tif图片预览。根据 @gaoxingzaq 反馈和帮助,修改tif文件的jpg、pdf模式预览功能,兼容多页tif的pdf转换、jpg转换,以及jpg在线多页预览功能。
parent
20f328906c
commit
48f6a507dc
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@ -2,7 +2,6 @@ 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.FileType;
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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.ConvertPicUtil;
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@ -16,7 +15,6 @@ import org.springframework.util.StringUtils;
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import java.io.File;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.UUID;
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/**
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* tiff 图片文件处理
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@ -58,50 +56,53 @@ public class TiffFilePreviewImpl implements FilePreview {
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}else if("jpg".equalsIgnoreCase(tifPreviewType) || "pdf".equalsIgnoreCase(tifPreviewType)){
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String inputFileName = url.substring(url.lastIndexOf("/") + 1);
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String inputFileExt = inputFileName.substring(inputFileName.lastIndexOf(".") + 1);
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String uuid = UUID.randomUUID().toString().replaceAll("-","");
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String tiffFileName = uuid + "." + inputFileExt;
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String inputFileNamePrefix = inputFileName.substring(0, inputFileName.lastIndexOf("."));
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ReturnResponse<String> response = DownloadUtils.downLoad(fileAttribute, tiffFileName);
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if (response.isFailure()) {
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return NOT_SUPPORTED_FILE_PAGE;
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String strLocalTif = fileDir + inputFileName;
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File fileTiff = new File(strLocalTif);
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// 如果本地不存在这个tif文件,则下载
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if(!fileTiff.exists()){
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ReturnResponse<String> response = DownloadUtils.downLoad(fileAttribute, inputFileName);
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if (response.isFailure()) {
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return NOT_SUPPORTED_FILE_PAGE;
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}
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}
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String strTiffPath = response.getContent();
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File fileTiff = new File(strTiffPath);
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File fileJpg = ConvertPicUtil.convertPic2Jpg(strTiffPath, fileDir + uuid + ".jpg");
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if(fileJpg.exists()){
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// 转换后的tif没用了,可以删掉了
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if(fileTiff.exists()){
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fileTiff.delete();
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String baseUrl = BaseUrlFilter.getBaseUrl();
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if("pdf".equalsIgnoreCase(tifPreviewType)){
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// 以PDF模式预览的过程
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File filePdf = new File(fileDir + inputFileNamePrefix + ".pdf");
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// 如果本地不存在对应的pdf,则调用转换过程。否则直接用现有的pdf文件
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if(!filePdf.exists()){
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filePdf = ConvertPicUtil.convertTif2Pdf(strLocalTif, fileDir + inputFileNamePrefix + ".pdf");
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}
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String baseUrl = BaseUrlFilter.getBaseUrl();
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if("pdf".equalsIgnoreCase(tifPreviewType)){
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File filePdf = ConvertPicUtil.convertJpg2Pdf(fileDir + uuid + ".jpg", fileDir + uuid + ".pdf");
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if(filePdf.exists()){
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String pdfUrl = baseUrl + uuid + ".pdf";
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model.addAttribute("pdfUrl", pdfUrl);
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// 如果pdf已经存在,则将url路径加入到对象中,返回给页面
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if(filePdf.exists()){
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String pdfUrl = baseUrl + inputFileNamePrefix + ".pdf";
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model.addAttribute("pdfUrl", pdfUrl);
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return PDF_FILE_PREVIEW_PAGE;
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}
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}else{
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String jpgUrl = baseUrl + uuid + ".jpg";
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fileAttribute.setName(uuid + ".jpg");
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fileAttribute.setType(FileType.PICTURE);
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fileAttribute.setSuffix("jpg");
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fileAttribute.setUrl(jpgUrl);
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List<String> imgUrls = new ArrayList<>();
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imgUrls.add(jpgUrl);
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model.addAttribute("imgUrls", imgUrls);
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model.addAttribute("currentUrl", jpgUrl);
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return PDF_FILE_PREVIEW_PAGE;
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}
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}else{
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// 以JPG模式预览的过程
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String strJpgFilePathName = fileDir + inputFileNamePrefix + ".jpg";
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// 将tif转换为jpg,返回转换后的文件路径、文件名的list
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List<String> listPic2Jpg = ConvertPicUtil.convertTif2Jpg(strLocalTif, strJpgFilePathName);
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// 将返回页面的图片url的list对象
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List<String> listImageUrls = new ArrayList<>();
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// 循环,拼装url的list对象
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for(String strJpg : listPic2Jpg){
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listImageUrls.add(baseUrl + strJpg);
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}
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model.addAttribute("imgUrls", listImageUrls);
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model.addAttribute("currentUrl", listImageUrls.get(0));
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}
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// 转换后的tif没用了,可以删掉了
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if(fileTiff.exists()){
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fileTiff.delete();
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}
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return PICTURE_FILE_PREVIEW_PAGE;
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@ -5,55 +5,129 @@ import com.lowagie.text.Document;
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import com.lowagie.text.Image;
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import com.lowagie.text.Rectangle;
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import com.lowagie.text.pdf.PdfWriter;
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import com.sun.media.jai.codec.ImageCodec;
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import com.sun.media.jai.codec.ImageEncoder;
