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>
