How do i Parsing xml
This how my customers xml is coming across and can not
change.
<month name="January">
<day>
<date>01</date>
<name>Thursday</name>
<time>12:03 PM</time>
<comment>It is a hot day</comment>
</day>
<day>
<date>05</date>
<name>Monday</name>
<time>09:28 AM</time>
<comment>Another hot day</comment>
</day>
</month>
The above data structure uses a new node for each bit of core
information. It is well laid out and very readable by humans,
however a better structure exists when using Flash. The data
structure below makes more use of the attributes feature, speeding
the parsing process up. It takes longer for Flash to read 6
separate nodes, than it does 6 attributes of a node. The data
structure below is suited better for use with Flash.
How do I get it formated like this?
<month name="January">
<day date="01" name="Thursday" time="12:03 PM" comment="It
is a hot day" />
<day date="05" name="Monday" time="09:28 AM"
comment="Another hot day" />
</month>
Hello again,
Sorry, I thought you wanted to know how to parse XML for this
structure
<month name="January">
<day date="01" name="Thursday" time="12:03 PM" comment="It
is a hot day" />
<day date="05" name="Monday" time="09:28 AM"
comment="Another hot day" />
</month>
This is the one that the code I wrote is using. I think
you're loading in the other one. Doesn't matter - I've included the
for loop for both structures below so that you can try it with
both.
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How do i parse XML tags specific to a particular parent tag ?
Hi,This the XML i have to parse.
<?xml version="1.0" encoding="UTF-8"?>
<?xml version="1.0" encoding="UTF-8"?>
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I am using dom for parsing elements.One of my parsing helper method is this :
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String textVal = null;
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In the above XML,i have created 2 beans which contains information contained in the 2 <flightinfo> tags and only part missing is how do i create the class information bean specific to each of the <flightinfo> tags.
Please let me know if any i have missed something.
Thank you for your consideration.punter wrote:
How do I store the information contained in <infoOnClasses> which is specific to each <flightinfo> tag?Huh? No it isn't. An infoOnClasses element contains a productClassDetail which has a serviceClass and an availabilityStatus. This structure is consistent.
So where exactly does the "specific to each <flightinfo> tag" come in? Or do you mean that each infoOnClasses belongs to a flightinfo? If so then your flightinfo "bean" would have an attribute which is a List of infoOnClasses beans.
And you do not, if you can avoid it, hand code XML binders any more... Have a look at XMLBeans (or similar).
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How do you store parsed XML data in an array
Hi, i am trying to complete a small program which implements the SAX parser to parse an XML file. My problem is that i am writing a custom class to store the parsed data into an array, and then make the array available to the main program via a simple method which returns the array. I know this must be very simple to do, but i seem to have developed a mental block with this part of the program. I can parse the data and print all the elements to the screen, but i just cant figure out how to store all the data elements into the array. I will post the class which is supposed to do this, and ask anyone out there if they know what i'm doing wrong, and also, if there is a more effeicient way of achieving this ( i expect there definitely is!! but i have never used the SAX parser before and am getting confused by the API docs on it!!) Any help very much appreciated.
Here is my attempt at coding the class to handle the parsed XML data
class Sink extends org.xml.sax.helpers.DefaultHandler
implements org.xml.sax.ContentHandler{
Customer[] customers = new Customer[20];
int count = 1;
int x = 0;
int tagCount = 0;
String name;
String custID;
String username;
String address;
String phoneNum;
public void startElement(String uri, String localName, String rawName, final org.xml.sax.Attributes attributes)throws org.xml.sax.SAXException{
//count the number of <name> tags in the XML file
if(rawName.equals("name")){
tagCount++;
public void characters(char[] ch, int start, int len){
//get the current string
String text = new String(ch, start, len);
String text1 = text.trim();
//there are 5 elements for each customer found in the XML file so when the count reaches 6
// i reset this to 1
if(count == 6){
count = count - 5;
if(text1.length()>0 && count == 1){
name = text1;
System.out.println(name);
}else{
if(text1.length()>0 && count == 2){
custID = text1;
System.out.println(custID);
}else{
if(text1.length()>0 && count == 3){
username = text1;
System.out.println(username);
}else{
if(text1.length()>0 && count == 4){
address = text1;
System.out.println(address);
}else{
if(text1.length()>0 && count == 5){
phoneNum = text1;
System.out.println(phoneNum);
//add data to the customer array
customers[x] = new Customer(name, custID, username, address, phoneNum);
// increment the array index counter
x = x+1;
}//end of if
}//end else
}//end else
}//end else
}//end else
}//end of characters method
public void endDocument(){
System.out.println("There are " + tagCount +
" <name> elements.");
}//end of class Sink
Before the end of this class i also need to make the array available to the calling program!!
