xml文件的三种解析方式 DOM SAM PULL

<?xml version="1.0" encoding="UTF-8"?>
<root><student id="1" group="1"><name>小鹏</name><sex>男</sex><age>28</age><email>lvjian117@163.com</email><birthday>1984-03-03</birthday><memo>优良</memo></student><student id="2" group="2"><name>张思品</name><sex>女</sex><age>18</age><email>zhangshiping@163.com</email><birthday>1999-06-08</birthday><memo>好学生</memo></student><student id="3" group="3"><name>小王</name><sex>男</sex><age>18</age><email>xiaowang@163.com</email><birthday>1987-06-08</birthday><memo>好学生</memo></student><student id="4" group="4"><name>小张</name><sex>男</sex><age>18</age><email>xiaozhang@163.com</email><birthday>1987-06-08</birthday><memo>好学生</memo></student><student id="5" group="5"><name>小明</name><sex>男</sex><age>18</age><email>xiaoming@163.com</email><birthday>1987-06-08</birthday><memo>好学生</memo></student>
</root>

2,student.java

package cn.wzg.domain;public class Student {private int id;private int group;private String name;private String sex;private int age;private String email;private String memo;private String birthday;public int getId() {return id;}public void setId(int id) {this.id = id;}public int getGroup() {return group;}public void setGroup(int group) {this.group = group;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}public String getEmail() {return email;}public void setEmail(String email) {this.email = email;}public String getMemo() {return memo;}public void setMemo(String memo) {this.memo = memo;}public String getBirthday() {return birthday;}public void setBirthday(String birthday) {this.birthday = birthday;}@Overridepublic String toString() {// TODO Auto-generated method stubreturn "my name is"+this.getName()+"  "+"my brithday is "+this.getBirthday();}}

一，SAX解析

SAX解析XML文档采用事件驱动模式。什么是事件驱动模式？它将XML文档转换成一系列的事件，由单独的事件处理器来决定如何处理。

基于事件驱动的处理模式主要是基于事件源和事件处理器（或者叫监听器）来工作的。一个可以产生事件的对象叫做事件源，而一个可以针对事件做出响应的对象就被叫做事件处理器。

（1）SaxParseXmlHandler

package cn.wzg.javabean;import java.util.ArrayList;
import java.util.List;import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;import cn.wzg.domain.Student;public class SaxParseXmlHandler extends DefaultHandler {private List<Student> list;private Student student;private String tagname;public List<Student> getList() {return list;}public void setList(List<Student> list) {this.list = list;}public Student getStudent() {return student;}public void setStudent(Student student) {this.student = student;}public String getTagname() {return tagname;}public void setTagname(String tagname) {this.tagname = tagname;}@Overridepublic void startDocument() throws SAXException {list = new ArrayList<Student>();}@Overridepublic void endDocument() throws SAXException {}@Overridepublic void startElement(String uri, String localName, String qName,Attributes attributes) throws SAXException {if (qName.equals("student")) {student = new Student();student.setId(Integer.parseInt(attributes.getValue(0)));student.setGroup(Integer.parseInt(attributes.getValue(1)));}tagname = qName;}@Overridepublic void endElement(String uri, String localName, String qName)throws SAXException {if (qName.equals("student")) {list.add(student);}tagname = null;}@Overridepublic void characters(char[] ch, int start, int length)throws SAXException {if (tagname != null) {String data = new String(ch, start, length);if (tagname.equals("name")) {student.setName(data);} else if (tagname.equals("sex")) {student.setSex(data);} else if (tagname.equals("age")) {student.setAge(Integer.parseInt(data));} else if (tagname.equals("email")) {student.setEmail(data);} else if (tagname.equals("birthday")) {student.setBirthday(data);} else if (tagname.equals("memo")) {student.setBirthday(data);}}}}

(2)SaxParseXmlService.java

package cn.wzg.service;import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;import cn.wzg.domain.Student;
import cn.wzg.javabean.SaxParseXmlHandler;public class SaxParseXmlService {public static List<Student> getStudent(InputStream inputstrem) throws Throwable {List<Student> students = new ArrayList<Student>();//得到SAX哭器的工厂对象 ,让工厂对象去创建器对象SAXParser parser =SAXParserFactory.newInstance().newSAXParser();//创建DefaultHandler对象,SaxParseXmlHandler继承DefaultHandlerSaxParseXmlHandler handler= new SaxParseXmlHandler();parser.parse(inputstrem, handler);students=handler.getList();return students;}}

