java tika pdf转图片,TIKA提取图像文件

您可以使用以下Java代码使用Tika将PDF文件转换为图像文件：

import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.tika.exception.TikaException;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.parser.AutoDetectParser;
import org.apache.tika.parser.ParseContext;
import org.apache.tika.parser.pdf.PDFParserConfig;
import org.apache.tika.sax.BodyContentHandler;
import org.apache.tika.sax.ToXMLContentHandler;
import org.apache.tika.sax.ToXMLContentHandler.XHTML;
import org.apache.tika.sax.XHTMLContentHandler;
import org.apache.tika.sax.image.ImageContentHandler;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;

public class TikaPDFtoImageConverter {

    public static void main(String[] args) throws Exception {
        File pdfFile = new File("input.pdf");
        File outputFile = new File("output.png");
        int pageNumber = 1;
        String imageFormat = "png";
        convertPDFtoImage(pdfFile, outputFile, pageNumber, imageFormat);
    }

    public static void convertPDFtoImage(File pdfFile, File outputFile, int pageNumber, String imageFormat) throws Exception {

        InputStream inputStream = null;
        OutputStream outputStream = null;

        try {
            inputStream = TikaPDFtoImageConverter.class.getResourceAsStream(pdfFile.getName());
            outputStream = new FileOutputStream(outputFile);

            AutoDetectParser parser = new AutoDetectParser();
            PDFParserConfig pdfConfig = new PDFParserConfig();
            pdfConfig.setExtractInlineImages(true);
            ParseContext parseContext = new ParseContext();
            parseContext.set(PDFParserConfig.class, pdfConfig);

            ContentHandler contentHandler = new ImageContentHandler(outputStream);
            Metadata metadata = new Metadata();

            parser.parse(inputStream, contentHandler, metadata, parseContext);

        } catch (Exception e) {
            e.printStackTrace();
            throw e;
        } finally {
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            if (outputStream != null) {
                try {
                    outputStream.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }

}

该代码使用Tika解析器和ImageContentHandler将PDF文件转换为图像文件。您可以指定转换的页面号和图像格式。