转自：http://www.cnblogs.com/linjiqin/archive/2011/03/11/1981076.html——————————————————————————————————————————————————————————————————————————————————————<?xml version="1.0" encoding="UTF-8"?><StudentInfo>      <student>          <name>赵海波</name>          <sex>男</sex>          <lesson>              <lessonName>Spring整合开发</lessonName>              <lessonScore>85</lessonScore>          </lesson>          <lesson>              <lessonName>轻量级J2EE应用开发</lessonName>              <lessonScore>95</lessonScore>          </lesson>          <lesson>              <lessonName>Ajax应用开发</lessonName>              <lessonScore>80</lessonScore>          </lesson>      </student>      <student>          <name>程卫娜</name>          <sex>女</sex>          <lesson>              <lessonName>Spring整合开发</lessonName>              <lessonScore>80</lessonScore>          </lesson>          <lesson>              <lessonName>轻量级J2EE应用开发</lessonName>              <lessonScore>85</lessonScore>          </lesson>          <lesson>              <lessonName>Ajax应用开发</lessonName>              <lessonScore>90</lessonScore>          </lesson>      </student>  </StudentInfo>  

<?xml version="1.0" encoding="UTF-8"?><!-- 福州的天气情况 --><xml_api_reply version="1">    <weather module_id="0" tab_id="0" mobile_row="0" mobile_zipped="1"        row="0" section="0">        <forecast_information>            <city data="Fuzhou, Fujian" />            <postal_code data="fuzhou" />            <latitude_e6 data="" />            <longitude_e6 data="" />            <forecast_date data="2011-01-08" />            <current_date_time data="2011-01-08 23:00:00 +0000" />            <unit_system data="SI" />        </forecast_information>        <current_conditions>            <condition data="多云" />            <temp_f data="53" />            <temp_c data="12" />            <humidity data="湿度： 43%" />            <icon data="/ig/images/weather/mostly_cloudy.gif" />            <wind_condition data="风向： 东北、风速：1 米/秒" />        </current_conditions>        <forecast_conditions>            <day_of_week data="周六" />            <low data="7" />            <high data="14" />            <icon data="/ig/images/weather/chance_of_rain.gif" />            <condition data="可能有雨" />        </forecast_conditions>        <forecast_conditions>            <day_of_week data="周日" />            <low data="6" />            <high data="12" />            <icon data="/ig/images/weather/chance_of_rain.gif" />            <condition data="可能有雨" />        </forecast_conditions>        <forecast_conditions>            <day_of_week data="周一" />            <low data="5" />            <high data="10" />            <icon data="/ig/images/weather/mostly_sunny.gif" />            <condition data="晴间多云" />        </forecast_conditions>        <forecast_conditions>            <day_of_week data="周二" />            <low data="4" />            <high data="8" />            <icon data="/ig/images/weather/chance_of_rain.gif" />            <condition data="可能有雨" />        </forecast_conditions>    </weather></xml_api_reply>

package com.ljq.entity;

import java.util.Set;

/** * 学生信息表 *  * @author jiqinlin *  */public class Student {    /** 姓名 * */    private String name;    /** 性别 * */    private String sex;    /** 所学课程 * */    private Set<Lesson> lessons;

    public Student() {    }

    public Student(String name, String sex, Set<Lesson> lessons) {        this.name = name;        this.sex = sex;        this.lessons = lessons;    }

    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 Set<Lesson> getLessons() {        return lessons;    }

    public void setLessons(Set<Lesson> lessons) {        this.lessons = lessons;    }

}

package com.ljq.entity;

/** * 课程 *  * @author jiqinlin *  */public class Lesson {    /** 课程名称 * */    private String lessonName;    /** 课程成绩 * */    private int lessonScore;

    public Lesson() {    }

    public Lesson(String lessonName, int lessonScore) {        this.lessonName = lessonName;        this.lessonScore = lessonScore;    }

    public String getLessonName() {        return lessonName;    }

    public void setLessonName(String lessonName) {        this.lessonName = lessonName;    }

    public int getLessonScore() {        return lessonScore;    }

    public void setLessonScore(int lessonScore) {        this.lessonScore = lessonScore;    }

}

package com.ljq.entity;

import java.util.List;