(3)TestStudentService.java

package cn.wzg.test;import java.io.InputStream;
import java.util.List;import cn.wzg.domain.Student;
import cn.wzg.service.DomPraseXmlService;
import cn.wzg.service.PullParseXmlService;
import cn.wzg.service.SaxParseXmlService;import android.test.AndroidTestCase;
import android.util.Log;//xml的三种解析问题
public class TestStudentService extends AndroidTestCase {private final static String DOMTAG = "TestStudentService";private final static String PULLTAG = "PullParseXmlService";private final static String SAXTAG = "SaxParseXmlService";public void testDomPraseService() throws Throwable {InputStream inStream = this.getClass().getClassLoader().getResourceAsStream("student.xml");List<Student> students = DomPraseXmlService.getStudent(inStream);for (Student student : students) {student.getName();Log.i(DOMTAG, student.toString());}}public void testPullParseXmlService() throws Throwable {InputStream inStream = this.getClass().getClassLoader().getResourceAsStream("student.xml");List<Student> students = PullParseXmlService.getStudent(inStream);for (Student student : students) {// student.getName();
            Log.i(PULLTAG, student.toString());}}public void testSaxParseXmlService() throws Throwable {InputStream inStream = this.getClass().getClassLoader().getResourceAsStream("student.xml");List<Student> students = SaxParseXmlService.getStudent(inStream);for (Student student : students) {// student.getName();
            Log.i(SAXTAG, student.toString());}}}

二，DOM解析xml

dom编程不要其它的依赖包，因为JDK里自带的JDK里含有的上面提到的org.w3c.dom、org.xml.sax
和javax.xml.parsers包就可以满意条件了。

（1）DomPraseXmlService.java

package cn.wzg.service;import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import cn.wzg.domain.Student;/*** 采用dom解析xml文件内容* * @author cooperator* */public class DomPraseXmlService {public static List<Student> getStudent(InputStream inputstrem)throws Throwable {List<Student> students = new ArrayList<Student>();DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();DocumentBuilder db = factory.newDocumentBuilder();Document document = db.parse(inputstrem);Element element = document.getDocumentElement();NodeList studentNode = element.getElementsByTagName("student");for (int i = 0; i < studentNode.getLength(); i++) {Element studentElement = (Element) studentNode.item(i);Student student = new Student();student.setId(Integer.parseInt(studentElement.getAttribute("id")));student.setGroup(Integer.parseInt(studentElement.getAttribute("group")));NodeList studentChildNode = studentElement.getChildNodes();for (int j = 0; j < studentChildNode.getLength(); j++) {if (studentChildNode.item(j).getNodeType() == Node.ELEMENT_NODE) {Element childElement = (Element) studentChildNode.item(j);if ("name".equals(childElement.getNodeName())) {student.setName(childElement.getFirstChild().getNodeValue());} else if ("age".equals(childElement.getNodeName())) {student.setAge(Integer.parseInt(childElement.getFirstChild().getNodeValue()));} else if ("sex".equals(childElement.getNodeName())) {student.setSex(childElement.getFirstChild().getNodeValue());} else if ("email".equals(childElement.getNodeName())) {student.setEmail(childElement.getFirstChild().getNodeValue());} else if ("memo".equals(childElement.getNodeName())) {student.setMemo(childElement.getFirstChild().getNodeValue());} else if ("birthday".equals(childElement.getNodeName())) {student.setBirthday(childElement.getFirstChild().getNodeValue());}}}students.add(student);}return students;}}

