java 将字符串生成xml文件并压缩成zip

可以使用Java中的DOM和ZipOutputStream来实现将字符串生成xml文件并压缩成zip的功能。以下是一个简单的实现示例：

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;

public class XmlZipper {
  
  public static void main(String[] args) throws Exception {
    // 生成xml字符串
    String xmlString = "<root><message>Hello World!</message></root>";
    // 将xml字符串转换为Document对象
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder = factory.newDocumentBuilder();
    Document document = builder.parse(new ByteArrayInputStream(xmlString.getBytes()));

    // 创建zip文件
    File zipFile = new File("example.zip");
    ZipOutputStream zipOut = new ZipOutputStream(new FileOutputStream(zipFile));
    
    // 将xml写入zip文件
    ZipEntry xmlEntry = new ZipEntry("example.xml");
    zipOut.putNextEntry(xmlEntry);
    ByteArrayOutputStream xmlOut = new ByteArrayOutputStream();
    document.setXmlStandalone(true);
    document.normalize();
    document.getDocumentElement().normalize();
    XmlUtils.writeXml(document, xmlOut);
    zipOut.write(xmlOut.toByteArray());
    xmlOut.close();
    zipOut.closeEntry();
    
    // 关闭zip文件
    zipOut.finish();
    zipOut.close();
  }

  public static class XmlUtils {
    public static void writeXml(Document document, ByteArrayOutputStream out) throws Exception {
      javax.xml.transform.TransformerFactory tf = javax.xml.transform.TransformerFactory.newInstance();
      javax.xml.transform.Transformer transformer = tf.newTransformer();
      transformer.setOutputProperty(javax.xml.transform.OutputKeys.ENCODING, "UTF-8");
      transformer.setOutputProperty(javax.xml.transform.OutputKeys.INDENT, "yes");
      javax.xml.transform.dom.DOMSource source = new javax.xml.transform.dom.DOMSource(document);
      javax.xml.transform.stream.StreamResult result = new javax.xml.transform.stream.StreamResult(out);
      transformer.transform(source, result);
    }
  }
}

这段代码将生成一个名为example.zip的压缩文件，并在其中包含了一个名为example.xml的xml文件。你可以使用ZipFile类来解压缩该文件，并读取其中的xml内容。