XML serialization in Java

Question

What is the Java analogue of  NET s XML serialization

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public static String genXmlTag String tagName  String innerXml  String properties         return String format   lt  s  s gt  s lt   s gt    tagName  properties  innerXml  tagName      public static String genXmlTag String tagName  String innerXml         return genXmlTag tagName  innerXml          public static  lt T gt  String serializeXML List lt T gt  list        String result           if  list size    gt  0                T tmp   list get 0           String clsName   tmp getClass   getName            String   splitCls   clsName split                 clsName   splitCls splitCls length - 1           Field   fields   tmp getClass   getFields             for  T t   list                        String row                   try                   for  Field f   fields                                        Object value   f get t                       row    genXmlTag f getName    value    null        value toString                                     catch  IllegalAccessException e                    e printStackTrace                              row   genXmlTag clsName  row                result    row                       result   genXmlTag  root   result       return result

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XMLBeans works great if you have a schema for your XML   It creates Java objects for the schema and creates easy to use parse methods

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Worth mentioning that since version 1 4  Java had the classes java beans XMLEncoder and java beans XMLDecoder  These classes perform XML encoding which is at least very comparable to XML Serialization and in some circumstances might do the trick for you    If your class sticks to the JavaBeans specification for its getters and setters  this method is straightforward to use and you don t need a schema  With the following caveats    As with normal Java serialization   coding and decoding run over a InputStream and OutputStream the process uses the familar writeObject and readObject methods  In contrast to normal Java serialization   the encoding but also decoding causes constructors and initializers to be invoked encoding and decoding work regardless if your class implements Serializable or not transient modifiers are not taken into account works only for public classes  that have public constructors    For example  take the following declaration   public class NPair     public NPair         int number1   0    int number2   0    public void setNumber1 int value    number1   value     public int getNumber1     return number1      public void setNumber2 int value    number2   value      public int getNumber2    return number2       Executing this code   NPair fe   new NPair    fe setNumber1 12   fe setNumber2 13   FileOutputStream fos1   new FileOutputStream  d   ser xml    java beans XMLEncoder xe1   new java beans XMLEncoder fos1   xe1 writeObject fe   xe1 close      Would result in the following file    lt  xml version  1 0  encoding  UTF-8   gt   lt java version  1 7 0 02  class  java beans XMLDecoder  gt    lt object class  NPair  gt     lt void property  number1  gt      lt int gt 12 lt  int gt     lt  void gt     lt void property  number2  gt      lt int gt 13 lt  int gt     lt  void gt    lt  object gt   lt  java gt

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Don t forget JiBX

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Usually I use jaxb or XMLBeans if I need to create objects serializable to XML  Now  I can see that XStream might be very useful as it s nonintrusive and has really simple api  I ll play with it soon and probably use it  The only drawback I noticed is that I can t create object s id on my own for cross referencing     Barak Schiller Thanks for posting link to XStream

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XStream is pretty good at serializing object to XML without much configuration and money   it s under BSD license    We used it in one of our project to replace the plain old java-serialization and it worked almost out of the box

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if you want a structured solution  like ORM  then JAXB2 is a good solution   If you want a serialization like DOT NET then you could use Long Term Persistence of JavaBeans Components  The choice depends on use of serialization

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JAXB is part of JDK standard edition version 1 6   So it is FREE and no extra libraries to download and manage  A simple example can be found here   XStream seems to be dead  Last update was on Dec 6 2008  Simple seems as easy and simpler as JAXB but I could not find any licensing information to evaluate it for enterprise use

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2008 Answer The  Official  Java API for this is now JAXB - Java API for XML Binding  See Tutorial by Oracle  The reference implementation lives at http   jaxb java net   2018 Update  Note that the Java EE and CORBA Modules are deprecated in SE in JDK9 and to be removed from SE in JDK11  Therefore  to use JAXB it will either need to be in your existing enterprise class environment bundled by your e g  app server  or you will need to bring it in manually

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If you re talking about automatic XML serialization of objects  check out Castor      Castor is an Open Source data binding framework for Java tm   It s the shortest path between Java objects  XML documents and relational tables  Castor provides Java-to-XML binding  Java-to-SQL persistence  and more

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Simple XML Serialization  Project  You may want to look at the Simple XML Serialization project  It is the closest thing I ve found to the System Xml Serialization in  Net

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