Any help would be much appreciated
Thanks
IainOk, yer going about this all the wrong way. You shouldn't have to maintain a count of all the elements. Basically you are locking yourself into the XML tags not only all being there but are assuming they are all in the same order. What you should do is in your characters() method, put all of the characters into a string buffer. Then, in endElement() (which you dont use btw, you should) you grab the information that is in the string buffer and store it into your Customer object depending on what the tagName is.
Also, you should probably use a List to store all the Customer objects and not an single array, it's more dynamic and you arent locked into a set number of Customers.
I wont do it all for you, but I'll give you a good outline to use.
public class CustomerHandler extends DefaultHandler {
private java.util.List customerList; // List of Customer objects
private java.util.StringBuffer buf; // StringBuffer to store the string of characters between the start and end tags
private Customer customer; // Customer object that is initialized with each entry.
public CustomerHandler() {
customerList = new java.util.ArrayList(); // Initialize the List
buf = new java.util.StringBuffer(); // Initialize the string buffer
// Make your customer list available to other classes
public java.util.List getCustomerList() {
return customerList;
public void startElement(String nsURI, String sName, String tagName, Attributes attributes) throws SAXException {
// Clear the String Buffer
// If the tagName is "Customer" then create a new Customer object
public void characters(char[] ch, int start, int length) {
// append the characters into the string buffer
public void endElement(String nsURI, String sName, String tagName) throws SAXException {
// If the tagName is "Customer" add your customer object to the List
// Place the data from the String Buffer into a String
// Depending on the tagName, call the appropriate set method on your customer object
} -
How to parse XML to Java object... please help really stuck
Thank you for reading this email...
If I have a **DTD** like:
<!ELEMENT person (name, age)>
<!ATTLIST person
id ID #REQUIRED
>
<!ELEMENT name ((family, given) | (given, family))>
<!ELEMENT age (#PCDATA)>
<!ELEMENT family (#PCDATA)>
<!ELEMENT given (#PCDATA)>
the **XML** like:
<person id="a1">
<name>
<family> Yoshi </family>
<given> Samurai </given>
</name>
<age> 21 </age>
</person>
**** Could you help me to write a simple parser to parse my DTD and XML to Java object, and how can I use those objects... sorry if the problem is too basic, I am a beginner and very stuck... I am very confuse with SAXParserFactory, SAXParser, ParserAdapter and DOM has its own Factory and Parser, so confuse...
Thank you for your help, YoHi, Yo,
Thank you very much for your help. And I Wish you are there...I'm. And I plan to stay - It's sunny and warm here in Honolulu and the waves are up :)
A bit more question for dear people:
In the notes, it's mainly focus on JAXB,
1. Is that mean JAXB is most popular parser for
parsing XML into Java object? With me, definitely. There are essentially 3 technologies that allow you to parse XML documents:
1) "Callbacks" (e.g. SAX in JAXP): You write a class that overrides 3 methods that will be called i) whenever the parser encounters a start tag, ii) an end tag, or iii) PCDATA. Drawback: You have to figure out where the heck in the document hierarchy you are when such a callback happens, because the same method is called on EACH start tag and similarly for the end tag and the PCDATA. You have to create the objects and put them into your own data structure - it's very tedious, but you have complete control. (Well, more or less.)
