32 lines
1.1 KiB
Java
32 lines
1.1 KiB
Java
package com.qingyun.service.compare;
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import org.apache.pdfbox.pdmodel.PDDocument;
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import org.apache.pdfbox.pdmodel.PDPage;
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import org.apache.pdfbox.text.PDFTextStripper;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* 提取每页的摘要信息（指纹）
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*/
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public class PageFingerprinter {
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public static List<String> extractPageSummaries(PDDocument document) throws IOException, IOException {
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List<String> summaries = new ArrayList<>();
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for (int i = 0; i < document.getNumberOfPages(); i++) {
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PDPage page = document.getPage(i);
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PDFTextStripper stripper = new PDFTextStripper();
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stripper.setStartPage(i + 1);
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stripper.setEndPage(i + 1);
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String text = stripper.getText(document);
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// 去掉回车符、空格、换行符、换页符、缩进符、'\r'
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text = text.replaceAll("\\s+", "");
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// 取前 100 字作为指纹（可根据需要扩展）
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//String summary = text.length() > 500 ? text.substring(0, 500) : text;
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summaries.add(text);
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}
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return summaries;
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}
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}
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