sax解析xml文件，封装到对象中

创建User.java类

public class User {
    private String   id;
    private String name;
    private String age;
    private String password;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAge() {
        return age;
    }

    public void setAge(String age) {
        this.age = age;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

}

　　xml文件内容

<?xml version="1.0" encoding="UTF-8"?>
<users>
    <user id="A001">
        <name>Jack</name>
        <age>25</age>
    </user>
    <user id="A002">
        <name>张三</name>
        <age>80</age>
    </user>
</users>

　　创建XmlParseHandler.java类。集成DefaultHandler，重写部分方法

import java.util.ArrayList;
import java.util.List;

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

public class XmlParseHandler extends DefaultHandler {
    private String     value    = null;
    private List<User> userList = new ArrayList<User>();
    private User       user     = null;

    @Override
    public void startElement(String uri, String localName, String qName, Attributes attributes)
                                                                                               throws SAXException {
        super.startElement(uri, localName, qName, attributes);
        if ("user".equals(qName)) {
            user = new User();
            String id = attributes.getValue("id");
            user.setId(id);
        }
    }

    @Override
    public void characters(char[] ch, int start, int length) throws SAXException {
        super.characters(ch, start, length);
        value = new String(ch, start, length);
    }

    @Override
    public void endElement(String uri, String localName, String qName) throws SAXException {
        super.endElement(uri, localName, qName);
        if (qName.equals("user")) {
            userList.add(user);
            user = null;
        }

        if (qName.equals("name")) {
            user.setName(value);
        }

        if (qName.equals("age")) {
            user.setAge(value);
        }
    }

    public List<User> getUserList() {
        return userList;
    }

    public void setUserList(List<User> userList) {
        this.userList = userList;
    }
}

　　创建XmlParseUtils.java类

import java.util.ArrayList;
import java.util.List;

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

public class XmlParseUtils {

    public static List<User> getUser(String xml) throws Exception {
        List<User> list=new ArrayList<User>();
        // 创建SAXParserFactory实例
        SAXParserFactory spf = SAXParserFactory.newInstance();
        try {
            // 创建SAXParser实例
            SAXParser parser = spf.newSAXParser();
            // 创建DefaultHandler实例
            XmlParseHandler handler = new XmlParseHandler();
            // 开始解析
            parser.parse(xml, handler);
            list=handler.getUserList();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return list;
    }
}

　　创建测试类

import java.util.List;

public class TestSax {
    public static void main(String[] args) {
        try {
            List<User> list=XmlParseUtils.getUser("E:/app/users.xml");
            for(User ele:list){
                System.out.println("name:"+ele.getName());
                System.out.println("age:"+ele.getAge());
            }
        } catch (Exception e) {
           e.printStackTrace();
        }
                System.exit(0);
    }
}

　　控制台输出结果

name:Jack
age:25
name:张三
age:80