2) "Tree" (e.g. DOM in JAXP, or it's better cousin JDOM): You call a parser that in one swoop creates an entire hierarchy that corresponds to the XML document. You don't get called on each tag as with SAX, you just get the root of the resulting tree. Drawback: All the nodes in the tree have the same type! You probably want to know which tags are in the document, don't you? Well, you'll have to traverse the tree and ask each node: What tag do you represent? And what are your attributes? (You get only strings in response even though your attributes often represent numbers.) Unless you want to display the tree - that's a nice application, you can do it as a tree model for JTree -, or otherwise don't care about the individual tags, DOM is not of much help, because you have to keep track where in the tree you are while you traverse it.
3) Enter JAXB (or Castor, or ...): You give it a grammar of the XML documents you want to parse, or "unmarshall" as the fashion dictates to call it. (Actually the name isn't that bad, because "parsing" focuses on the input text while "unmarshalling" focuses on the objects you get, even though I'd reason that it should be marshalling that converts into objects and unmarshalling that converts objects to something else, and not vice versa but that's just my opinion.) The JAXB compiler creates a bunch of source files each with one (or now more) class(es) (and now interfaces) that correspond to the elements/tags of your grammar. (Now "compiler" is a true jevel of a misnomer, try to explain to students that after they run the "compiler", they still need to compile the sources the "compiler" generated with the real Java compiler!). Ok, you've got these sources compiled. Now you call one single method, unmarshall() and as a result you get the root node of the hierarchy that corresponds to the XML document. Sounds like DOM, but it's much better - the objects in the resulting tree don't have all the same type, but their type depends on the tag they represent. E.g if there is the tag <ball-game> then there will be an object of type myPackage.BallGame in your data structure. It gets better, if there is <score> inside <ball-game> and you have an object ballGame (of type BallGame) that you can simply call ballGame.getScore() and you get an object of type myPackage.Score. In other words, the child tags become properties of the parent object. Even better, the attributes become properties, too, so as far as your program is concerned there is no difference whether the property value was originally a tag or an attribute. On top of that, you can tell in your schema that the property has an int value - or another primitive type (that's like that in 1.0, in the early release you'll have to do it in the additional xjs file). So this is a very natural way to explore the data structure of the XML document. Of course there are drawbacks, but they are minor: daunting complexity and, as a consequence, very steep learning curve, documentation that leaves much to reader's phantasy - read trial and error - (the user's guide is too simplicistic and the examples too primitive, e.g. they don't even tell you how to make a schema where a tag has only attributes) and reference manual that has ~200 pages full of technicalities and you have to look with magnifying glas for the really usefull stuff, huge number of generated classes, some of which you may not need at all (and in 1.0 the number has doubled because each class has an accompanying interface), etc., etc. But overall, all that pales compared to the drastically improved efficiency of the programmer's efforts, i.e. your time. The time you'll spend learning the intricacies is well spent, you'll learn it once and then it will shorten your programming time all the time you use it. It's like C and Java, Java is order of magnitude more complex, but you'd probably never be sorry you gave up C.
Of course the above essay leaves out lots and lots of detail, but I think that it touches the most important points.
A word about JAXB 1.0 vs. Early Release (EA) version. If you have time, definitively learn 1.0, they are quite different and the main advantage is that the schema combines all the info that you had to formulate in the DTD and in the xjs file when using the EA version. I suggested EA was because you had a DTD already, but in retrospect, you better start from scratch with 1.0. The concepts in 1.0 are here to stay and once your surmounted the learning curve, you'll be glad that you don't have to switch concepts.
When parser job is done,
what kind of Java Object we will get? (String,
InputStream or ...)See above, typically it's an object whose type is defined as a class (and interface in 1.0) within the sources that JABX generates. Or it can be a String or one of the primitive types - you tell the "compiler" in the schema (xjs file in EA) what you want!
