I have an XML file like this one:
<?xml version="1.0" encoding="UTF-8"?>
<Article>
<ArticleTitle>Java-SAX Tutorial</ArticleTitle>
<Author>
<FamilyName>Yong</FamilyName>
<GivenName>Mook</GivenName>
<GivenName>Kim</GivenName>
<nickname>mkyong</nickname>
<salary>100000</salary>
</Author>
<Author>
<FamilyName>Low</FamilyName>
<GivenName>Yin</GivenName>
<GivenName>Fong</GivenName>
<nickname>fong fong</nickname>
<salary>200000</salary>
</Author>
</Article>
I have tried the example in mkyong's tutorial here and I can retrieve data perfectly from it using SAX, it gives me:
Article Title : Java-SAX Tutorial
Given Name : Kim
Given Name : Mook
Family Name : Yong
Given Name : Yin
Given Name : Fong
Family Name : Low
But I want it to give me something like this:
Article Title : Java-SAX Tutorial
Author : Kim Mook Yong
Author : Yin Fong Low
In other terms, I would like to retrieve some of the child nodes of the node Author, not all of them, put them in a string variable and display them.
This is the class I use in order to parse the Authors with the modification I have tried to do:
public class ReadAuthors {
public void parse(String filePath) {
try {
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser saxParser = factory.newSAXParser();
DefaultHandler handler = new DefaultHandler() {
boolean bFamilyName = false;
boolean bGivenName = false;
@Override
public void startElement(String uri, String localName,String qName,
Attributes attributes) throws SAXException {
if (qName.equalsIgnoreCase("FamilyName")) {
bFamilyName = true;
}
if (qName.equalsIgnoreCase("GivenName")) {
bGivenName = true;
}
}
@Override
public void endElement(String uri, String localName,
String qName) throws SAXException {
}
@Override
public void characters(char ch[], int start, int length) throws SAXException {
String fullName = "";
String familyName = "";
String givenName ="";
if (bFamilyName) {
familyName = new String(ch, start, length);
fullName += familyName;
bFamilyName = false;
}
if (bGivenName) {
givenName = new String(ch, start, length);
fullName += " " + givenName;
bGivenName = false;
}
System.out.println("Full Name : " + fullName);
}
};
saxParser.parse(filePath, handler);
} catch (Exception e) {
e.printStackTrace();
}
}
}
With this modification, it only gives me the ArticleTitle value and it doesn't return anything regarding the authors full names.
I have another class for parsing the ArticleTitle node and they are both called in a Main class.
What did I do wrong? And how can I fix it?
The fullName variable is overwritten everytime when the characters method is called. I think you should move out that variable into the handler: init with empty string when Author starts and write out when it ends. The concatenation should work as you did. I haven't tried this out but something similear should work:
public class ReadAuthors {
public void parse(String filePath) {
try {
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser saxParser = factory.newSAXParser();
DefaultHandler handler = new DefaultHandler() {
boolean bName = false;
String fullName = "";
@Override
public void startElement(String uri, String localName,String qName,
Attributes attributes) throws SAXException {
if (qName.equalsIgnoreCase("FamilyName")) {
bName = true;
}
if (qName.equalsIgnoreCase("GivenName")) {
bName = true;
}
if (qName.equalsIgnoreCase("Author")) {
fullName = "";
}
}
@Override
public void endElement(String uri, String localName,
String qName) throws SAXException {
if (qName.equalsIgnoreCase("Author")) {
System.out.println("Full Name : " + fullName);
}
}
@Override
public void characters(char ch[], int start, int length) throws SAXException {
String name = "";
if (bName) {
name = new String(ch, start, length);
fullName += name;
bName = false;
}
}
};
saxParser.parse(filePath, handler);
} catch (Exception e) {
e.printStackTrace();
}
}
}