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@@ -10,6 +10,8 @@ import com.itextpdf.text.pdf.PdfCopy;
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import com.itextpdf.text.pdf.PdfReader;
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import net.coobird.thumbnailator.Thumbnails;
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import org.apache.commons.lang.StringUtils;
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+import org.apache.pdfbox.pdmodel.PDDocument;
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+import org.apache.pdfbox.text.PDFTextStripper;
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import org.apache.poi.ss.usermodel.ClientAnchor;
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import org.apache.poi.ss.usermodel.Sheet;
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import org.apache.poi.ss.util.CellRangeAddress;
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@@ -91,9 +93,12 @@ public class FileUtils {
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fileName = array[1];
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symbol = url.substring(url.lastIndexOf("."));
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}
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-
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- //获取文件流
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- inputStream = CommonUtil.getOSSInputStream(url);
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+ if (!url.contains("http://") && !url.contains("https://") && Files.exists(Paths.get(url))) {
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+ inputStream = Files.newInputStream(Paths.get(url));
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+ } else {
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+ //获取文件流
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+ inputStream = CommonUtil.getOSSInputStream(url);
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+ }
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//转换
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byte[] bytes = CommonUtil.InputStreamToBytes(inputStream);
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@@ -740,4 +745,190 @@ public class FileUtils {
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throw new ServiceException("IO错误");
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}
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}
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+
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+
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+ /**
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+ * 从电签pdf中提取指定未电签pdf的页面，并生成新的pdf
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+ */
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+ public static String extractPdfPages(String eVisaPdfUrl, String pdfUrl){
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+ if (eVisaPdfUrl == null || eVisaPdfUrl.trim().isEmpty() || eVisaPdfUrl.equals(pdfUrl)) {
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+ return pdfUrl;
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+ }
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+ try (
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+ InputStream eVisaIs = CommonUtil.getOSSInputStream(eVisaPdfUrl);
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+ InputStream pdfIs = CommonUtil.getOSSInputStream(pdfUrl);
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+ // 使用pdfbox读取电签pdf
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+ PDDocument eVisaDocument = PDDocument.load(eVisaIs);
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+ PDDocument pdfDocument = PDDocument.load(pdfIs);
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+ PDDocument newDocument = new PDDocument();
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+ ) {
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+ int page = eVisaDocument.getNumberOfPages();
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+ int page1 = pdfDocument.getNumberOfPages();
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+ int j = 0;
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+ for (int i = 0; i < page; i++) {
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+ String eVisaText = getPdfContent(eVisaDocument, i + 1, i + 1);
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+ if (j >= page1) {
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+ break;
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+ }
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+ String pdfText = getPdfContent(pdfDocument, j + 1, j + 1);
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+ if (!StringUtils.isBlank(eVisaText) && calculateDiffRatio(eVisaText,pdfText) < 0.10) {
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+ newDocument.addPage(eVisaDocument.getPage(i));
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+ j++;
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+ }
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+ }
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+ // 判断新的pdf是否为空，不为空则保存新的pdf
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+ if (newDocument.getNumberOfPages() > 0) {
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+ // 获取临时文件目录
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+ String tempDir = System.getProperty("java.io.tmpdir");
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+ String tempFile = tempDir + File.separator + "new_" + System.currentTimeMillis() + ".pdf";
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+ File file = new File(tempFile);
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+ try {
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+ newDocument.save(file);
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+ return tempFile;
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+ } catch (Exception e) {
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+ e.printStackTrace();
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+ }
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+ }
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+ } catch (Exception e) {
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+ e.printStackTrace();
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+ }
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+ return pdfUrl;
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+ }
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+
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+ public static String extractPdfPages(String eVisaPdfUrl, String[] strList){
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+ if (eVisaPdfUrl == null || eVisaPdfUrl.trim().isEmpty()) {
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+ return eVisaPdfUrl;
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+ }
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+ try (
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+ InputStream eVisaIs = CommonUtil.getOSSInputStream(eVisaPdfUrl);
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+ // 使用pdfbox读取电签pdf
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+ PDDocument eVisaDocument = PDDocument.load(eVisaIs);
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+ PDDocument newDocument = new PDDocument();
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+ ) {
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+ int page = eVisaDocument.getNumberOfPages();
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+ for (int i = 0; i < page; i++) {
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+ String eVisaText = getPdfContent(eVisaDocument, i + 1, i + 1);
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+ if (!StringUtils.isBlank(eVisaText)) {
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+ boolean flag = true;
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+ for (String s : strList) {
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+ flag = eVisaText.contains(s);
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+ if (!flag) {
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+ break;
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+ }
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+ }
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+ if (flag) {
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+ newDocument.addPage(eVisaDocument.getPage(i));