2. If we want to use JAXB, we have to contain a
XJS-file? Something like:In EA, yes. In 1.0 no - it's all in the schema.
I am very new to XML, is there any simpler way to get
around them? It has already take me 4 days to find a
simple parser which give it XML and DTD, then return
to me Java objects ... I mean if that kind of parser
exists....It'll take you probably magnitude longer that that to get really familiar with JAXB, but believe me it's worth it. You'll save countless days if not weeks once you'll start developing serious software with it. How long did it take you to learn Java and it's main APIs? You'll either invest the time learning how to use the software others have written, or you invest it writing it yourself. I'll take the former any time. But it's only my opinion...
Jan -
Hi All
I want to parse xml document which contains more then one occurrence of particular element.
I want to get some sub elements of that element and want take action on the basis of param tag inside this sub element.
for example :
<appender name="first" class="tempclass...">
<param name="File" value="d:/test.log" />
<filter class="">
<param name="LevelToMatch" value="sdsds" />
<param name="OtherParam" value="bla bla" />
</filter>
</appender>
<appender name="second" class="tempclass...">
</appender>
my problem is how do i differentiate all "<appender>".
I want values of "File" and "LevelToMatch" for each declaired appender
and depending upon the values i want to take some decision.
I dont know XML much
I am using DOM parser.
Please help me ASAP.
Thanks in advance,hi,
i hope u need to get the attribute values, right...
if yes..create the DocumentBuilderFactory for the xml the uisng buildFactory method u will get the parser...from parser u cann go for anything....
if u r not clearly, reply where do u struck...
bye,
suryakant. -
How to parse xml data into java component
hi
everybody.
i am new with XML, and i am trying to parse xml data into a java application.
can anybody guide me how to do it.
the following is my file.
//MyLogin.java
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
class MyLogin extends JFrame implements ActionListener
JFrame loginframe;
JLabel labelname;
JLabel labelpassword;
JTextField textname;
JPasswordField textpassword;
JButton okbutton;
String name = "";
FileOutputStream out;
PrintStream p;
Date date;
GregorianCalendar gcal;
GridBagLayout gl;
GridBagConstraints gbc;
public MyLogin()
loginframe = new JFrame("Login");
gl = new GridBagLayout();
gbc = new GridBagConstraints();
labelname = new JLabel("User");
labelpassword = new JLabel("Password");
textname = new JTextField("",9);
textpassword = new JPasswordField(5);
okbutton = new JButton("OK");
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 5;
gl.setConstraints(labelname,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 2;
gbc.gridy = 5;
gl.setConstraints(textname,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 10;
gl.setConstraints(labelpassword,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 2;
gbc.gridy = 10;
gl.setConstraints(textpassword,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 15;
gl.setConstraints(okbutton,gbc);
Container contentpane = getContentPane();
loginframe.setContentPane(contentpane);
contentpane.setLayout(gl);
contentpane.add(labelname);
contentpane.add(labelpassword);
contentpane.add(textname);
contentpane.add(textpassword);
contentpane.add(okbutton);
okbutton.addActionListener(this);
loginframe.setSize(300,300);
loginframe.setVisible(true);
public static void main(String a[])
new MyLogin();
public void reset()
textname.setText("");
textpassword.setText("");
public void run()
try
String text = textname.getText();
String blank="";
if(text.equals(blank))
System.out.println("First Enter a UserName");
else
if(text != blank)
date = new Date();
gcal = new GregorianCalendar();
gcal.setTime(date);
out = new FileOutputStream("log.txt",true);
p = new PrintStream( out );
name = textname.getText();
String entry = "UserName:- " + name + " Logged in:- " + gcal.get(Calendar.HOUR) + ":" + gcal.get(Calendar.MINUTE) + " Date:- " + gcal.get(Calendar.DATE) + "/" + gcal.get(Calendar.MONTH) + "/" + gcal.get(Calendar.YEAR);
p.println(entry);
System.out.println("Record Saved");
reset();
p.close();
catch (IOException e)
System.err.println("Error writing to file");
public void actionPerformed(ActionEvent ae)
String str = ae.getActionCommand();
if(str.equals("OK"))
run();
//loginframe.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
}hi, thanks for ur reply.
