We Keep Coding

Create XML on JAVA

I need to create an XML on JAVA but for multi fields on one element:
<cities>
<city_insert city_id="123" city_name="São Paulo" />
<city_insert city_id="456" city_name="Rio de Janeiro"/>
</cities>
As you can see on the example above, the element city_insert need to have city_id, and city_name , one element can have multiples fields.
How this can be done on Java?
I've searched for DOM and JDOM parsers but still don't know how this works.
Thank you!

Refer to this question for creating an XML using DOM parser.
Create XML file using java
In order to create an attribute (which you mentioned as fields), call setAttribute() method.
nodelist = doc.getElementsByTagName("city_insert");
for (Element element : nodelist) {
Element parent = element.getParentNode()
parent.setAttribute("city_id", "123");
parent.setAttribute("city_name", "São Paulo");
}

I allways do this things using jaxb
First, generate an xsd from your xml (there are many free online generators on the net)
For your xml, an online generated xsd look as follows:
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="cities">
<xs:complexType>
<xs:sequence>
<xs:element name="city_insert" maxOccurs="unbounded" minOccurs="0">
<xs:complexType>
<xs:simpleContent>
<xs:extension base="xs:string">
<xs:attribute type="xs:short" name="city_id" use="optional"/>
<xs:attribute type="xs:string" name="city_name" use="optional"/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
Then, using jaxb (many IDE's like Eclipse have an easy way of doing it) generate jaxb classes from an xsd:
Click finish, then this is java console output:
parsing a schema...
compiling a schema...
com\erax\xml\test\xsd\Cities.java
com\erax\xml\test\xsd\ObjectFactory.java
And the generated classes:
Then just use jaxb marshalling to serialize and deserialize

Java XML Create Fragment/Elements Without Namespace

I am trying to construct an XML document using org.w3c.dom.Document to create some XML for another existing tool. The problem I am having is that the tool seems to have the XML namespaces in a strange way. How can I replicate this using the Java API's?
<ns1:myroot xmlns:ns1="http://foo.com/ns1/">
<ns2:bar xmlns:ns2="http://foo.com/xml/bar/">
<ns2:bar_thing>abc</ns2:bar_thing>
</ns2:bar>
<ns3:data xmlns:ns3="http://foo.com/xml/special-ns">
<!--These are not namespaced for some reason. If I use the ns3 prefix, or
use a default xmls="...", the tool fails to load the document, saying the
elements have invalid values.
-->
<a>Element without namespace</a>
<b>
<bi>1</bi>
<bii>2</bii>
</b>
</ns3:data>
</ns1:myroot>
I can build most of the document easily with createElementNS and setAttributeNS. However I can't get the ns3:data contents to be correct.
Trying to use the non-namespace createElement still left an xmlns="http://foo.com/xml/special-ns"> on my a and b elements, as did using createElementNS with an empty namespace, and obviously a non-empty namespace puts them in a namespace.
The schema for http://foo.com/xml/special-ns has a bunch of declarations like these below, not sure what the tns thing is about, but otherwise does not seem special (although I am not 100% sure the tool actually does anything with the XSD and I don't have access to the source).
<xs:schema version="1.0" targetNamespace="http://foo.com/xml/special-ns">
<!--Bunch of xs:element such as this-->
<xs:element name="data" type="tns:data" />
<!--types declared after-->
<xs:complexType name="data">
<xs:sequence>
<xs:element name="a" type="tns:aDataObj" minOccurs="0"/>
<xs:element name="b" type="tns:bDataObj" minOccurs="0"/>
</xs:sequence>
</xs:complexType>
<xs:simpleType name="aDataObj">
<xs:restriction base="xs:string">
<xs:pattern value="[a-zA-Z0-9 ]+" />
</xs:restriction>
</xs:simpleType>
<xs:complexType name="bDataObj">
<xs:sequence>
<xs:element name="bi" type="xs:string"/>
<xs:element name="bii" type="xs:string"/>
</xs:sequence>
</xs:complexType>
</xs:schema>

JaxB xjc generated pojos contains blank namespaces

I'm using xjc from the command line to generate POJOs from an XSD. Here's the command I run:
"%java_home%\bin\xjc" -p com.etc.etc.etc.etc ConsolidatedAlert.xsd
For some of the POJOs generated, the properties in the POJO come back like the following:
#XmlElement(name = "UnparsedTelephone", namespace="")
protected String unparsedTelephone;
As far as I can tell, I don't specify these elements any differently than others that don't have the "namespace" attribute.
Here's the relevant sections of the XSD:
Type declaration:
<xs:complexType name="TelephoneType">
<xs:choice>
<xs:element name="UnparsedTelephone" type="xs:string"/>
<xs:element name="ParsedTelephone" type="ParsedTelephoneType"/>
</xs:choice>
</xs:complexType>
Element declaration:
<xs:element name="Telephone" type="TelephoneType"/>
Where "Telephone" is used:
<xs:complexType name="CompanyContactType">
<xs:sequence>
<xs:element ref="Telephone"/>
</xs:sequence>
</xs:complexType>
Where "CompanyContact" is used:
<xs:complexType name="AmountType">
<xs:sequence>
<xs:element ref="CompanyContact" minOccurs="0" />
<xs:element name="TriggerAmount" type="xs:string"/>
</xs:sequence>
</xs:complexType>
I can simply remove the namespace="" from each POJO, but that can take a bit, and I'd like a better understanding about why it's happening in the first place.
Also, this is about 8 XSDs all linked together. They all have the same targetNamespace and xmlns in the schema definition, but some of them have elementFormDefault="unqualified" and others have elementFormDefault="qualified". Could this be the cause of the problem?
Any ideas?

