如何避免 com.thoughtworks.xstream.io.StreamException: 反序列化时无法创建 XmlPullParser？
How to avoid com.thoughtworks.xstream.io.StreamException: Cannot create XmlPullParser while deseriliazation?
反序列化 xml 时出现异常"Exception in thread "main" com.thoughtworks.xstream.io.StreamException: 无法创建 XmlPullParser"。我添加了以下依赖项
xmlpull_1_0_5.jar
xpp3_min-1.1.4.jar
xstream-1.4.8.jar
测试代码：
import java.util.AbstractMap;
import java.util.HashMap;
import java.util.Map;
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;
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);
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;
}
}
}
我是否有一些依赖性。对此的任何帮助将不胜感激。
我添加了 xpp3_min-1.1.4c.jar 来代替 xpp3_min-1.1.4.jar。我的程序开始工作了
堆栈跟踪中未报告的根本问题是 xstream 1.4.8
中缺少资源
附上1.4.9源码（奇怪的是1.4.8源码没有），debug才能检测到
从未显示的真正错误是
caused by: org.xmlpull.v1.XmlPullParserException: resource not found: /META-INF/services/org.xmlpull.v1.XmlPullParserFactory make sure that parser implementing XmlPull API is available; nested exception is:
org.xmlpull.v1.XmlPullParserException: resource not found: /META-INF/services/org.xmlpull.v1.XmlPullParserFactory make sure that parser implementing XmlPull API is available
at org.xmlpull.v1.XmlPullParserFactory.newInstance(XmlPullParserFactory.java:278)
at org.xmlpull.v1.XmlPullParserFactory.newInstance(XmlPullParserFactory.java:259)
at com.thoughtworks.xstream.io.xml.XppDriver.createParser(XppDriver.java:57)
at com.thoughtworks.xstream.io.xml.AbstractXppDriver.createReader(AbstractXppDriver.java:54)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1061)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1052)
at tudelft.mmi.pn.duo.core.DUOModel.loadFromXml(DUOModel.java:289)
at tudelft.mmi.pn.duo.core.DUOModel.getNewDUOModel(DUOModel.java:182)
at domaineditor.extduomodel.ExtDuoModel.<init>(ExtDuoModel.java:56)
at domaineditor.actions.OpenFile.actionPerformed(OpenFile.java:34)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:833)
at com.apple.laf.AquaMenuItemUI.doClick(AquaMenuItemUI.java:157)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:877)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
at java.awt.Component.processMouseEvent(Component.java:6533)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6298)
at java.awt.Container.processEvent(Container.java:2236)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2294)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
at java.awt.Container.dispatchEventImpl(Container.java:2280)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access0(EventQueue.java:97)
at java.awt.EventQueue.run(EventQueue.java:709)
at java.awt.EventQueue.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
at java.awt.EventQueue.run(EventQueue.java:731)
at java.awt.EventQueue.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
真正的潜在问题似乎是这个（已知）问题
这个问题让我很头疼。我已经解决了使用：
XStream xstream = new XStream(new DomDriver()); // does not require XPP3 library
XStream xstream = new XStream(new StaxDriver()); // does not require XPP3 library starting with Java 6
如果问题仍然存在，请尝试导入这些
<dependency>
<groupId>com.thoughtworks.xstream</groupId>
<artifactId>xstream</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>xmlpull</groupId>
<artifactId>xmlpull</artifactId>
<version>1.1.3.1</version>
</dependency>
<dependency>
<groupId>xpp3</groupId>
<artifactId>xpp3_min</ artifactId>
<version>1.1.4c</version>
</dependency>
参考文献：
反序列化 xml 时出现异常"Exception in thread "main" com.thoughtworks.xstream.io.StreamException: 无法创建 XmlPullParser"。我添加了以下依赖项
xmlpull_1_0_5.jar
xpp3_min-1.1.4.jar
xstream-1.4.8.jar
测试代码：
import java.util.AbstractMap;
import java.util.HashMap;
import java.util.Map;
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;
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);
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;
}
}
}
我是否有一些依赖性。对此的任何帮助将不胜感激。
我添加了 xpp3_min-1.1.4c.jar 来代替 xpp3_min-1.1.4.jar。我的程序开始工作了
堆栈跟踪中未报告的根本问题是 xstream 1.4.8
中缺少资源附上1.4.9源码（奇怪的是1.4.8源码没有），debug才能检测到
从未显示的真正错误是
caused by: org.xmlpull.v1.XmlPullParserException: resource not found: /META-INF/services/org.xmlpull.v1.XmlPullParserFactory make sure that parser implementing XmlPull API is available; nested exception is:
org.xmlpull.v1.XmlPullParserException: resource not found: /META-INF/services/org.xmlpull.v1.XmlPullParserFactory make sure that parser implementing XmlPull API is available
at org.xmlpull.v1.XmlPullParserFactory.newInstance(XmlPullParserFactory.java:278)
at org.xmlpull.v1.XmlPullParserFactory.newInstance(XmlPullParserFactory.java:259)
at com.thoughtworks.xstream.io.xml.XppDriver.createParser(XppDriver.java:57)
at com.thoughtworks.xstream.io.xml.AbstractXppDriver.createReader(AbstractXppDriver.java:54)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1061)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1052)
at tudelft.mmi.pn.duo.core.DUOModel.loadFromXml(DUOModel.java:289)
at tudelft.mmi.pn.duo.core.DUOModel.getNewDUOModel(DUOModel.java:182)
at domaineditor.extduomodel.ExtDuoModel.<init>(ExtDuoModel.java:56)
at domaineditor.actions.OpenFile.actionPerformed(OpenFile.java:34)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:833)
at com.apple.laf.AquaMenuItemUI.doClick(AquaMenuItemUI.java:157)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:877)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
at java.awt.Component.processMouseEvent(Component.java:6533)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6298)
at java.awt.Container.processEvent(Container.java:2236)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2294)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
at java.awt.Container.dispatchEventImpl(Container.java:2280)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access0(EventQueue.java:97)
at java.awt.EventQueue.run(EventQueue.java:709)
at java.awt.EventQueue.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
at java.awt.EventQueue.run(EventQueue.java:731)
at java.awt.EventQueue.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
真正的潜在问题似乎是这个（已知）问题
这个问题让我很头疼。我已经解决了使用：
XStream xstream = new XStream(new DomDriver()); // does not require XPP3 library
XStream xstream = new XStream(new StaxDriver()); // does not require XPP3 library starting with Java 6
如果问题仍然存在，请尝试导入这些
<dependency>
<groupId>com.thoughtworks.xstream</groupId>
<artifactId>xstream</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>xmlpull</groupId>
<artifactId>xmlpull</artifactId>
<version>1.1.3.1</version>
</dependency>
<dependency>
<groupId>xpp3</groupId>
<artifactId>xpp3_min</ artifactId>
<version>1.1.4c</version>
</dependency>
参考文献：