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file-online-preview
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优化：（内部）移除为pdf文档提供base64缩略图

pull/12/head
陈精华 2019-10-24 09:42:51 +08:00 committed by kl
parent 1060bdd00f
commit 19d1ba6cf9
1 changed files with 0 additions and 86 deletions
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86
jodconverter-web/src/main/java/cn/keking/web/controller/OnlinePreviewController.java
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@ -8,10 +8,6 @@ import cn.keking.service.FilePreviewFactory;
import cn.keking.service.cache.CacheService;
import cn.keking.utils.FileUtils;
import org.apache.commons.io.IOUtils;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;
import org.apache.pdfbox.tools.imageio.ImageIOUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
@ -24,11 +20,9 @@ import org.springframework.web.bind.annotation.ResponseBody;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.*;
import java.util.Arrays;
import java.util.Base64;
import java.util.List;
/**
@ -132,86 +126,6 @@ public class OnlinePreviewController {
}
}
@RequestMapping(value = "/getPDFImage", method = RequestMethod.GET)
@ResponseBody
public String getPDFImage(String urlPath, Integer dpi, Integer page) {
FileAttribute fileAttribute = fileUtils.getFileAttribute(urlPath);
String fileName = fileAttribute.getName();
String fullFileName = fileDir + fileName;
String result = "";
InputStream is = null;
try {
File dirFile = new File(fileDir);
if (!dirFile.exists()) {
dirFile.mkdirs();
}
String strUrl = urlPath.trim();
URL url = new URL(new URI(strUrl).toASCIIString());
//打开请求连接
URLConnection connection = url.openConnection();
HttpURLConnection httpURLConnection = (HttpURLConnection) connection;
httpURLConnection.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
is = httpURLConnection.getInputStream();
FileOutputStream os = new FileOutputStream(fullFileName);
byte[] buffer = new byte[4 * 1024];
int read;
while ((read = is.read(buffer)) > 0) {
os.write(buffer, 0, read);
}
os.close();
try {
String imageFileSuffix = ".jpg";
File pdfFile = new File(fullFileName);
PDDocument doc = PDDocument.load(pdfFile);
int pageCount = doc.getNumberOfPages();
if (page >= pageCount) {
return result;
}
PDFRenderer pdfRenderer = new PDFRenderer(doc);
int index = fullFileName.lastIndexOf(".");
String folder = fullFileName.substring(0, index);
File path = new File(folder);
if (!path.exists()) {
path.mkdirs();
}
String imageFilePath;
imageFilePath = folder + File.separator + page + imageFileSuffix;
BufferedImage image = pdfRenderer.renderImageWithDPI(page, dpi, ImageType.RGB);
ImageIOUtil.writeImage(image, imageFilePath, dpi);
File imgFile = new File(imageFilePath);
FileInputStream in = new FileInputStream(imgFile);
ByteArrayOutputStream out = new ByteArrayOutputStream();
byte[] b = new byte[1024];
int i = 0;
while ((i = in.read(b)) != -1) {
out.write(b, 0, b.length);
}
out.close();
in.close();
String base64Image = "data:image/jpeg;base64," + Base64.getEncoder().encodeToString(out.toByteArray());
out.close();
result = base64Image;
doc.close();
} catch (IOException e) {
LOGGER.error("Convert pdf to jpg exception", e);
}
} catch (IOException | URISyntaxException e) {
LOGGER.error("下载pdf文件失败", e);
} finally {
if (is != null) {
IOUtils.closeQuietly(is);
}
}
return result;
}
/**
* 通过api接口入队
* @param url 请编码后在入队