94 lines
4.3 KiB
Java
94 lines
4.3 KiB
Java
package cn.keking.service.impl;
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import cn.keking.config.ConfigConstants;
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import cn.keking.model.FileAttribute;
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import cn.keking.model.ReturnResponse;
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import cn.keking.service.FilePreview;
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import cn.keking.utils.DownloadUtils;
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import cn.keking.service.FileHandlerService;
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import cn.keking.service.OfficeToPdfService;
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import cn.keking.utils.PdfUtils;
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import cn.keking.web.filter.BaseUrlFilter;
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import org.springframework.stereotype.Service;
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import org.springframework.ui.Model;
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import org.springframework.util.StringUtils;
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import java.util.List;
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/**
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* Created by kl on 2018/1/17.
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* Content :处理office文件
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*/
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@Service
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public class OfficeFilePreviewImpl implements FilePreview {
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private final FileHandlerService fileHandlerService;
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private final PdfUtils pdfUtils;
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private final OfficeToPdfService officeToPdfService;
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public OfficeFilePreviewImpl(FileHandlerService fileHandlerService, PdfUtils pdfUtils, OfficeToPdfService officeToPdfService) {
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this.fileHandlerService = fileHandlerService;
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this.pdfUtils = pdfUtils;
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this.officeToPdfService = officeToPdfService;
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}
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public static final String OFFICE_PREVIEW_TYPE_IMAGE = "image";
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public static final String OFFICE_PREVIEW_TYPE_ALL_IMAGES = "allImages";
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private static final String FILE_DIR = ConfigConstants.getFileDir();
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@Override
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public String filePreviewHandle(String url, Model model, FileAttribute fileAttribute) {
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// 预览Type，参数传了就取参数的，没传取系统默认
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String officePreviewType = fileAttribute.getOfficePreviewType();
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String baseUrl = BaseUrlFilter.getBaseUrl();
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String suffix=fileAttribute.getSuffix();
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String fileName=fileAttribute.getName();
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boolean isHtml = suffix.equalsIgnoreCase("xls") || suffix.equalsIgnoreCase("xlsx");
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String pdfName = fileName.substring(0, fileName.lastIndexOf(".") + 1) + (isHtml ? "html" : "pdf");
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String outFilePath = FILE_DIR + pdfName;
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// 判断之前是否已转换过，如果转换过，直接返回，否则执行转换
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if (!fileHandlerService.listConvertedFiles().containsKey(pdfName) || !ConfigConstants.isCacheEnabled()) {
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String filePath;
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ReturnResponse<String> response = DownloadUtils.downLoad(fileAttribute, null);
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if (0 != response.getCode()) {
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model.addAttribute("fileType", suffix);
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model.addAttribute("msg", response.getMsg());
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return "fileNotSupported";
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}
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filePath = response.getContent();
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if (StringUtils.hasText(outFilePath)) {
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officeToPdfService.openOfficeToPDF(filePath, outFilePath);
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if (isHtml) {
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// 对转换后的文件进行操作(改变编码方式)
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fileHandlerService.doActionConvertedFile(outFilePath);
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}
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if (ConfigConstants.isCacheEnabled()) {
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// 加入缓存
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fileHandlerService.addConvertedFile(pdfName, fileHandlerService.getRelativePath(outFilePath));
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}
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}
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}
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if (!isHtml && baseUrl != null && (OFFICE_PREVIEW_TYPE_IMAGE.equals(officePreviewType) || OFFICE_PREVIEW_TYPE_ALL_IMAGES.equals(officePreviewType))) {
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return getPreviewType(model, fileAttribute, officePreviewType, baseUrl, pdfName, outFilePath, pdfUtils, OFFICE_PREVIEW_TYPE_IMAGE);
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}
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model.addAttribute("pdfUrl", pdfName);
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return isHtml ? "html" : "pdf";
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}
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static String getPreviewType(Model model, FileAttribute fileAttribute, String officePreviewType, String baseUrl, String pdfName, String outFilePath, PdfUtils pdfUtils, String officePreviewTypeImage) {
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List<String> imageUrls = pdfUtils.pdf2jpg(outFilePath, pdfName, baseUrl);
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if (imageUrls == null || imageUrls.size() < 1) {
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model.addAttribute("msg", "office转图片异常，请联系管理员");
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model.addAttribute("fileType",fileAttribute.getSuffix());
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return "fileNotSupported";
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}
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model.addAttribute("imgurls", imageUrls);
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model.addAttribute("currentUrl", imageUrls.get(0));
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if (officePreviewTypeImage.equals(officePreviewType)) {
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return "officePicture";
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} else {
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return "picture";
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}
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}
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}
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