用SAXWriter类的write输出xml

好的，以下是使用SAXWriter类的write方法输出xml的示例代码：

import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.transform.Result;
import javax.xml.transform.sax.SAXResult;
import javax.xml.transform.stream.StreamResult;

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

public class XMLWriterExample {

    public static void main(String[] args) {
        try {
            // 创建SAXParser实例
            SAXParserFactory factory = SAXParserFactory.newInstance();
            SAXParser saxParser = factory.newSAXParser();

            // 创建SAXWriter实例
            SAXWriter writer = new SAXWriter();

            // 设置输出文件
            File file = new File("output.xml");
            OutputStream outputStream = new FileOutputStream(file);

            // 设置输出结果
            Result result = new StreamResult(outputStream);
            writer.setResult(result);

            // 设置XML内容
            List<Book> books = new ArrayList<>();
            books.add(new Book("Java编程思想", "Bruce Eckel", 2017));
            books.add(new Book("Effective Java", "Joshua Bloch", 2018));

            // 写入XML
            writer.startDocument();
            writer.startElement("", "books", "");

            for (Book book : books) {
                writer.startElement("", "book", "");
                writer.startElement("", "title", "");
                writer.characters(book.getTitle().toCharArray(), 0, book.getTitle().length());
                writer.endElement("", "title", "");
                writer.startElement("", "author", "");
                writer.characters(book.getAuthor().toCharArray(), 0, book.getAuthor().length());
                writer.endElement("", "author", "");
                writer.startElement("", "year", "");
                writer.characters(String.valueOf(book.getYear()).toCharArray(), 0, String.valueOf(book.getYear()).length());
                writer.endElement("", "year", "");
                writer.endElement("", "book", "");
            }

            writer.endElement("", "books", "");
            writer.endDocument();

            // 关闭输出流
            outputStream.close();

            System.out.println("XML写入成功！");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    static class Book {
        private String title;
        private String author;
        private int year;

        public Book(String title, String author, int year) {
            this.title = title;
            this.author = author;
            this.year = year;
        }

        public String getTitle() {
            return title;
        }

        public String getAuthor() {
            return author;
        }

        public int getYear() {
            return year;
        }
    }

    static class SAXWriter extends DefaultHandler {
        private Result result;

        public void setResult(Result result) {
            this.result = result;
        }

        public void startDocument() throws SAXException {
            if (result != null) {
                super.startDocument();
            }
        }

        public void endDocument() throws SAXException {
            if (result != null) {
                super.endDocument();
            }
        }

        public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
            if (result != null) {
                super.startElement(uri, localName, qName, attributes);
            }
        }

        public void endElement(String uri, String localName, String qName) throws SAXException {
            if (result != null) {
                super.endElement(uri, localName, qName);
            }
        }

        public void characters(char[] ch, int start, int length) throws SAXException {
            if (result != null) {
                super.characters(ch, start, length);
            }
        }

        public void ignorableWhitespace(char[] ch, int start, int length) throws SAXException {
            if (result != null) {
                super.ignorableWhitespace(ch, start, length);
            }
        }

        public void processingInstruction(String target, String data) throws SAXException {
            if (result != null) {
                super.processingInstruction(target, data);
            }
        }

        public void setDocumentLocator(org.xml.sax.Locator locator) {
            if (result != null) {
                super.setDocumentLocator(locator);
            }
        }

        public void startPrefixMapping(String prefix, String uri) throws SAXException {
            if (result != null) {
                super.startPrefixMapping(prefix, uri);
            }
        }

        public void endPrefixMapping(String prefix) throws SAXException {
            if (result != null) {
                super.endPrefixMapping(prefix);
            }
        }
    }
}

在这个示例中，我们首先创建了一个SAXWriter类，用于写入XML数据。然后，我们设置了输出文件和输出结果，接着我们创建了一个包含书籍信息的列表，并使用SAXWriter类的startElement、characters和endElement方法将这些信息写入XML文件中。最后，我们关闭了输出流并输出了一条成功消息。