怎么把docxdocument转换为multipartFile

将Docx文档转换为`MultipartFile`通常涉及到两个步骤：首先读取本地的Word文档，然后将其内容包装成`InputStream`，最后通过`MultiPartFactory`创建`MultipartFile`。这通常用于处理用户上传的Word文档到服务器。以下是使用Apache POI库的一个简化示例：

import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.support.StandardMultipartHttpServletRequest;
import org.springframework.web.multipart.support.MultipartRequestFactory;

import java.io.FileInputStream;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Path;

public MultipartFile docxToMultipartFile(String filePath) {
    try {
        XWPFDocument document = new XWPFDocument(new FileInputStream(filePath));
        
        // 将文档内容读取到内存流中
        InputStream inputStream = document.createPackagePart().getStream();
        Path tempFile = Files.createTempFile("docx-", ".docx"); // 创建临时文件
        Files.copy(inputStream, tempFile);

        // 使用Spring提供的工厂创建MultipartFile
        StandardMultipartHttpServletRequest request = (StandardMultipartHttpServletRequest) new StandardMultipartRequestFactory()
                .createRequest(MultipartRequestFactory.DEFAULT_MIMETYPE_MAP,
                        Collections.singletonList(new SimplePart(tempFile.toUri(), "document.docx", null, inputStream)));
        MultipartFile file = request.getFile("document.docx");

        return file;
    } catch (Exception e) {
        throw new RuntimeException("Failed to convert Docx to MultipartFile", e);
    } finally {
        if (tempFile != null) {
            tempFile.delete();
        }
    }
}