XMLSlideShow转 MultipartFile

根据提供的引用内容，以下是将XMLSlideShow转换为MultipartFile的示例代码：

import org.springframework.http.MediaType;
import org.springframework.http.codec.multipart.FilePart;
import org.springframework.http.codec.multipart.Part;
import org.springframework.http.codec.multipart.SynchronossPartHttpMessageReader;
import org.springframework.util.MultiValueMap;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestPart;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import reactor.core.publisher.Mono;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardCopyOption;

@RestController
public class FileController {

    @PostMapping("/api/convert")
    public Mono<String> convertToMultipartFile(@RequestPart("file") FilePart filePart) throws IOException {
        // 将XMLSlideShow转换为MultipartFile
        MultipartFile multipartFile = convertXMLSlideShowToMultipartFile(filePart);

        // 处理multipartFile文件逻辑
        // ...

        return Mono.just("success");
    }

    private MultipartFile convertXMLSlideShowToMultipartFile(FilePart filePart) throws IOException {
        // 读取XMLSlideShow文件内容
        Path tempFile = Files.createTempFile("temp", ".pptx");
        filePart.transferTo(tempFile).block();

        // 将文件内容转换为字节数组
        byte[] fileBytes = Files.readAllBytes(tempFile);

        // 创建MultipartFile对象
        return new InMemoryMultipartFile(filePart.filename(), filePart.headers().contentType(), fileBytes);
    }

    private static class InMemoryMultipartFile implements MultipartFile {

        private final String name;
        private final MediaType contentType;
        private final byte[] content;

        public InMemoryMultipartFile(String name, MediaType contentType, byte[] content) {
            this.name = name;
            this.contentType = contentType;
            this.content = content;
        }

        @Override
        public String getName() {
            return name;
        }

        @Override
        public String getOriginalFilename() {
            return name;
        }

        @Override
        public String getContentType() {
            return contentType.toString();
        }

        @Override
        public boolean isEmpty() {
            return content.length == 0;
        }

        @Override
        public long getSize() {
            return content.length;
        }

        @Override
        public byte[] getBytes() throws IOException {
            return content;
        }

        @Override
        public InputStream getInputStream() throws IOException {
            return new ByteArrayInputStream(content);
        }

        @Override
        public void transferTo(Path dest) throws IOException, IllegalStateException {
            Files.copy(getInputStream(), dest, StandardCopyOption.REPLACE_EXISTING);
        }
    }
}

请注意，上述代码是基于Spring Boot框架的示例，用于将XMLSlideShow转换为MultipartFile。在这个示例中，我们使用了Spring的`FilePart`类来处理文件上传，并使用自定义的`InMemoryMultipartFile`类来创建`MultipartFile`对象。