I want to create a Java bean from the XML file which I will get as input at runtime. Can anyone please suggest me the generic way for doing the XML to Java bean conversion?
Typically java classes can be generated from XSD. So, if you do not have it yet you should first write it manually or generate from your XML sample. There are many tools that do this. I know for example XMLSpy But I believe that a lot of others exist.
Then you should generate your java classes. The are many ways to do this too. For example JAXB (as it was mentioned by #Chris Jester-Young) or Castor.
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Using Java to write xml strikes me as perhaps not the best match. Is this just because it's new and unfamiliar, perhaps?
Rather than generating JAXB source code from xml might it not be more flexible to work with xml files directly? What I mean is, cannot the middle-man be cut out?
If JAXB can generate source code for the class files to manipulate xml might there a tool which uses JAXB without creating concrete boiler-plate?
If there's simply a mis-match making this impossible please elaborate. Or, if it's simply out of reach, what are the obstacles?
It may seems that this issue is so common that it should be resolved, but after few hours of searching I wasn not been able to find a solution besides to write my own binder througth Java Reflection API. It would be nice if there would be some library that can bind XML to Java classes and do a validation with XSD file (with default values, etc.)
Any tips?
i would like to know how to parse xml file in java and convert results to javabean from it. Can anyone guide me thanks?
A really simple and convenient way: http://simple.sourceforge.net/
You can find many examples there for using it, too.
JAXB allows you to write an XSD to which your XML file should conform and then generate the java beans automatically. You don't need to hand-code the beans yourselves.
Check out the tutorial at http://docs.oracle.com/javase/tutorial/jaxb/intro/.
I'm a quite new to java world and I have a requirement of generating an .xml file from an .xsd file
I did some research and found that 'jaxb' could do it. And I found some example too, but the problem is, almost all the examples uses 'xjc' tool to do this. But I want a way to do this through my java code.
Os this possible?
if yes, I'm thinking something like this, from my java code
load the .xsd file
generate the .xml
save the .xml file
Can someone direct me to a good resource and or tell me if my thinking is wrong
I've had good experiences using XMLBeans, however I've always had the XSD available at compile time. It integrates nicely with Maven (plus potentially other build systems). The compilation produces a series of Java classes that can be used to construct an XML document that conforms to the XSD or process an XML file you've received.
You can potentially do some runtime processing of an XSD using the org.apache.xmlbeans.XmlBeans.compileXsd class, but I've never experimented with it. Just seen a reference from an FAQ.
I think the main problem is that to do it in a clean way you should have classes reflecting your xsd. Xsd defines a data model, so the important part is to recreate it with classes. If you want to do it dynamically it could be rather difficult. If you want to do it at compile time- jaxb is the way to go. There is very interesting article talking about problems related with parsing xml (it goes from a different perspective than you describe), but I think there is a wealth of knowledge to be learned from here:
http://elegantcode.com/2010/08/07/dont-parse-that-xml/
I am looking for a Java framework which can validate order of elements in XML against XSD. I have already tried JDK 5's javax.xml.Validate and popular article http://www.ibm.com/developerworks/xml/library/x-javaxmlvalidapi/index.html
But none of it gave me specific result.These implementation one way or another told me that xml is invalid but could not provide me specific error description.
maybe take a look at this page:
https://www.java-tips.org/java-ee-tips-100042/175-java-architecture-for-xml-binding/1833-what-is-new-in-jaxb-20.html
You can do nearly everything in XML with the JAXB