i visited that url, i was able to know much about xml.
so now my requirement is DOM.
but i dont know how to code in my existing file.
means i want to know what to link all my textfield to xml file.
can u please help me out. i am confused.
waiting for ur reply -
I have some problems when I try to parse xml with the kXML parser. My xml doc looks like this:
<?xml version="1.0" encoding="utf-8" ?>
- <dsGreenRoom>
- <Rooms>
- <RoomsInfo>
<ID>1</ID>
<Name>Rum 101</Name>
<Type>Dubbelrum</Type>
<NumberOfBeds>2</NumberOfBeds>
<Rate>980,00</Rate>
<Currency>SEK</Currency>
<Description>Ett genomtrevligt rum</Description>
</RoomsInfo>
- <RoomsInfo>
<ID>2</ID>
<Name>Mellanrummet</Name>
<Type>Enkelrum</Type>
<NumberOfBeds>1</NumberOfBeds>
<Rate>650,00</Rate>
<Currency>SEK</Currency>
<Description>Ett litet tr?ngt rum i mitten</Description>
</RoomsInfo>
- <RoomsInfo>
<ID>3</ID>
<Name>Rum 102</Name>
<Type>Flerb?ddsrum</Type>
<NumberOfBeds>3</NumberOfBeds>
<Rate>1250,00</Rate>
<Currency>SEK</Currency>
<Description>Ett ?nnu trevligare rum</Description>
</RoomsInfo>
</Rooms>
</dsGreenRoom>
And my code looks like this:
KXmlParser parser = new KXmlParser();
parser.setInput(is, null);
Document doc = new Document();
doc.parse(parser);
int child_count = root.getChildCount();
System.out.println("child = " + child_count + "\n");
for (int i=0; i < child_count; i++) {
if (root.getType(i) == Node.ELEMENT) {
Element kid = root.getElement(i);
System.out.println("kid = " + kid.getName());
int babies = kid.getChildCount();
System.out.println("babies = " + babies);
for (int j=0; j < babies; j++) {
if (kid.getType(j) == Node.ELEMENT) {
Element room = kid.getElement(j);
System.out.println("room.getType() = " + room.getType(j));
if (room.getName().equals("ID")) {
System.out.println("elName.getName() = " + room.getName());
System.out.println("elName.geText() = " + room.getText(j));
else if (room.getName().equals("Name")) {
System.out.println("elName.getName() = " + room.getName());
System.out.println("elName.geText() = " + room.getText(j));
} // end for(int j...)
} // end if (root.getType(i)
} //for (int i...)
The problem is that I don't know how to get the values out of the tags:
<ID>1</ID>
<Name>Rum 101</Name>
<Type>Dubbelrum</Type>
<NumberOfBeds>2</NumberOfBeds>
<Rate>980,00</Rate>
<Currency>SEK</Currency>
<Description>Ett genomtrevligt rum</Description>
It's no problem to get the value from the firsts i.e. <ID> but I don't know how to get the value from <Name> ... <Description>. I have looked att examples but I don't understand how to do this. Can someone please help me =)okay, sorry, I only read the half of your problem ;-)
You can read the content using the getText(0) method. the 0 indicates the number of the children which you want to get. That is always a 0 because you have always just one text-children in your text-tags. The content is again a children of type text!
hth
Kay -
How to parse XML for internal table
hi guys, I would like to know how to parse xml for an internal table. I explain myself.
Let's say you have a purchase order form where you have header data & items data. In my interactive form, the user can change the purchase order quantity at the item level. When I received back the pdf completed by mail, I need to parse the xml and get the po qty that has been entered.