/** * 当前天气信息的类 *  * @author jiqinlin *  */public class Weather {    /** 城市 * */    private String city;    /** 当天日期，格式为yyyy-mm-dd * */    private String forecase_date;    /** 当前时间 * */    private String current_date_time;    /** 现象描述 * */    private String current_condition;    /** 当前干燥程度 * */    private String current_humidity;    /** 当前图片地址 * */    private String current_image_url;    /** 风向 * */    private String current_wind;    /** 此处只能用有序的List集合，因为第一位索引表示当天的天气情况 **/    private List<Forecast> forecasts;

    public String getCity() {        return city;    }

    public void setCity(String city) {        this.city = city;    }

    public String getForecase_date() {        return forecase_date;    }

    public void setForecase_date(String forecase_date) {        this.forecase_date = forecase_date;    }

    public String getCurrent_date_time() {        return current_date_time;    }

    public void setCurrent_date_time(String current_date_time) {        this.current_date_time = current_date_time;    }

    public String getCurrent_condition() {        return current_condition;    }

    public void setCurrent_condition(String current_condition) {        this.current_condition = current_condition;    }

    public String getCurrent_humidity() {        return current_humidity;    }

    public void setCurrent_humidity(String current_humidity) {        this.current_humidity = current_humidity;    }

    public String getCurrent_image_url() {        return current_image_url;    }

    public void setCurrent_image_url(String current_image_url) {        this.current_image_url = current_image_url;    }

    public String getCurrent_wind() {        return current_wind;    }

    public void setCurrent_wind(String current_wind) {        this.current_wind = current_wind;    }

    public List<Forecast> getForecasts() {        return forecasts;    }

    public void setForecasts(List<Forecast> forecasts) {        this.forecasts = forecasts;    }

}

package com.ljq.entity;

/** * 未来天气信息的类 *  * @author jiqinlin *  */public class Forecast {    /** 星期几 * */    private String day_of_week;    /** 最低温度 * */    private String low;    /** 最高温度 * */    private String high;    /** 图片地址 * */    private String image_url;    /** 现象描述 * */    private String condition;

    public String getDay_of_week() {        return day_of_week;    }

    public void setDay_of_week(String day_of_week) {        this.day_of_week = day_of_week;    }

    public String getLow() {        return low;    }

    public void setLow(String low) {        this.low = low;    }

    public String getHigh() {        return high;    }

    public void setHigh(String high) {        this.high = high;    }

    public String getImage_url() {        return image_url;    }

    public void setImage_url(String image_url) {        this.image_url = image_url;    }

    public String getCondition() {        return condition;    }

    public void setCondition(String condition) {        this.condition = condition;    }

}

package com.ljq.sax;

import java.util.HashSet;import java.util.Set;

import org.xml.sax.Attributes;import org.xml.sax.SAXException;import org.xml.sax.helpers.DefaultHandler;

import com.ljq.entity.Lesson;import com.ljq.entity.Student;

public class StudentSax extends DefaultHandler {    private Lesson lesson;    private Set<Lesson> lessons;    private Student student;    private Set<Student> students;    private String preTag;

    @Override    public void startDocument() throws SAXException {        lessons = new HashSet<Lesson>();        students = new HashSet<Student>();    }

    @Override    public void characters(char[] ch, int start, int length)            throws SAXException {        if (student != null) {            String data = new String(ch, start, length);            if ("name".equals(preTag)) {                student.setName(data);            }            if ("sex".equals(preTag)) {                student.setSex(data);            }            if ("lessonName".equals(preTag)) {                lesson.setLessonName(data);            }            if ("lessonScore".equals(preTag)) {                lesson.setLessonScore(Integer.parseInt(data));            }        }    }

    @Override    public void startElement(String uri, String localName, String name,            Attributes attr) throws SAXException {        if ("student".equals(name)) {            student = new Student();        }        if ("lesson".equals(name)) {            lesson = new Lesson();        }        preTag = name;

    }

    @Override    public void endElement(String uri, String localName, String name)            throws SAXException {        if (student != null && "student".equals(name)) {            student.setLessons(lessons);            students.add(student);            student = null;            lessons = new HashSet<Lesson>();        }        if (lesson != null && "lesson".equals(name)) {            lessons.add(lesson);            lesson = null;        }        preTag = null;    }

    public Set<Student> getStudents() {        return students;    }

    public Set<Lesson> getLessons() {        return lessons;    }}

package com.ljq.sax;

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 com.ljq.entity.Forecast;import com.ljq.entity.Weather;

public class WeatherSax extends DefaultHandler {    private Weather weather;    private Forecast forecast;    private List<Forecast> forecasts;    private String preTag;

    @Override    public void startDocument() throws SAXException {        weather = new Weather();        forecasts = new ArrayList<Forecast>();    }

    @Override    public void characters(char[] ch, int start, int length)            throws SAXException {

