java增量读写XML

import java.io.File;
import java.io.FileOutputStream;
import java.util.HashSet;
import java.util.Set;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;
import org.w3c.dom.NodeList;

public class MyClass<T> {

	Set<?> set = new HashSet<T>();

	public static void main(String[] args) {

		/**
		 * The method add(capture#1-of ?) in the type Set<capture#1-of ?> is not
		 * applicable for the arguments (Collection<capture#2-of ?>)
		 */
		// new MyClass<Integer>().set.add((Collection<?>) new Object());

		try {
			File f = new File("test.xml");
			DocumentBuilderFactory factory = DocumentBuilderFactory
					.newInstance();
			DocumentBuilder builder = factory.newDocumentBuilder();
			Document doc = builder.parse(f);
			NodeList nl = doc.getElementsByTagName("GolfCourse");
			for (int i = 0; i < nl.getLength(); i++) {
				doc.getElementsByTagName("Name").item(i).getFirstChild().setNodeValue("hello");
				// System.out.print("Name: " +
				// doc.getElementsByTagName("Name").item(i).getFirstChild().getNodeValue());
				// System.out.println("Slope: " +
				// doc.getElementsByTagName("Slope").item(i).getFirstChild().getNodeValue());
			}
			
			TransformerFactory transFactory = TransformerFactory.newInstance();
			Transformer transformer = transFactory.newTransformer();
			DOMSource source = new DOMSource();
			source.setNode(doc);
			StreamResult result = new StreamResult();
			result.setOutputStream(new FileOutputStream("test.xml"));
			transformer.transform(source, result);
			
			
			

		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

test.xml

<?xml version="1.0" encoding="UTF-8"?>
<tns:GolfCountryClub xmlns:tns="http://www.example.org/GolfCountryClub" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.example.org/GolfCountryClub GolfCountryClub.xsd ">

  <GolfCourse NumberOfHoles="18">
    <Name>Bird's Nest Course</Name>
    <Yardage>7125</Yardage>
    <Par>72</Par>
    <Handicap>74.6</Handicap>
    <Slope>138</Slope>
  </GolfCourse>
  
  <GolfCourse NumberOfHoles="18">
    <Name>Eagle's Nest Course</Name>
    <Yardage>7198</Yardage>
    <Par>72</Par>
    <Handicap>73.5</Handicap>
    <Slope>136</Slope>
  </GolfCourse>
  
  <Member handicap="20">
    <RegularMember>
      <FirstName>Keith</FirstName>
      <LastName>Chong</LastName>
      <MembershipExpiry>2010-10-31</MembershipExpiry>
    </RegularMember>
  </Member>

  <Member handicap="0">
    <ExclusiveMember>
      <FirstName>James</FirstName>
      <MiddleName>Lion</MiddleName>
      <LastName>Chan</LastName>
      <ValetParkingID>124</ValetParkingID>
      <LockerNumber>10</LockerNumber>
    </ExclusiveMember>
  </Member>

  <Member handicap="25">
    <RestrictedMember>
      <FirstName>Allan</FirstName>
      <LastName>Chong</LastName>
      <MembershipExpiry>2010-10-31</MembershipExpiry>
      <LimitedPlay>Weekend Only</LimitedPlay>
    </RestrictedMember>
  </Member>
  
  <Member handicap="10">
    <RegularMember>
      <FirstName>Murray</FirstName>
      <MiddleName>Izzun</MiddleName>
      <LastName>Beaton</LastName>
      <MembershipExpiry>2010-09-30</MembershipExpiry>
    </RegularMember>
  </Member>

  <Employee>
    <FirstName>Craig</FirstName>
    <LastName>Salter</LastName>
    <EmployeeNumber>12463</EmployeeNumber>
  </Employee>
  
  <Employee>
    <FirstName>Ernest</FirstName>
    <LastName>Mah</LastName>
    <EmployeeNumber>15234</EmployeeNumber>
  </Employee>

