import java.io.FileInputStream;
import java.io.FileNotFoundException;

import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;

/**
 * Stax解析Xml
 * @author Administrator
 *
 */
public class StaxXmlUtils {
	
	private static XMLInputFactory factory;
	private static XMLStreamReader reader;
	
	static{
		factory = XMLInputFactory.newInstance();
	}
	
	public static void parseXml() throws FileNotFoundException, XMLStreamException{
		FileInputStream fis = new FileInputStream("src/users.xml");
		reader = factory.createXMLStreamReader(fis);
		// 遍历XML文档
		try {
			while (reader.hasNext()) {
				int event = reader.next();
				// 如果是元素的开始
				if (event == XMLStreamConstants.START_ELEMENT) {
					// 列出所有
					if ("user".equalsIgnoreCase(reader.getLocalName())) {
						System.out.println("name:" + reader.getAttributeValue(null, "name"));
					}
				}
			}
			reader.close();
		} catch (XMLStreamException e) {
			e.printStackTrace();
		}
	}
	
	// 列出所有用户的名称和年龄
	public static void listAllAttrs() throws FileNotFoundException, XMLStreamException {
		FileInputStream fis = new FileInputStream("src/user.xml");
		reader = factory.createXMLStreamReader(fis);
		try {
			while (reader.hasNext()) {
				// 跳过所有空白、注释或处理指令，到下一个START_ELEMENT
				int event = reader.next();
				if (event == XMLStreamConstants.START_ELEMENT) {
					if ("user".equalsIgnoreCase(reader.getLocalName())) {
						System.out.print("name:" + reader.getAttributeValue(null, "name"));
						System.out.print(";age:" + reader.getAttributeValue(null, "age"));
						System.out.println(";gender:" + reader.getAttributeValue(null, "gender"));
					}
				}
			}
			reader.close();
		} catch (XMLStreamException e) {
			e.printStackTrace();
		}
	}
	
	/**
	 * 测试
	 * @param args
	 * @throws FileNotFoundException
	 * @throws XMLStreamException
	 */
	public static void main(String[] args) throws FileNotFoundException, XMLStreamException {
		listAllAttrs();
	}
}