<?xml version="1.0"
encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="students.xsl"?>
<students>
<!--A
Student Catalog-->
<student sn="01">
<name>sam</name>
<age>18</age>
</student>
<student sn="02">
<name>lin</name>
<age>20</age>
</student>
</students>
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import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.XMLWriter;
public class XmlGen {
public Document
generateDocumentByMethod() {
Document document = DocumentHelper.createDocument();
// ProcessingInstruction
Map<String, String> inMap = new
HashMap<String, String>();
inMap.put("type", "text/xsl");
inMap.put("href", "students.xsl");
document.addProcessingInstruction("xml-stylesheet", inMap);
// root element
Element studentsElement =
document.addElement("students");
studentsElement.addComment("An Student Catalog");
// son element
Element stuElement =
studentsElement.addElement("student");
stuElement.addAttribute("sn", "01");
Element nameElement =
stuElement.addElement("name");
nameElement.setText("sam");
Element ageElement =
stuElement.addElement("age");
ageElement.setText("18");
// son element
Element anotherStuElement =
studentsElement.addElement("student");
anotherStuElement.addAttribute("sn", "02");
Element anotherNameElement =
anotherStuElement.addElement("name");
anotherNameElement.setText("lin");
Element anotherAgeElement =
anotherStuElement.addElement("age");
anotherAgeElement.setText("20");
return document;
}
public Document
generateDocumentByString() {
String text = "<?xml version=\"1.0\"
encoding=\"UTF-8\"?>" +
"<?xml-stylesheet type=\"text/xsl\"
href=\"students.xsl\"?>" +
"<students><!--An Student Catalog--> <student sn=\"01\">" +
"<name>sam</name><age>18</age></student><student
sn=\"02\">" +
"<name>lin</name><age>20</age></student></students>";
Document document = null;
try {
document = DocumentHelper.parseText(text);
} catch (DocumentException e) {
e.printStackTrace();
}
return document;
}
public void saveDocument(Document
document, File outputXml) {
try {
// 美化格式
OutputFormat format = OutputFormat.createPrettyPrint();
/*// 縮減格式
OutputFormat format =
OutputFormat.createCompactFormat();*/
/*// 指定XML編碼
format.setEncoding("GBK");*/
XMLWriter output = new XMLWriter(new
FileWriter(outputXml), format);
output.write(document);
output.close();
} catch (IOException e) {
System.out.println(e.getMessage());
}
}
public static void main(String[] argv) {
XmlGen dom4j = new XmlGen();
Document document = null;
// document=dom4j.generateDocumentByMethod();
document =
dom4j.generateDocumentByString();
dom4j.saveDocument(document, new File("output.xml"));
}
}
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import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;
public class XmlMod {
public void modifyDocument(File
inputXml) {
try {
SAXReader saxReader = new SAXReader();
Document document =
saxReader.read(inputXml);
List list = document.selectNodes("//students/student/@sn");
Iterator iter = list.iterator();
while (iter.hasNext()) {
Attribute attribute =
(Attribute) iter.next();
if (attribute.getValue().equals("01"))
attribute.setValue("001");
}
list = document.selectNodes("//students/student");
iter = list.iterator();
while (iter.hasNext()) {
Element element = (Element)
iter.next();
Iterator iterator =
element.elementIterator("name");
while (iterator.hasNext()) {
Element nameElement =
(Element) iterator.next();
if (nameElement.getText().equals("sam"))
nameElement.setText("jeff");
}
}
XMLWriter output = new XMLWriter(new FileWriter(new File(
"students-modified.xml")));
output.write(document);
output.close();
}
catch (DocumentException e) {
System.out.println(e.getMessage());
} catch (IOException e) {
System.out.println(e.getMessage());
}
}
public static void main(String[] argv) {
XmlMod dom4jParser = new XmlMod();
dom4jParser.modifyDocument(new File("students-gen.xml"));
}
}
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import java.io.File;
import java.util.Iterator;
import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.ProcessingInstruction;
import org.dom4j.VisitorSupport;
import org.dom4j.io.SAXReader;
public class XmlTra {
private File inputXml;
public XmlTra(File inputXml) {
this.inputXml = inputXml;
}