  <ProShop>
    <GolfClub>
      <ManufacturerName>Tailor Built</ManufacturerName>
      <Quantity>20</Quantity>
      <ClubKind>Driver</ClubKind>
      <Loft>10.5 Degrees</Loft>
      <Shaft>Stiff</Shaft>
    </GolfClub>
    <GolfClub>
      <ManufacturerName>Clever Plains</ManufacturerName>
      <Quantity>5</Quantity>
      <ClubKind>Wedge</ClubKind>
      <Loft>60 Degrees</Loft>
      <Shaft>Regular</Shaft>
    </GolfClub>
    <BoxOfBalls>
      <ManufacturerName>A-Subject</ManufacturerName>
      <Quantity>20</Quantity>
      <ProductDetails>Pos. A High Spin/12</ProductDetails>
    </BoxOfBalls>
  </ProShop>

</tns:GolfCountryClub>

修改后的test.xml

<?xml version="1.0" encoding="UTF-8" standalone="no"?><tns:GolfCountryClub xmlns:tns="http://www.example.org/GolfCountryClub" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.example.org/GolfCountryClub GolfCountryClub.xsd ">

  <GolfCourse NumberOfHoles="18">
    <Name>hello</Name>
    <Yardage>7125</Yardage>
    <Par>72</Par>
    <Handicap>74.6</Handicap>
    <Slope>138</Slope>
  </GolfCourse>
  
  <GolfCourse NumberOfHoles="18">
    <Name>hello</Name>
    <Yardage>7198</Yardage>
    <Par>72</Par>
    <Handicap>73.5</Handicap>
    <Slope>136</Slope>
  </GolfCourse>
  
  <Member handicap="20">
    <RegularMember>
      <FirstName>Keith</FirstName>
      <LastName>Chong</LastName>
      <MembershipExpiry>2010-10-31</MembershipExpiry>
    </RegularMember>
  </Member>

  <Member handicap="0">
    <ExclusiveMember>
      <FirstName>James</FirstName>
      <MiddleName>Lion</MiddleName>
      <LastName>Chan</LastName>
      <ValetParkingID>124</ValetParkingID>
      <LockerNumber>10</LockerNumber>
    </ExclusiveMember>
  </Member>

  <Member handicap="25">
    <RestrictedMember>
      <FirstName>Allan</FirstName>
      <LastName>Chong</LastName>
      <MembershipExpiry>2010-10-31</MembershipExpiry>
      <LimitedPlay>Weekend Only</LimitedPlay>
    </RestrictedMember>
  </Member>
  
  <Member handicap="10">
    <RegularMember>
      <FirstName>Murray</FirstName>
      <MiddleName>Izzun</MiddleName>
      <LastName>Beaton</LastName>
      <MembershipExpiry>2010-09-30</MembershipExpiry>
    </RegularMember>
  </Member>

  <Employee>
    <FirstName>Craig</FirstName>
    <LastName>Salter</LastName>
    <EmployeeNumber>12463</EmployeeNumber>
  </Employee>
  
  <Employee>
    <FirstName>Ernest</FirstName>
    <LastName>Mah</LastName>
    <EmployeeNumber>15234</EmployeeNumber>
  </Employee>

  <ProShop>
    <GolfClub>
      <ManufacturerName>Tailor Built</ManufacturerName>
      <Quantity>20</Quantity>
      <ClubKind>Driver</ClubKind>
      <Loft>10.5 Degrees</Loft>
      <Shaft>Stiff</Shaft>
    </GolfClub>
    <GolfClub>
      <ManufacturerName>Clever Plains</ManufacturerName>
      <Quantity>5</Quantity>
      <ClubKind>Wedge</ClubKind>
      <Loft>60 Degrees</Loft>
      <Shaft>Regular</Shaft>
    </GolfClub>
    <BoxOfBalls>
      <ManufacturerName>A-Subject</ManufacturerName>
      <Quantity>20</Quantity>
      <ProductDetails>Pos. A High Spin/12</ProductDetails>
    </BoxOfBalls>
  </ProShop>

</tns:GolfCountryClub>