This is how I do to get header data from my form
lr_ixml_node = lr_ixml_document->find_from_name( name = ''EBELN ).
lv_ebeln = lr_ixml_node->get_value( ).
How do we do to get the table body??
Should I used the same method (find_from_name) and passing the depth parameter inside a do/enddo?
thanks
Alexandre GiguereAlexandre,
Here is an example. Suppose your internal table is called 'ITEMS'.
lr_node = lr_document->find_from_name('ITEMS').
lv_num_of_children = lr_node->num_children( ).
lr_nodechild = lr_node->get_first_child( ).
do lv_num_of_children times.
lv_num_of_attributes = lr_nodechild->num_children( ).
lr_childchild = lr_nodechild->get_first_child( ).
do lv_num_of_attributes times.
lv_value = lr_childchild->get_value( ).
case sy-index.
when 1.
wa_item-field1 = lv_value
when 2.
wa_item-field2 = lv_value.
endcase.
lr_childchild = lr_childchild->get_next( ).
enddo.
append wa_item to lt_item.
lr_nodechild = lr_nodechild->get_next( ).
enddo. -
How to parse XML against XSD,DTD, etc.. locally (no internet connection) ?
i've searched on how to parse xml against xsd,dtd,etc.. without the needs of internet connection..
but unfortunately, only the xsd file can be set locally and still there needs the internet connection for the other features, properties.
XML: GML file input from gui
XSD: input from gui
javax.xml
package demo;
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import javax.xml.XMLConstants;
import javax.xml.transform.Source;
import javax.xml.transform.stream.StreamSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.Validator;
import org.xml.sax.SAXException;
public class Sample1WithJavaxXML {
public static void main(String[] args) {
URL schemaFile = null;
try {
//schemaFile = new URL("http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd");
File file0 = new File("AppSchema-C01-v1_0.xsd");
schemaFile = new URL(file0.toURI().toString());
} catch (MalformedURLException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
//Source xmlFile = new StreamSource(new File("web.xml"));
Source xmlFile = new StreamSource(new File("C01.xml"));
SchemaFactory schemaFactory = SchemaFactory
.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
//File file1 = new File("XMLSchema.dtd");
//SchemaFactory schemaFactory = SchemaFactory
//.newInstance("javax.xml.validation.SchemaFactory:XMLSchema.dtd");
Schema schema = null;
try {
schema = schemaFactory.newSchema(schemaFile);
} catch (SAXException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
Validator validator = schema.newValidator();
try {
validator.validate(xmlFile);
System.out.println(xmlFile.getSystemId() + " is valid");
} catch (SAXException e) {
System.out.println(xmlFile.getSystemId() + " is NOT valid");
System.out.println("Reason: " + e.getLocalizedMessage());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}Xerces
package demo;
import java.io.File;
import java.util.Date;
import org.apache.xerces.parsers.DOMParser;
public class SchemaTest {
private String xmlFile = "";
private String xsdFile = "";
public SchemaTest(String xmlFile, String xsdFile) {
this.xmlFile = xmlFile;
this.xsdFile = xsdFile;
public static void main (String args[]) {
File file0 = new File("AppSchema-C01-v1_0.xsd");
String xsd = file0.toURI().toString();
SchemaTest testXml = new SchemaTest("C01.xml",xsd);
testXml.process();
public void process() {
File docFile = new File(xmlFile);
DOMParser parser = new DOMParser();
try {
parser.setFeature("http://xml.org/sax/features/validation", true);
parser.setFeature("http://apache.org/xml/features/validation/schema", true);
parser.setProperty("http://apache.org/xml/properties/schema/external-noNamespaceSchemaLocation",
xsdFile);
ErrorChecker errors = new ErrorChecker();
parser.setErrorHandler(errors);
System.out.println(new Date().toString() + " START");
parser.parse(docFile.toString());
} catch (Exception e) {
System.out.print("Problem parsing the file.");
System.out.println("Error: " + e);
System.out.println(new Date().toString() + " ERROR");
return;
System.out.println(new Date().toString() + " END");
}Thanks a lot Sir DrClap..
