标签：alt 最新版 reader roc jdk cep version rgs sdn
| com.thoughtworks.xstream.converters.ConversionException: Cannot construct ClassXXX as it does not have a no-args constructor : Cannot construct yourpackage.yourclass as it does not have a no-args constructor |
搜了一下才发现是版本的问题：
我用的是JDK7+XStream1.3.1
你可以换回JDK1.6或者升级XStream到最新版本。
参考：http://stackoverflow.com/questions/7966817/xstream-unmarshalling-type-specified-in-xml-not-visible
复制过来：
I got to the bottom of it - turns out xstream should handle that xml (it doesn‘t need a no-args constructor), the issue arose because I was using jdk 7 with an older version of xstream (1.3.1). See here http://code.google.com/p/pitestrunner/issues/detail?id=4. Moving back to jdk 6 fixed the issue (for various reasons i can‘t upgrade).
Before I realised that I did write a converter that worked for RandomAccessSubList if anyone needs it:
public class RandomAccessSubListConverter extends CollectionConverter {
public RandomAccessSubListConverter(Mapper mapper) {
super(mapper);
}
@Override
public boolean canConvert(Class arg0) {
return arg0.getName().equals("java.util.RandomAccessSubList");
}
@Override
public Object unmarshal(HierarchicalStreamReader reader,
UnmarshallingContext context) {
reader.moveDown();
ArrayList arrayList = new ArrayList();
populateCollection(reader, context, arrayList);
reader.moveUp();
return arrayList;
}
Thanks to anyone who was looking into for me!
我选择用最新的版本来解决，然后就遇到了第二个问题：
| java.lang.NoClassDefFoundError: org/xmlpull/v1/XmlPullParserFactory |
在初始化你的XStream的时候，在构造函数里面传入入：new DomDriver()
参考：http://blog.csdn.net/chenallen1025/article/details/8030552
复制过来：
1.抛出的异常信息如下：
2.原因：
应该改成：
XStream xstream=new XStream(new DomDriver()); //注意：不是new Xstream(); 否则报上面的错
xstream.processAnnotations(PersonBean.class); //如果是用注解的方式，这句不能少
PersonBean person=(PersonBean)xstream.fromXML(xmlStr);
System.out.println("person=firstname=="+person.getFirstName());
return person;
标签：alt 最新版 reader roc jdk cep version rgs sdn
原文地址：http://www.cnblogs.com/zhangsongren/p/7263718.html
