解组修改后的xml文件

Question

在我的java项目中，我需要解组一个xml文件才能获取对象列表。

解组工作得很好，但是当修改文件的内容时问题得到了解决。实际上，在这个项目中，我们可以通过点击“addButon”向该文件添加新的内容，但是当我想要再次解组同一个文件时（修改后），我只获得没有最后一个元素的旧对象列表（我只是添加到这个文件）。

我已经验证了磁盘上的物理xml文件，并且发现了我刚才添加的所有最新内容。另外我注意到，获得最后一个对象列表的唯一方法是关闭应用程序并重新打开它，这是不合适的。

这里是一块代码：

//classe1.java 

File iniFile = new File(proprietesPerle.getRepRef() + "referential.xml"); 

FileInputStream fs = = new FileInputStream(iniFile); 

ref = Referentiel.unmarshal(fs);  

TreeMap map = ReferentielUtil.getApplication(ref); 

... 


//classe2.java 

TreeMap map = new TreeMap(); 

List   listPL = app.getPl(); //this list is unmarshalled from the xml file 

ListIterator itpl = listPL.listIterator(); 

while (itpl.hasNext()) 
{ 

    Pl pl = (Pl)itpl.next(); 

    map.put(pl.getCode(), pl); 
} 

return map; 

... 

---

非常感谢你伊戈尔您的回复

In fact we select an app from a combobox, it's type is "Application" and this variable is stocked in a session. we use it like this: 

session.setAttribute("selectedApplication",selectedAppli); 
TreeMap mapp = ReferentielUtil.getPl(selectedAppli.getApp()); 

//Class ReferentielUtil.java 
public static TreeMap getPl(Application app) 
{ 
    logger.debug("getPl"); 
    logger.debug("passe 10"); 
    TreeMap map = new TreeMap(); 

    List listPL = app.getPl(); 
    ListIterator itpl = listPL.listIterator(); 
    while (itpl.hasNext()) 
    { 
     Pl pl = (Pl)itpl.next(); 

     map.put(pl.getCode(), pl); 
    } 
    return map; 
} 

inside Referentiel.unmarshal, you will find a code like this: 

public void unmarshal(Unmarshaller u) 
    throws UnmarshalException 
{ 

    XMLScanner xs = u.scanner(); 
    xs.takeStart("application"); 
    while (xs.atAttribute()) { 
     String an = xs.takeAttributeName(); 
     throw new InvalidAttributeException(an); 
    } 
    if (xs.atStart("code")) { 
     xs.takeStart("code"); 
     String s; 
     if (xs.atChars(XMLScanner.WS_COLLAPSE)) { 
      s = xs.takeChars(XMLScanner.WS_COLLAPSE); 
     } else { 
      s = ""; 
     } 
     try { 
      _Code = String.valueOf(s); 
     } catch (Exception x) { 
      throw new ConversionException("code", x); 
     } 
     xs.takeEnd("code"); 
    } 
    if (xs.atStart("libelle")) { 
     xs.takeStart("libelle"); 
     String s; 
     if (xs.atChars(XMLScanner.WS_COLLAPSE)) { 
      s = xs.takeChars(XMLScanner.WS_COLLAPSE); 
     } else { 
      s = ""; 
     } 
     try { 
      _Libelle = String.valueOf(s); 
     } catch (Exception x) { 
      throw new ConversionException("libelle", x); 
     } 
     xs.takeEnd("libelle"); 
    } 
    _TypeApplication = ((TypeApplication) u.unmarshal()); 
    if (xs.atStart("entite")) { 
     xs.takeStart("entite"); 
     String s; 
     if (xs.atChars(XMLScanner.WS_COLLAPSE)) { 
      s = xs.takeChars(XMLScanner.WS_COLLAPSE); 
     } else { 
      s = ""; 
     } 
     try { 
      _Entite = String.valueOf(s); 
     } catch (Exception x) { 
      throw new ConversionException("entite", x); 
     } 
     xs.takeEnd("entite"); 
    } 
    { 
     List l = PredicatedLists.create(this, pred_Pl, new ArrayList()); 
     while (xs.atStart("pl")) { 
      l.add(((Pl) u.unmarshal())); // the problem is here : unmarshal() dont gives the last element -------------- 
     } 
     _Pl = PredicatedLists.createInvalidating(this, pred_Pl, l); 
    } 
    xs.takeEnd("application"); 

} 

I noticed that in (while loop) we dont get the last element Pl which we want to add to the list "l" 

Please do you have any idea? 

Answer 1

是的，真的，就像你不关闭/平outputStream对象。尝试一下，它应该有所帮助。