I tried to use and implement the org.w3c.dom.ls.LSResourceResolver Interface which is based on the SAX2 EntityResolver.
please give comments the way I implement it. Here's the code:
LSResourceResolver Implementation
import org.w3c.dom.ls.LSInput;
import org.w3c.dom.ls.LSResourceResolver;
import abc.xml.XsdConstant.Path.DTD;
import abc.xml.XsdConstant.Path.XSD;
public class LSResourceResolverImpl implements LSResourceResolver {
public LSResourceResolverImpl() {
* {@inheritDoc}
@Override
public LSInput resolveResource(String type, String namespaceURI, String publicId, String systemId, String baseURI) {
ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
LSInput input = new LSInputImpl(publicId, systemId, baseURI);
if ("http://www.w3.org/2001/xml.xsd".equals(systemId)) {
input.setByteStream(classLoader.getResourceAsStream(XSD.XML));
} else if (XsdConstant.PUBLIC_ID_XMLSCHEMA.equals(publicId)) {
input.setByteStream(classLoader.getResourceAsStream(DTD.XML_SCHEMA));
} else if (XsdConstant.PUBLIC_ID_DATATYPES.equals(publicId)) {
input.setByteStream(classLoader.getResourceAsStream(DTD.DATATYPES));
return input;
}I also implement org.w3c.dom.ls.LSInput
import java.io.InputStream;
import java.io.Reader;
import org.w3c.dom.ls.LSInput;
public class LSInputImpl implements LSInput {
private String publicId;
private String systemId;
private String baseURI;
private InputStream byteStream;
private String stringData;
public LSInputImpl(String publicId, String systemId, String baseURI) {
super();
this.publicId = publicId;
this.systemId = systemId;
this.baseURI = baseURI;
//getters & setters
}Then, here's the usage/application:
I create XMLChecker class (SchemaFactory implementation is Xerces)
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.xml.XMLConstants;
import javax.xml.stream.FactoryConfigurationError;
import javax.xml.transform.Source;
import javax.xml.transform.stream.StreamSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.Validator;
import org.xml.sax.ErrorHandler;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import abc.xml.XsdConstant.Path.XSD;
public class XMLChecker {
private ErrorMessage errorMessage = new ErrorMessage();
public boolean validate(String filePath){
final ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
List<Source> schemas = new ArrayList<Source>();
schemas.add(new StreamSource(classLoader.getResourceAsStream(XSD.XML_SCHEMA)));
schemas.add(new StreamSource(classLoader.getResourceAsStream(XSD.XLINKS)));
schemas.add(new StreamSource(classLoader.getResourceAsStream("abc/xml/AppSchema.xsd")));
SchemaFactory schemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
schemaFactory.setResourceResolver(new LSResourceResolverImpl());
try {
Schema schema = schemaFactory.newSchema(schemas.toArray(new Source[schemas.size()]));
Validator validator = schema.newValidator();
validator.setErrorHandler(new ErrorHandler() {
@Override
public void error(SAXParseException e) throws SAXException {
errorMessage.setErrorMessage(e.getMessage());
errorMessage.setLineNumber(e.getLineNumber());
errorMessage.setColumnNumber(e.getLineNumber());
throw e;
@Override
public void fatalError(SAXParseException e) throws SAXException {
errorMessage.setErrorMessage(e.getMessage());
errorMessage.setLineNumber(e.getLineNumber());
errorMessage.setColumnNumber(e.getLineNumber());
throw e;
@Override
public void warning(SAXParseException e) throws SAXException {
errorMessage.setErrorMessage(e.getMessage());
errorMessage.setLineNumber(e.getLineNumber());
errorMessage.setColumnNumber(e.getLineNumber());
throw e;
StreamSource source = new StreamSource(new File(filePath));
validator.validate(source);
} catch (SAXParseException e) {
return false;
} catch (SAXException e) {
errorMessage.setErrorMessage(e.getMessage());
return false;
} catch (FactoryConfigurationError e) {
errorMessage.setErrorMessage(e.getMessage());
return false;
} catch (IOException e) {
errorMessage.setErrorMessage(e.getMessage());
return false;
return true;
public ErrorMessage getErrorMessage() {
return errorMessage;
}Edited by: erossy on Aug 31, 2010 1:56 AM -
How to Parse XML with SAX and Retrieving the Information?