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+ }
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+ }
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+ }
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+ // 判断新的pdf是否为空，不为空则保存新的pdf
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+ if (newDocument.getNumberOfPages() > 0) {
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+ // 获取临时文件目录
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+ String tempDir = System.getProperty("java.io.tmpdir");
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+ String tempFile = tempDir + File.separator + "new_" + System.currentTimeMillis() + ".pdf";
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+ File file = new File(tempFile);
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+ try {
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+ newDocument.save(file);
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+ return tempFile;
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+ } catch (Exception e) {
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+ e.printStackTrace();
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+ }
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+ }
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+ } catch (Exception e) {
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+ e.printStackTrace();
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+ }
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+ return eVisaPdfUrl;
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+ }
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+
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+ /**
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+ * 获取pdf 指定页面的内容
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+ */
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+ private static String getPdfContent(PDDocument doc, int startPage, int endPage) {
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+ try {
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+ PDFTextStripper stripper = new PDFTextStripper();
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+ stripper.setStartPage(startPage);
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+ stripper.setEndPage(endPage);
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+ return stripper.getText(doc);
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+ } catch (Exception e) {
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+ e.printStackTrace();
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+ return "";
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+ }
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+ }
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+ /**
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+ * 计算两个文本之间的差异比例
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+ * @param original 原始文本
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+ * @param modified 修改后的文本
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+ * @return 差异比例 (0.0 - 1.0)，0表示完全相同，1表示完全不同
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+ */
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+ public static double calculateDiffRatio(String original, String modified) {
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+ if (original == null && modified == null) {
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+ return 0.0;
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+ }
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+
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+ if (original == null || modified == null) {
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+ return 1.0;
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+ }
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+
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+ if (original.equals(modified)) {
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+ return 0.0;
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+ }
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+
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+ // 按行分割文本
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+ String[] originalLines = original.split("\n", -1);
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+ String[] modifiedLines = modified.split("\n", -1);
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+
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+ // 使用动态规划计算编辑距离
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+ int editDistance = computeEditDistance(originalLines, modifiedLines);
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+
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+ // 计算最大可能的编辑距离
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+ int maxLength = Math.max(originalLines.length, modifiedLines.length);
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+
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+ if (maxLength == 0) {
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+ return 0.0;
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+ }
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+
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+ // 返回差异比例
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+ return (double) editDistance / maxLength;
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+ }
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+ /**
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+ * 使用动态规划算法计算两个字符串数组之间的编辑距离(Levenshtein距离)
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+ * @param original 原始字符串数组
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+ * @param modified 修改后的字符串数组
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+ * @return 编辑距离
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+ */
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+ private static int computeEditDistance(String[] original, String[] modified) {
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+ int m = original.length;
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+ int n = modified.length;
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+
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+ // 创建DP表
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+ int[][] dp = new int[m + 1][n + 1];
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+
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+ // 初始化边界条件
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+ for (int i = 0; i <= m; i++) {
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+ dp[i][0] = i;
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+ }
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+
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+ for (int j = 0; j <= n; j++) {
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+ dp[0][j] = j;
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+ }
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+
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+ // 填充DP表
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+ for (int i = 1; i <= m; i++) {
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+ for (int j = 1; j <= n; j++) {
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+ if (original[i - 1].equals(modified[j - 1])) {
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+ dp[i][j] = dp[i - 1][j - 1]; // 字符相同，无需操作
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+ } else {
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+ // 取三种操作的最小值+1
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+ dp[i][j] = 1 + Math.min(
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+ Math.min(dp[i - 1][j], // 删除
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+ dp[i][j - 1]), // 插入
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+ dp[i - 1][j - 1] // 替换
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+ );
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+ }
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+ }
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+ }
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+
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+ return dp[m][n];
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+ }
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+
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}
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lvy