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import com.sun.media.jai.codec.JPEGEncodeParam;
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import com.lowagie.text.pdf.RandomAccessFileOrArray;
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import com.lowagie.text.pdf.codec.TiffImage;
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import com.sun.media.jai.codec.*;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import javax.media.jai.JAI;
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import javax.media.jai.RenderedOp;
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import java.io.*;
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import java.awt.image.RenderedImage;
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import java.awt.image.renderable.ParameterBlock;
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import java.io.File;
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import java.io.FileOutputStream;
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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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public class ConvertPicUtil {
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private final static Logger logger = LoggerFactory.getLogger(ConvertPicUtil.class);
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/**
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* 图片 转 JPG。
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* 支持输入格式如下:BMP、GIF、FlashPix、JPEG、PNG、PMN、TIFF、WBMP
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* @param strInputFile 输入文件的路径和文件名
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* Tif 转 JPG。
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* @param strInputFile 输入文件的路径和文件名
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* @param strOutputFile 输出文件的路径和文件名
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* @return
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* @return boolean 是否转换成功
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*/
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public static File convertPic2Jpg(String strInputFile, String strOutputFile) {
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// 读取源图片文件
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RenderedOp roInput = JAI.create("fileload", strInputFile);
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public static List<String> convertTif2Jpg(String strInputFile, String strOutputFile) {
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List<String> listImageFiles = new ArrayList<>();
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if (strInputFile == null || "".equals(strInputFile.trim())) {
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return null;
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}
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if (!new File(strInputFile).exists()) {
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logger.info("找不到文件【" + strInputFile + "】");
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return null;
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}
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strInputFile = strInputFile.replaceAll("\\\\", "/");
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strOutputFile = strOutputFile.replaceAll("\\\\", "/");
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FileSeekableStream fileSeekStream = null;
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try {
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strOutputFile = strOutputFile.replaceAll("\\\\", "/");
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File fileJpgPath = new File(strOutputFile.substring(0, strOutputFile.lastIndexOf("/")));
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if(!fileJpgPath.exists()){
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JPEGEncodeParam jpegEncodeParam = new JPEGEncodeParam();
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TIFFEncodeParam tiffEncodeParam = new TIFFEncodeParam();
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tiffEncodeParam.setCompression(TIFFEncodeParam.COMPRESSION_GROUP4);
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tiffEncodeParam.setLittleEndian(false);
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String strFilePrefix = strInputFile.substring(strInputFile.lastIndexOf("/") + 1, strInputFile.lastIndexOf("."));
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fileSeekStream = new FileSeekableStream(strInputFile);
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ImageDecoder imageDecoder = ImageCodec.createImageDecoder("TIFF", fileSeekStream, null);
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int intTifCount = imageDecoder.getNumPages();
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logger.info("该tif文件共有【" + intTifCount + "】页");
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String strJpgPath = "";
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String strJpgUrl = "";
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if (intTifCount == 1) {
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// 如果是单页tif文件,则转换的目标文件夹就在指定的位置
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strJpgPath = strOutputFile.substring(0, strOutputFile.lastIndexOf("/"));
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} else {
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// 如果是多页tif文件,则在目标文件夹下,按照文件名再创建子目录,将转换后的文件放入此新建的子目录中
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strJpgPath = strOutputFile.substring(0, strOutputFile.lastIndexOf("."));
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}
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// 处理目标文件夹,如果不存在则自动创建
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File fileJpgPath = new File(strJpgPath);
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if (!fileJpgPath.exists()) {
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fileJpgPath.mkdirs();
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}
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File fileJpg=new File(strOutputFile);
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OutputStream ops = new FileOutputStream(fileJpg);
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// 文件存储输出流
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JPEGEncodeParam param = new JPEGEncodeParam();
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ImageEncoder image = ImageCodec.createImageEncoder("JPEG", ops,
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param); // 指定输出格式
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// 解析输出流进行输出
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image.encode(roInput);
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// 关闭流
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ops.close();
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// 循环,处理每页tif文件,转换为jpg
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for (int i = 0; i < intTifCount; i++) {
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String strJpg = "";
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if(intTifCount == 1){
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strJpg = strJpgPath + "/" + strFilePrefix + ".jpg";
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strJpgUrl = strFilePrefix + ".jpg";
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}else{
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strJpg = strJpgPath + "/" + i + ".jpg";
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strJpgUrl = strFilePrefix + "/" + i + ".jpg";
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}
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return fileJpg;
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} catch (FileNotFoundException e) {
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e.printStackTrace();
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} catch (Exception e) {
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File fileJpg = new File(strJpg);
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// 如果文件不存在,则生成
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if(!fileJpg.exists()){
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RenderedImage renderedImage = imageDecoder.decodeAsRenderedImage(i);
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ParameterBlock pb = new ParameterBlock();