Hiya!
I have written this code in one of my classes:
/**Parse XML File**/
SAXParserFactory factory = SAXParserFactory.newInstance();
GameContentHandler gameCH = new GameContentHandler();
try
SAXParser saxParser = factory.newSAXParser();
saxParser.parse(recentFiles[0], gameCH);
catch(javax.xml.parsers.ParserConfigurationException e)
e.printStackTrace();
catch(java.io.IOException e)
e.printStackTrace();
catch(org.xml.sax.SAXException e)
e.printStackTrace();
/**Parse XML File**/
games = gameCH.getGames();And here is the content handler:
import java.util.ArrayList;
import org.xml.sax.*;
import org.xml.sax.helpers.DefaultHandler;
class GameContentHandler extends DefaultHandler
private ArrayList<Game> games = new ArrayList<Game>();
public void startDocument()
System.out.println("Start document.");
public void endDocument()
System.out.println("End document.");
public void startElement(String namespaceURI, String localName, String qualifiedName, Attributes atts) throws SAXException
public void endElement(String namespaceURI, String localName, String qualifiedName) throws SAXException
public void characters(char[] ch, int start, int length) throws SAXException
/**for (int i = start; i < start+length; i++)
System.out.print(ch);
public ArrayList<Game> getGames()
return games;
}And here is the xml i am trying to parse:<?xml version="1.0" encoding="ISO-8859-1" standalone="yes"?>
<Database>
<Name></Name>
<Description></Description>
<CurrentGameID></CurrentGameID>
<Game>
<gameID></gameID>
<name></name>
<publisher></publisher>
<platform></platform>
<type></type>
<subtype></subtype>
<genre></genre>
<serial></serial>
<prodReg></prodReg>
<expantionFor></expantionFor>
<relYear></relYear>
<expantion></expantion>
<picPath></picPath>
<notes></notes>
<discType></discType>
<owner></owner>
<location></location>
<borrower></borrower>
<numDiscs></numDiscs>
<discSize></discSize>
<locFrom></locFrom>
<locTo></locTo>
<onLoan></onLoan>
<borrowed></borrowed>
<manual></manual>
<update></update>
<mods></mods>
<guide></guide>
<walkthrough></walkthrough>
<cheats></cheats>
<savegame></savegame>
<completed></completed>
</Game>
</Database>I have been trying for ages and just can't get the content handler class to extract a gameID and instantiate a Game to add to my ArrayList! How do I extract the information from my file?
I have tried so many things in the startElement() method that I can't actually remember what I've tried and what I haven't! If you need to know, the Game class instantiates with asnew Game(int gameID)and the rest of the variables are public.
Please help someone...OK, how's this?
public void startElement(String namespaceURI, String localName, String qualifiedName, Attributes atts) throws SAXException
current = "";
public void endElement(String namespaceURI, String localName, String qualifiedName) throws SAXException
try
if(qualifiedName.equals("Game") || qualifiedName.equals("Database"))
{return;}
else if(qualifiedName.equals("gameID"))
{games.add(new Game(Integer.parseInt(current)));}
else if(qualifiedName.equals("name"))
{games.get(games.size()-1).name = current;}
else if(qualifiedName.equals("publisher"))
{games.get(games.size()-1).publisher = current;}
etc...
else
{System.out.println("ERROR - Qualified Name found in xml that does not exist as databse field: " + qualifiedName);}
catch (Exception e) {} //Ignore
public void characters(char[] ch, int start, int length) throws SAXException
current += new String(ch, start, length);
}
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