YupooResult result = new YupooResult(); result.setPage(new Integer(reader.getAttribute("page"))); result.setPages(new Integer(reader.getAttribute("pages"))); result.setPerpage(new Integer(reader.getAttribute("perpage"))); result.setTotal(new Integer(reader.getAttribute("total"))); reader.moveDown(); List<YupooPhoto> photos = new ArrayList<YupooPhoto>();while(reader.hasMoreChildren()) { reader.moveDown(); YupooPhoto photo = new YupooPhoto(); photo.setDir(reader.getAttribute("dir")); photo.setFilename(reader.getAttribute("filename")); photo.setHost(reader.getAttribute("host")); photo.setId(reader.getAttribute("id")); photo.setOwner(reader.getAttribute("owner")); photo.setTitle(reader.getAttribute("title")); photos.add(photo); reader.moveUp(); } result.setPhotos(photos);return result; }/* (non-Javadoc) * @see com.thoughtworks.xstream.converters.ConverterMatcher#canConvert(java.lang.Class)*/public boolean canConvert(Class clazz) {return clazz.equals(YupooResult.class); }} 然后调用的地方修改一下就ok了。 XStream stream = new XStream();stream.registerConverter( new YupooResultConverter());stream.alias( " result " , YupooResult. class ); 以后大家一定要注意啊。顺序问题也是很重要的。转载于:https://www.cnblogs.com/pelephone/articles/java-xstream-xml-node.html
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