public Document getDocument() {
SAXReader saxReader = new SAXReader();
Document document = null;
try {
document = saxReader.read(inputXml);
} catch (DocumentException e) {
e.printStackTrace();
}
return document;
}
public Element getRootElement() {
return
getDocument().getRootElement();
}
public void
traversalDocumentByIterator() {
Element root = getRootElement();
// 枚舉根節點下所有子節點
for (Iterator ie = root.elementIterator();
ie.hasNext();) {
System.out.println("======");
Element element = (Element)
ie.next();
System.out.println(element.getName());
// 枚舉屬性
for (Iterator ia =
element.attributeIterator(); ia.hasNext();) {
Attribute attribute =
(Attribute) ia.next();
System.out.println(attribute.getName()
+ ":"
+ attribute.getData());
}
// 枚舉當前節點下所有子節點
for (Iterator ieson =
element.elementIterator(); ieson.hasNext();) {
Element elementSon = (Element)
ieson.next();
System.out.println(elementSon.getName()
+ ":"
+ elementSon.getText());
}
}
}
public void traversalDocumentByVisitor()
{
getDocument().accept(new MyVisitor());
}
/**
* 定義自己的訪問者類
*/
private static class MyVisitor extends
VisitorSupport {
/**
* 對於屬性節點,打印屬性的名字和值
*/
public void visit(Attribute node) {
System.out.println("attribute : " + node.getName()
+ " = "
+ node.getValue());
}
/**
* 對於處理指令節點,打印處理指令目標和數據
*/
public void visit(ProcessingInstruction
node) {
System.out.println("PI : " +
node.getTarget() + " "
+ node.getText());
}
/**
* 對於元素節點,判斷是否只包含文本內容,如是,則打印標記的名字和 元素的內容。如果不是,則只打印標記的名字
*/
public void visit(Element node) {
if (node.isTextOnly())
System.out.println("element : " + node.getName() + " = "
+ node.getText());
else
System.out.println("--------" + node.getName() + "--------");
}
}
public static void main(String[] argv) {
XmlTra dom4jParser = new XmlTra(new File("students-gen.xml"));
// dom4jParser.traversalDocumentByIterator();
dom4jParser.traversalDocumentByVisitor();
}
}
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public class MyVisitor extends VisitorSupport {
public void visit(Element element) {
System.out.println(element.getName());
}
public void visit(Attribute attr) {
System.out.println(attr.getName());
}
}
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import java.io.File;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.ElementHandler;
import org.dom4j.ElementPath;
import org.dom4j.io.SAXReader;
public class XmlHandler {
public static void main(String[] args) {
SAXReader saxReader = new SAXReader();
File file = new File("students.xml");
try {
// 添加一個ElementHandler實例。
saxReader.addHandler("/students/student", new StudentHandler());
saxReader.read(file);
} catch (DocumentException e) {
System.out.println(e.getMessage());
}
}
/**
* 定義StudentHandler處理器類,對<student>元素進行處理。
*/
private static class StudentHandler implements
ElementHandler {
public void .Start(ElementPath path) {
Element elt = path.getCurrent();
System.out.println("Found student: " +
elt.attribut.ue("sn"));
// 添加對子元素<name>的處理器。
path.addHandler("name", new NameHandler());
}
public void .End(ElementPath path) {
// 移除對子元素<name>的處理器。
path.removeHandler("name");
}
}
/**
* 定義NameHandler處理器類,對<student>的<name>子元素進行處理。
*/
private static class NameHandler implements
ElementHandler {
public void .Start(ElementPath path) {
System.out.println("path : " +
path.getPath());
}
public void .End(ElementPath path) {
Element elt = path.getCurrent();
// 輸出<name>元素的名字和它的文本內容。
System.out.println(elt.getName() + " : " + elt.getText());
}
}
}
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import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import org.dom4j.Document;
import org.dom4j.io.DocumentResult;
import org.dom4j.io.DocumentSource;
……
public Document
styleDocument(Document document, String stylesheet)
throws Exception {
// load the transformer using JAXP
TransformerFactory factory =
TransformerFactory.newInstance();
Transformer transformer = factory.newTransformer(new
StreamSource(stylesheet));
// now lets style the given document
DocumentSource source = new
DocumentSource(document);
DocumentResult result = new
DocumentResult();
transformer.transform(source, result);
// return the transformed document
Document transformedDoc =
result.getDocument();
return transformedDoc;
}
……
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