java通过jacob实现office在线预览功能
人气:0简介:
这篇文章中的代码都是参考于网上的,只做一个记录。主要做的就是实现一个office在线预览功能。
第一步:装office
第二步:下载jacob
打开网址下载,目前最新的是1.19版本。
第三步:配置jdk
解压下载完的jacob压缩包,根据jdk的版本选择dll中的一个,放入/jdk/jre/bin中。
第四步:在项目中引入jar包
在maven官网上找不到com.jacob的jar包,只能手动引入,这个jar包在jacob的压缩包中有。
<dependency> <groupId>com.jacob</groupId> <artifactId>jacob</artifactId> <version>1.19</version> <scope>system</scope> <systemPath>${project.basedir}/lib/jacob.jar</systemPath> </dependency>
第五步:将office转化为pdf文件
这里需要再次说明,这个代码不是我写的,这里只是做个记录,方便下次用到的时候直接使用。
import org.springframework.web.bind.annotation.RequestMapping; import javax.servlet.http.HttpServletResponse; import com.jacob.activeX.ActiveXComponent; import com.jacob.com.ComThread; import com.jacob.com.Dispatch; import com.jacob.com.Variant; import org.springframework.web.bind.annotation.RestController; import java.io.*; @RestController public class PdfConvert { @RequestMapping("/PdfConvert.do") public void PdfConvert(HttpServletResponse response) { String path = "C:\\Users\\acer\\Desktop\\测试.doc"; String path2 = "C:\\Users\\acer\\Desktop\\测试.pdf"; word2PDF(path, path2); String path3 = "C:\\Users\\acer\\Desktop\\测试2.ppt"; String path4 = "C:\\Users\\acer\\Desktop\\测试2.pdf"; ppt2PDF(path3, path4); String path5 = "C:\\Users\\acer\\Desktop\\测试3.xls"; String path6 = "C:\\Users\\acer\\Desktop\\测试3.pdf"; excel2PDF(path5, path6); } public boolean word2PDF(String inputFile, String pdfFile) { ActiveXComponent app = new ActiveXComponent("Word.Application"); try { app.setProperty("Visible", false); Dispatch docs = app.getProperty("Documents").toDispatch(); Dispatch doc = Dispatch.call(docs, "Open", new Object[]{inputFile, false, true}).toDispatch(); Dispatch.call(doc, "ExportAsFixedFormat", new Object[]{pdfFile, 17}); Dispatch.call(doc, "Close", new Object[]{false}); app.invoke("Quit", 0); return true; } catch (Exception var6) { app.invoke("Quit", 0); return false; } } public boolean excel2PDF(String inputFile, String pdfFile) { ComThread.InitSTA(true); ActiveXComponent app = new ActiveXComponent("Excel.Application"); try { app.setProperty("Visible", false); app.setProperty("AutomationSecurity", new Variant(3)); Dispatch excels = app.getProperty("Workbooks").toDispatch(); Dispatch excel = Dispatch.invoke(excels, "Open", 1, new Object[]{inputFile, new Variant(false), new Variant(false)}, new int[9]).toDispatch(); Dispatch.invoke(excel, "ExportAsFixedFormat", 1, new Object[]{new Variant(0), pdfFile, new Variant(0)}, new int[1]); Dispatch.call(excel, "Close", new Object[]{false}); if (app != null) { app.invoke("Quit", new Variant[0]); app = null; } ComThread.Release(); return true; } catch (Exception var6) { app.invoke("Quit"); return false; } } public boolean ppt2PDF(String inputFile, String pdfFile) { ActiveXComponent app = new ActiveXComponent("PowerPoint.Application"); try { Dispatch ppts = app.getProperty("Presentations").toDispatch(); Dispatch ppt = Dispatch.call(ppts, "Open", new Object[]{inputFile, true, true, false}).toDispatch(); Dispatch.call(ppt, "SaveAs", new Object[]{pdfFile, 32}); Dispatch.call(ppt, "Close"); app.invoke("Quit"); return true; } catch (Exception var6) { app.invoke("Quit"); return false; } } }
第六步:在页面上展示pdf
后端:
@RequestMapping("/GetPdf.do") public void GetPdf(HttpServletResponse response) { //从数据库中查出文件位置和文件名字 String pdfpath = "C:\\Users\\acer\\Desktop\\测试.pdf"; String pdfname = "测试"; try { File file = new File(pdfpath); if (!file.exists()) { response.getWriter().write("该文档生成pdf失败,请下载文档查看"); return; } InputStream fis = new FileInputStream(pdfpath); byte[] buffer = new byte[1024]; response.reset(); response.addHeader("Content-Disposition", "inline;filename=" + java.net.URLEncoder.encode(pdfname, "UTF-8")); response.addHeader("Content-Length", "" + file.length()); response.setContentType("application/pdf"); OutputStream toClient = new BufferedOutputStream(response.getOutputStream()); int nbytes = 0; while ((nbytes = fis.read(buffer)) != -1) { toClient.write(buffer, 0, nbytes); toClient.flush(); } toClient.flush(); toClient.close(); fis.close(); } catch (Exception ex) { ex.printStackTrace(); } }
前端:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"/> <title>pdf在线预览</title> </head> <body> <div style=" width: 100%; height: 100%;"> <embed src="/GetPdf.do" type="application/pdf" style="overflow: auto; width: 100%; height: 800px;" /> </div> </body> </html>
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