(2)测试类和上面的一样TestStudentService.java

package cn.wzg.test;import java.io.InputStream;
import java.util.List;import cn.wzg.domain.Student;
import cn.wzg.service.DomPraseXmlService;
import cn.wzg.service.PullParseXmlService;
import cn.wzg.service.SaxParseXmlService;import android.test.AndroidTestCase;
import android.util.Log;//xml的三种解析问题
public class TestStudentService extends AndroidTestCase {private final static String DOMTAG = "TestStudentService";private final static String PULLTAG = "PullParseXmlService";private final static String SAXTAG = "SaxParseXmlService";public void testDomPraseService() throws Throwable {InputStream inStream = this.getClass().getClassLoader().getResourceAsStream("student.xml");List<Student> students = DomPraseXmlService.getStudent(inStream);for (Student student : students) {student.getName();Log.i(DOMTAG, student.toString());}}public void testPullParseXmlService() throws Throwable {InputStream inStream = this.getClass().getClassLoader().getResourceAsStream("student.xml");List<Student> students = PullParseXmlService.getStudent(inStream);for (Student student : students) {// student.getName();
            Log.i(PULLTAG, student.toString());}}public void testSaxParseXmlService() throws Throwable {InputStream inStream = this.getClass().getClassLoader().getResourceAsStream("student.xml");List<Student> students = SaxParseXmlService.getStudent(inStream);for (Student student : students) {// student.getName();
            Log.i(SAXTAG, student.toString());}}}

三，PULL解析XML
PullParseXmlService.java

package cn.wzg.service;import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;import org.xmlpull.v1.XmlPullParser;import android.util.Xml;import cn.wzg.domain.Student;public class PullParseXmlService {public static List<Student> getStudent(InputStream inputStream)throws Throwable {List<Student> students = null;Student student = null;XmlPullParser parser = Xml.newPullParser();parser.setInput(inputStream, "Utf-8");int event = parser.getEventType();while (event != XmlPullParser.END_DOCUMENT) {switch (event) {case XmlPullParser.START_DOCUMENT:students = new ArrayList<Student>();break;case XmlPullParser.START_TAG:if ("student".equals(parser.getName())) {student = new Student();student.setId(Integer.parseInt(parser.getAttributeValue(0)));student.setGroup(Integer.parseInt(parser.getAttributeValue(1)));}if (student != null) {if ("name".equals(parser.getName())) {student.setName(parser.nextText());} else if ("sex".equals(parser.getName())) {student.setSex(parser.nextText());} else if ("age".equals(parser.getName())) {student.setAge(Integer.parseInt(parser.nextText()));} else if ("email".equals(parser.getName())) {student.setEmail(parser.nextText());} else if ("birthday".equals(parser.getName())) {student.setBirthday(parser.nextText());} else if ("memo".equals(parser.getName())) {student.setMemo(parser.nextText());}}break;case XmlPullParser.END_TAG:if ("student".equals(parser.getName())) {students.add(student);student = null;}break;}event = parser.next();}return students;}
}

(2)测试类

package cn.wzg.test;import java.io.InputStream;
import java.util.List;import cn.wzg.domain.Student;
import cn.wzg.service.DomPraseXmlService;
import cn.wzg.service.PullParseXmlService;
import cn.wzg.service.SaxParseXmlService;import android.test.AndroidTestCase;
import android.util.Log;//xml的三种解析问题
public class TestStudentService extends AndroidTestCase {private final static String DOMTAG = "TestStudentService";private final static String PULLTAG = "PullParseXmlService";private final static String SAXTAG = "SaxParseXmlService";public void testDomPraseService() throws Throwable {InputStream inStream = this.getClass().getClassLoader().getResourceAsStream("student.xml");List<Student> students = DomPraseXmlService.getStudent(inStream);for (Student student : students) {student.getName();Log.i(DOMTAG, student.toString());}}public void testPullParseXmlService() throws Throwable {InputStream inStream = this.getClass().getClassLoader().getResourceAsStream("student.xml");List<Student> students = PullParseXmlService.getStudent(inStream);for (Student student : students) {// student.getName();
            Log.i(PULLTAG, student.toString());}}public void testSaxParseXmlService() throws Throwable {InputStream inStream = this.getClass().getClassLoader().getResourceAsStream("student.xml");List<Student> students = SaxParseXmlService.getStudent(inStream);for (Student student : students) {// student.getName();
            Log.i(SAXTAG, student.toString());}}}

转载于:https://www.cnblogs.com/lvjian117/archive/2012/05/01/2478170.html

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