    }

    @Override    public void startElement(String uri, String localName, String name,            Attributes attr) throws SAXException {

        if ("city".equals(name)) {            weather.setCity(attr.getValue("data")); // 等价于weather.setCity(attr.getValue("data"));        }        if ("forecast_date".equals(name)) {            weather.setForecase_date(attr.getValue("data"));        }        if ("current_date_time".equals(name)) {            weather.setCurrent_date_time(attr.getValue("data"));        }        if("current_conditions".equals(name)){            preTag = name;        }        if ("condition".equals(name) && "current_conditions".equals(preTag)) {            weather.setCurrent_condition(attr.getValue("data"));        }        if ("humidity".equals(name)) {            weather.setCurrent_humidity(attr.getValue("data"));        }        if ("icon".equals(name) && "current_conditions".equals(preTag)) {            weather.setCurrent_image_url(attr.getValue("data"));        }        if ("wind_condition".equals(name)) {            weather.setCurrent_wind(attr.getValue("data"));        }

        if ("forecast_conditions".equals(name)) {            preTag = name; // 记录标识，用来区分相同节点的不同父节点            forecast = new Forecast();        }        if ("day_of_week".equals(name)) {            forecast.setDay_of_week(attr.getValue("data"));        }        if ("low".equals(name)) {            forecast.setLow(attr.getValue("data"));        }        if ("high".equals(name)) {            forecast.setHigh(attr.getValue("data"));        }

        if ("icon".equals(name) && "forecast_conditions".equals(preTag)) {            forecast.setImage_url(attr.getValue("data"));        }        if ("condition".equals(name) && "forecast_conditions".equals(preTag)) {            forecast.setCondition(attr.getValue("data"));        }

    }

    @Override    public void endElement(String uri, String localName, String name)            throws SAXException {        if ("forecast_conditions".equals(name)) {            forecasts.add(forecast);            forecast = null;        }        if ("weather".equals(name)) {            weather.setForecasts(forecasts);        }

    }

    public Weather getWeather() {        return weather;    }}

package com.ljq.test;

import java.io.InputStream;import java.util.Set;

import javax.xml.parsers.SAXParser;import javax.xml.parsers.SAXParserFactory;

import com.ljq.entity.Lesson;import com.ljq.entity.Student;import com.ljq.sax.StudentSax;

public class StudentSaxTest {    public static void main(String[] args) throws Exception {        Set<Student> students = new StudentSaxTest().parseXMLFile();        for(Student stu : students){            System.out.println("name=" + stu.getName());            System.out.println("sex=" + stu.getSex());            Set<Lesson> lessons = stu.getLessons();            for(Lesson lesson : lessons){                System.out.println("LessonName = " + lesson.getLessonName());                System.out.println("LessonScore = " + lesson.getLessonScore());                System.out.println("---------------");            }            System.out.println("==========");        }    }

    // 解析文档    private Set<Student> parseXMLFile() throws Exception {        SAXParserFactory factory = SAXParserFactory.newInstance();        SAXParser saxParser = factory.newSAXParser();        InputStream is = StudentSaxTest.class.getClassLoader()                .getResourceAsStream("student.xml");        StudentSax handle = new StudentSax();        saxParser.parse(is, handle);        is.close();        return handle.getStudents();    }

}

package com.ljq.test;

import java.io.InputStream;import java.util.List;

import javax.xml.parsers.SAXParser;import javax.xml.parsers.SAXParserFactory;

import com.ljq.entity.Forecast;import com.ljq.entity.Weather;import com.ljq.sax.WeatherSax;

public class WeatherSaxTest {

    public static void main(String[] args) throws Exception{        Weather weather = new WeatherSaxTest().readXml();        System.out.println("city=" + weather.getCity());        System.out.println("forecase_date=" + weather.getForecase_date());        System.out.println("current_date_time=" + weather.getCurrent_date_time());        System.out.println("condition=" + weather.getCurrent_condition());        System.out.println("humidity=" + weather.getCurrent_humidity());        System.out.println("icon=" + weather.getCurrent_image_url());        System.out.println("wind_condition=" + weather.getCurrent_wind());        System.out.println("===========");        List<Forecast> forecasts = weather.getForecasts();        for(Forecast forecast : forecasts){            System.out.println("day_of_week=" + forecast.getDay_of_week());            System.out.println("low=" + forecast.getLow());            System.out.println("high=" + forecast.getHigh());            System.out.println("icon=" + forecast.getImage_url());            System.out.println("condition=" + forecast.getCondition());            System.out.println("---------------");        }

    }

    private Weather readXml() throws Exception{        SAXParserFactory factory = SAXParserFactory.newInstance();        SAXParser parser = factory.newSAXParser();        InputStream is = WeatherSaxTest.class.getClassLoader().getResourceAsStream("fuzhou_weather.xml");        WeatherSax handle = new WeatherSax();        parser.parse(is, handle);        is.close();        return handle.getWeather();    }}