Namespace Qualification & XML Schema
When elementFormDefault="qualified" all the elements corresponding to this XML Schema will be namespace qualified. When elementFormDefault="unqualified" only global (top level) elements will be namespace qualified.
Namespace Qualification & JAXB
JAXB allows the namespace qualification to be set at the package level using #XmlSchema. Since you have multiple schemas and an undisclosed number of generated packages it's very possible XJC generated "" for namespace to override the default qualification to match the schema rules.

Is there a java API to generate xml with an inline schema definition

I want to generate the xml file that holds its schema as well as the xml data contain using java,as per my knowledge it is possible in C# .NET.Is it possible in java???
My XML file should be look like as given below.
<transaction>
<xs:schema id="transaction" xmlns="" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
<xs:element name="transaction" msdata:IsDataSet="true" msdata:UseCurrentLocale="true">
<xs:complexType>
<xs:choice minOccurs="0" maxOccurs="unbounded">
<xs:element name="id">
<xs:complexType>
<xs:sequence>
<xs:element name="in" type="xs:string" minOccurs="0" />
<xs:element name="sn" type="xs:string" minOccurs="0" />
<xs:element name="book" type="xs:string" minOccurs="0" />
<xs:element name="author" type="xs:string" minOccurs="0" />
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="data">
<xs:complexType>
<xs:sequence>
<xs:element name="dateTime" type="xs:dateTime" minOccurs="0" />
<xs:element name="key" type="xs:string" minOccurs="0" />
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="productData">
<xs:complexType>
<xs:sequence>
<xs:element name="dateTime" type="xs:dateTime" minOccurs="0" />
<xs:element name="key" type="xs:string" minOccurs="0" />
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:choice>
</xs:complexType>
</xs:element>
</xs:schema>
<id>
<in>computer</in>
<sn>1234567</sn>
<book>JAVA</book>
<author>klen</author>
</id>
<data>
<dateTime>2011-06-24T17:08:36.3727674+05:30</dateTime>
<key>Err</key>
</data>
</transaction>
In my given example my xml file contain data as well as schema I need to generate this type of file from schema using java.
I can only create the xml part using jaxb and main part of my code is look like as
Marshaller jaxbMarshaller = jaxbContext.createMarshaller();
jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT,true);
jaxbMarshaller.setProperty(Marshaller.JAXB_FRAGMENT,true);
jaxbMarshaller.marshal(transaction, file);
jaxbMarshaller.marshal(transaction, System.out);
but I can not add the inline xml schema part with my xml file.
#jtahlborn ok I will try to dig it up thanks for your help.I have another question I heard about that stax is better than dom to xml write,so I want to use stax is it possible to set namespace and other thing. I have another question is it true that jaxb is only use to convert xml to xml schema(un marshaling) and xml schema to xml(marshaling) and if I need to write xml file then we need to use jaxb[DOM,STAX(stream based reading writing),SAX(stream only reading)] .

You would:
create a DOM document from your schema (e.g. parse the schema file)
create a new DOM document
add the root node to your new DOM document (e.g. "transaction")
append the schema document from step 1. as the first child of the "transaction" element
append the actual document data as subsequent children of the "transaction" element
Alternately, if you want to use JAXB to generate the "main" xml output, then you can:
populate jaxb models (created from the schema)
marshal the jaxb models to a DOM document
create a DOM document from your schema (e.g. parse the schema file)
insert the schema document from step 3. as the first child of the "transaction" element in your DOM document
(with a few jaxb config tricks, you could probably get your Transaction model to have an Element "schema" property, and then you could set that property from the parsed schema doc and marshal the whole model at one time)

order of parsed elements is lost in XMLBeans

I have a XML structure somewhat like this:
<root>
<a/>
<b/>
<b/>
<a/>
<a/>
</root>
My XSD looks like this:
<xs:element name="root">
<xs:complexType>
<xs:sequence>
<xs:choice maxOccurs="unbounded">
<xs:element ref="a"/>
<xs:element ref="b"/>
</xs:choice>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="a" type="xs:string" />
<xs:element name="b" type="xs:string" />
I.e. i have a random sequence of two different sub tags.
Using XMLBeans i get a Root object with access methods:
getAArray(), getBArray()
And here's my problem:
The tags are grouped by name and the original order (a,b,b,a,a) is lost.
But i need to know the order of those elements.
What is the best / easiest way to do that with XMLBeans?

Try
xml.selectPath("./*")

ok i got it.
the selectPath method of XmlObject returns an array of objects so it gives the sequence.