使用 XStream 从 arraylist 编写 XML

Question

我有一个类Alm_datos，有一个数组列表，里面有一些员工：

public class Alm_datos  extends InputSource{
static ArrayList<Empleado> listaEmpleados = new ArrayList<>();

另一个类，用于使用 xml 写入文件

公共类 Xstream {

Alm_datos alm = new Alm_datos();
public void xstreamSerializar() throws FileNotFoundException{
XStream xs = new XStream();
xs.alias("EmpleadoXS", Empleado.class);
xs.toXML(alm.listaEmpleados , new leOutputStream("EmpleadosXS.xml"));
}//END METODO
}//END CLASS

但这并不好：S

Exception in thread "main" java.lang.NoClassDefFoundError: org/xmlpull/v1/XmlPullParserException
at com.thoughtworks.xstream.XStream.<init>(XStream.java:369)
at empleadosaleatorio.Xstream.xstreamSerializar(Xstream.java:18)
at empleadosaleatorio.EmpleadosAleatorio.menu(EmpleadosAleatorio.java:150)
at empleadosaleatorio.EmpleadosAleatorio.main(EmpleadosAleatorio.java:17)
Caused by: java.lang.ClassNotFoundException: org.xmlpull.v1.XmlPullParserException
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:338)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 4 more

Answer 1

你有一个依赖问题。你在使用Maven吗？ 也许您缺少的 XMLPULL 库

<dependency> <groupId>xmlpull</groupId> <artifactId>xmlpull</artifactId> <version>1.1.3.1</version> </dependency>