java实现springboot pdfdoc上传将这种两种文档每一页转成图片并重命名后保存返回回调值并附上maven的pom代码

1. 实现文件上传

在Spring Boot中，可以使用MultipartFile类型的参数接收上传的文件。具体实现如下：

@PostMapping("/upload")
public String upload(@RequestParam("file") MultipartFile file) {
    // 处理上传的文件
    return "上传成功";
}

2. 将文档转换成图片

可以使用开源的第三方库来实现将pdf、doc等文档转成图片的功能，比如Apache PDFBox和Apache POI。代码示例：

// 转换pdf
PDDocument document = PDDocument.load(file.getInputStream());
PDFRenderer renderer = new PDFRenderer(document);
int pageCount = document.getNumberOfPages();
for (int i = 0; i < pageCount; i++) {
    BufferedImage image = renderer.renderImageWithDPI(i, 300);
    ImageIO.write(image, "png", new File("page_" + i + ".png"));
}

// 转换doc
HWPFDocument document = new HWPFDocument(file.getInputStream());
WordExtractor extractor = new WordExtractor(document);
int pageCount = extractor.getSummaryInformation().getPageCount();
Range range = document.getRange();
for (int i = 0; i < pageCount; i++) {
    BufferedImage image = ImageIO.read(new ByteArrayInputStream(range.getSection(i).toByteArray()));
    ImageIO.write(image, "png", new File("page_" + i + ".png"));
}

3. 完整代码

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.PDFRenderer;
import org.apache.poi.hwpf.HWPFDocument;
import org.apache.poi.hwpf.extractor.WordExtractor;
import org.apache.poi.hwpf.usermodel.Range;
import org.springframework.util.FileCopyUtils;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;

public class FileController {

    @PostMapping("/upload")
    public String upload(@RequestParam("file") MultipartFile file) throws IOException {
        // 将上传的文件保存到本地
        File localFile = new File(file.getOriginalFilename());
        FileCopyUtils.copy(file.getBytes(), localFile);

        // 将文档转成图片
        String filename = localFile.getName();
        String extension = filename.substring(filename.lastIndexOf(".") + 1).toLowerCase();
        int pageCount = 0;
        switch (extension) {
            case "pdf":
                PDDocument document = PDDocument.load(localFile);
                PDFRenderer renderer = new PDFRenderer(document);
                pageCount = document.getNumberOfPages();
                for (int i = 0; i < pageCount; i++) {
                    BufferedImage image = renderer.renderImageWithDPI(i, 300);
                    ImageIO.write(image, "png", new File("page_" + i + ".png"));
                }
                break;
            case "doc":
                HWPFDocument document = new HWPFDocument(file.getInputStream());
                WordExtractor extractor = new WordExtractor(document);
                pageCount = extractor.getSummaryInformation().getPageCount();
                Range range = document.getRange();
                for (int i = 0; i < pageCount; i++) {
                    BufferedImage image = ImageIO.read(new ByteArrayInputStream(range.getSection(i).toByteArray()));
                    ImageIO.write(image, "png", new File("page_" + i + ".png"));
                }
                break;
            default:
                throw new IllegalArgumentException("不支持的文件类型");
        }

        // 删除上传的文件
        localFile.delete();

        return "转换完成，共" + pageCount + "页";
    }

}

4. Maven依赖

需要添加以下依赖：

<dependencies>
    <dependency>
        <groupId>org.apache.pdfbox</groupId>
        <artifactId>pdfbox</artifactId>
        <version>2.0.24</version>
    </dependency>
    <dependency>
        <groupId>org.apache.poi</groupId>
        <artifactId>poi</artifactId>
        <version>3.17-beta2</version>
    </dependency>
    <dependency>
        <groupId>org.apache.poi</groupId>
        <artifactId>poi-scratchpad</artifactId>
        <version>3.17-beta2</version>
    </dependency>
</dependencies>