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  • SAX-xml解析

    <?xml version="1.0" encoding="UTF-8"?>
    <bookstore>
    <book id="1">
    <name>冰与火之歌</name>
    <author>乔治马丁</author>
    </book>
    <book id="2">
    <name>安徒生童话</name>
    <author>2004</author>
    </book>
    </bookstore>

    package com.xml;
    
    import org.xml.sax.Attributes;
    import org.xml.sax.SAXException;
    import org.xml.sax.helpers.DefaultHandler;
    
    import javax.xml.parsers.ParserConfigurationException;
    import javax.xml.parsers.SAXParser;
    import javax.xml.parsers.SAXParserFactory;
    import java.io.IOException;
    import java.util.ArrayList;
    import java.util.List;
    
    /**
     * SAX 包来解析xml simple apis for xml
     */
    
    public class demo01 {
        public static void main(String[] args) throws ParserConfigurationException, SAXException, IOException {
            SAXParserFactory factory = SAXParserFactory.newInstance();
            SAXParser saxParser = factory.newSAXParser();
            MyHandle myHandle = new MyHandle();
            saxParser.parse(Thread.currentThread().getContextClassLoader().getResourceAsStream("com/xml/index.xml"), myHandle);
            List<User> users = myHandle.getUsers();
            for (User item : users) {
                System.out.println(item.getName() + "----------------" + item.getAuthor());
            }
        }
    }
    
    class MyHandle extends DefaultHandler {
        private List<User> users = new ArrayList<>();
        private String tag;
        private User user;
    
        public MyHandle() {
            super();
        }
    
        @Override
        public void startDocument() throws SAXException {
            super.startDocument();
        }
    
        @Override
        public void endDocument() throws SAXException {
            super.endDocument();
        }
    
        @Override
        public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
            super.startElement(uri, localName, qName, attributes);
            if (null != qName) {
                tag = qName;
            }
            if (null != qName && qName.equals("book")) {
                this.user = new User();
            }
        }
    
        @Override
        public void endElement(String uri, String localName, String qName) throws SAXException {
            super.endElement(uri, localName, qName);
            if (null != qName && qName.equals("book")) {
                if (null != user) {
                    this.users.add(this.user);
                }
            }
            this.tag = null;
        }
    
        public List<User> getUsers() {
            return users;
        }
    
        public void setUsers(List<User> users) {
            this.users = users;
        }
    
        @Override
        public void characters(char[] ch, int start, int length) throws SAXException {
            super.characters(ch, start, length);
            String line = new String(ch, start, length).trim();
            // 如果是名字标签
            if (null != tag && tag.equals("name")) {
                user.setName(line);
            } else if (null != tag && tag.equals("author")) {
                user.setAuthor(line);
            }
        }
    }
    

      

    package com.xml;
    
    public class User {
        private String name;
        private String author;
        public static void main(String[] args){
        }
    
        public User() {
        }
    
        public User(String name, String author) {
            this.name = name;
            this.author = author;
        }
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    
        public String getAuthor() {
            return author;
        }
    
        public void setAuthor(String author) {
            this.author = author;
        }
    }

    走过的坑,没有实例化范型类
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  • 原文地址:https://www.cnblogs.com/leigepython/p/9993209.html
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