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pb.addSource(renderedImage);
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pb.add(fileJpg.toString());
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pb.add("JPEG");
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pb.add(jpegEncodeParam);
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RenderedOp renderedOp = JAI.create("filestore", pb);
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renderedOp.dispose();
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logger.info("每页分别保存至: " + fileJpg.getCanonicalPath());
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}else{
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logger.info("JPG文件已存在: " + fileJpg.getCanonicalPath());
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}
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listImageFiles.add(strJpgUrl);
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}
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return listImageFiles;
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} catch (IOException e) {
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e.printStackTrace();
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return null;
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} finally {
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if (fileSeekStream != null) {
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try {
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fileSeekStream.close();
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} catch (IOException e) {
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}
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fileSeekStream = null;
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}
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}
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return null;
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}
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/**
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* 将Jpg图片转换为Pdf文件
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*
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* @param strJpgFile 输入的jpg的路径和文件名
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* @param strPdfFile 输出的pdf的路径和文件名
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* @return
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@ -61,7 +135,8 @@ public class ConvertPicUtil {
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public static File convertJpg2Pdf(String strJpgFile, String strPdfFile) {
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Document document = new Document();
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// 设置文档页边距
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document.setMargins(0,0,0,0);
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document.setMargins(0, 0, 0, 0);
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FileOutputStream fos = null;
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try {
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fos = new FileOutputStream(strPdfFile);
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@ -70,8 +145,8 @@ public class ConvertPicUtil {
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document.open();
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// 获取图片的宽高
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Image image = Image.getInstance(strJpgFile);
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float floatImageHeight=image.getScaledHeight();
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float floatImageWidth=image.getScaledWidth();
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float floatImageHeight = image.getScaledHeight();
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float floatImageWidth = image.getScaledWidth();
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// 设置页面宽高与图片一致
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Rectangle rectangle = new Rectangle(floatImageWidth, floatImageHeight);
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document.setPageSize(rectangle);
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@ -101,5 +176,62 @@ public class ConvertPicUtil {
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return null;
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}
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}
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/**
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* 将Tif图片转换为Pdf文件(支持多页Tif)
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*
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* @param strTifFile 输入的tif的路径和文件名
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* @param strPdfFile 输出的pdf的路径和文件名
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* @return
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*/
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public static File convertTif2Pdf(String strTifFile, String strPdfFile) {
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try {
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RandomAccessFileOrArray rafa = new RandomAccessFileOrArray(strTifFile);
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Document document = new Document();
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// 设置文档页边距
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document.setMargins(0, 0, 0, 0);
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PdfWriter.getInstance(document, new FileOutputStream(strPdfFile));
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document.open();
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int intPages = TiffImage.getNumberOfPages(rafa);
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Image image;
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File filePDF;
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if(intPages == 1){
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String strJpg = strTifFile.substring(0, strTifFile.lastIndexOf(".")) + ".jpg";
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File fileJpg = new File(strJpg);
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List<String> listPic2Jpg = convertTif2Jpg(strTifFile, strJpg);
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if(listPic2Jpg != null && fileJpg.exists()){
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filePDF = convertJpg2Pdf(strJpg, strPdfFile);
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}
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}else{
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for (int i = 1; i <= intPages; i++) {
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image = TiffImage.getTiffImage(rafa, i);
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// 设置页面宽高与图片一致
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Rectangle pageSize = new Rectangle(image.getScaledWidth(), image.getScaledHeight());
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document.setPageSize(pageSize);
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// 图片居中
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image.setAlignment(Image.ALIGN_CENTER);
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//新建一页添加图片
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document.newPage();
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document.add(image);
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}
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document.close();
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}
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rafa.close();
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filePDF = new File(strPdfFile);
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return filePDF;
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} catch (Exception e) {
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System.out.println(e.toString());
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}
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return null;
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}
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}
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