非常感谢孙浩老师。

“光标”

方法一：

/**
	 * @Title: test01
	 * @Description: 用“光标”从上至下输出menus.xml的普通节点的名字和文本节点的文本
	 * @param
	 * @return void
	 * @throws
	 */
	@Test
	public void test01() {
		XMLInputFactory factory = XMLInputFactory.newInstance();
		InputStream stream = TestStax.class.getClassLoader()
				.getResourceAsStream("menus.xml");
		try {
			XMLStreamReader reader = factory.createXMLStreamReader(stream);
			while (reader.hasNext()) {
				int index = reader.next();
				// 开始节点
				if (index == XMLStreamConstants.START_ELEMENT) {
					System.out.println(reader.getName());
					// 文本节点
				} else if (index == XMLStreamConstants.CHARACTERS) {
					System.out.println(reader.getText().trim());
					// 结束节点
				} else if (index == XMLStreamConstants.END_ELEMENT) {
					System.out.println("/" + reader.getName());
				}
			}
		} catch (XMLStreamException e) {
			e.printStackTrace();
		} finally {
			if (stream != null)
				try {
					stream.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
		}
	}

/**
	 * @Title: test02
	 * @Description: 用“光标”从上至下输出menus.xml中“food”元素的第一个属性。
	 * @param
	 * @return void
	 * @throws
	 */
	@Test
	public void test02() {
		XMLInputFactory factory = XMLInputFactory.newInstance();
		InputStream stream = TestStax.class.getClassLoader()
				.getResourceAsStream("menus.xml");
		try {
			XMLStreamReader reader = factory.createXMLStreamReader(stream);
			while (reader.hasNext()) {
				int index = reader.next();
				// 开始节点
				if (index == XMLStreamConstants.START_ELEMENT) {
					if (reader.getName().toString() == "food") {
						System.out.println(reader.getAttributeName(0) + ":t"
								+ reader.getAttributeValue(0));
					}
				}
			}
		} catch (XMLStreamException e) {
			e.printStackTrace();
		} finally {
			if (stream != null)
				try {
					stream.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
		}
	}

?

方法三：

/**
	 * @Title: test03
	 * @Description: 用“光标”从上至下输出menus.xml中每个“food”的name和price。
	 * @param
	 * @return void
	 * @throws
	 */
	@Test
	public void test03() {
		XMLInputFactory factory = XMLInputFactory.newInstance();
		InputStream stream = TestStax.class.getClassLoader()
				.getResourceAsStream("menus.xml");
		try {
			XMLStreamReader reader = factory.createXMLStreamReader(stream);
			while (reader.hasNext()) {
				int index = reader.next();
				// 开始节点
				if (index == XMLStreamConstants.START_ELEMENT) {
					String name = reader.getName().toString();
					if (name == "name") {
						System.out.print(reader.getElementText() + "t");
					}
					if (name == "price") {
						System.out.println(reader.getElementText());
					}
				}
			}
		} catch (XMLStreamException e) {
			e.printStackTrace();
		} finally {
			if (stream != null)
				try {
					stream.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
		}
	}

迭代模型

/**
	 * @Title: test04
	 * @Description: 用迭代模型的操作方式输出menus.xml中每个“food”的name和price。
	 * @param
	 * @return void
	 * @throws
	 */
	@Test
	public void test04() {
		XMLInputFactory factory = XMLInputFactory.newInstance();
		InputStream stream = TestStax.class.getClassLoader()
				.getResourceAsStream("menus.xml");
		try {
			XMLEventReader reader = factory.createXMLEventReader(stream);
			int num = 0;
			while (reader.hasNext()) {
				// 通过XMLEvent来获取是否是某种节点类型
				XMLEvent event = reader.nextEvent();
				if (event.isStartElement()) {
					// 通过event.asxxx转换节点
					String name = event.asStartElement().getName().toString();
					if (name == "name") {
						System.out.print(reader.getElementText() + "t");
					}
					if (name == "price") {
						System.out.println(reader.getElementText());
					}
				}
				num++;
			}
			System.out.println(num);
		} catch (XMLStreamException e) {
			e.printStackTrace();
		} finally {
			if (stream != null)
				try {
					stream.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
		}
	}

Filter

/**
	 * @Title: test05
	 * @Description: 用Filter的过滤方式输出menus.xml中每个“food”的name和price。
	 * @param
	 * @return void
	 * @throws
	 */
	@Test
	public void test05() {
		XMLInputFactory factory = XMLInputFactory.newInstance();
		InputStream stream = TestStax.class.getClassLoader()
				.getResourceAsStream("menus.xml");
		try {
			//基于Filter的过滤方式，可以有效的过滤掉不用进行操作的节点，效率会高一些
			XMLEventReader reader = factory.createFilteredReader(
					factory.createXMLEventReader(stream),new EventFilter() {

						//返回true表示会显示，返回false表示不显示
						@Override
						public boolean accept(XMLEvent event) {
							if (event.isStartElement()) {
								String name = event.asStartElement().getName()
										.toString();
								if (name.equals("name") || name.equals("price")) {
									return true;
								}
							}
							return false;
						}
					});
			int num = 0;
			while (reader.hasNext()) {
				// 通过XMLEvent来获取是否是某种节点类型
				XMLEvent event = reader.nextEvent();
				if (event.isStartElement()) {
					// 通过event.asxxx转换节点
					String name = event.asStartElement().getName().toString();
					if (name == "name") {
						System.out.print(reader.getElementText() + "t");
					}
					if (name == "price") {
						System.out.println(reader.getElementText());
					}
				}
				num++;
			}
			System.out.println(num);
		} catch (XMLStreamException e) {
			e.printStackTrace();
		} finally {
			if (stream != null)
				try {
					stream.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
		}
	}

发现filter的效率是非常高的，循环次数是最好的。