java 创建pdf 并转成MultipartFile

以下是Java创建PDF并转换为MultipartFile的代码示例：

// 导入相关依赖
import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Paragraph;
import com.lowagie.text.pdf.PdfWriter;
import org.springframework.mock.web.MockMultipartFile;
import org.springframework.web.multipart.MultipartFile;

import java.io.*;

public class PdfToMultipartFile {

    public static void main(String[] args) throws IOException, DocumentException {
        // 创建PDF文件
        Document document = new Document();
        PdfWriter.getInstance(document, new FileOutputStream("test.pdf"));
        document.open();
        document.add(new Paragraph("Hello World!"));
        document.close();

        // 将PDF文件转换为MultipartFile
        File pdfFile = new File("test.pdf");
        FileInputStream fileInputStream = new FileInputStream(pdfFile);
        MultipartFile multipartFile = new MockMultipartFile(pdfFile.getName(), pdfFile.getName(),
                "application/pdf", fileInputStream);
    }
}