Java 使用jacob实现各类办公文档（ppt，Excel，word，text，imge）转换成PDF

//代码中都有注释，使用注解的地方大家可以略过

package com.frank.demo.file.common.util;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.UUID;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.data.mongodb.gridfs.GridFsTemplate;
import org.springframework.stereotype.Component;
import com.jacob.activeX.ActiveXComponent;
import com.jacob.com.ComThread;
import com.jacob.com.Dispatch;
import com.jacob.com.Variant;
import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Image;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.PdfWriter;
import com.mongodb.gridfs.GridFSDBFile;

@Component
public class FlieToPdfUtil {

@Autowired
private GridFsTemplate fileRepository;

private static final int wdFormatPDF = 17;
private static final int xlTypePDF = 0;
private static final int ppSaveAsPDF = 32;

// 记录日志信息
private static Logger logger = LoggerFactory.getLogger(FlieToPdfUtil.class);

public ByteArrayOutputStream fileToPdf(String fileId) throws Exception {
GridFSDBFile gridFSDBFile = fileRepository.findOne(new Query(Criteria.where("_id").is(fileId)));
if (null != gridFSDBFile) {
String type = this.getFileSufix(gridFSDBFile.getFilename());
String folder = System.getProperty("java.io.tmpdir");
if (type.equalsIgnoreCase("doc") || type.equalsIgnoreCase("docx") || type.equalsIgnoreCase("txt") || type.equalsIgnoreCase("wps")) {
StringBuffer filePath = new StringBuffer();
String name = this.generateToken();
filePath.append(folder);
filePath.append(name);
filePath.append("." + type);
this.readFile(gridFSDBFile, filePath.toString());
StringBuffer pdfPath = new StringBuffer();
pdfPath.append(folder);
pdfPath.append(name);
pdfPath.append(".pdf");
this.wordToPDF(filePath.toString(), pdfPath.toString());
this.deleteFile(filePath.toString());
return this.getBytes(pdfPath.toString());
} else if (type.equalsIgnoreCase("ppt") || type.equalsIgnoreCase("pptx")) {
StringBuffer filePath = new StringBuffer();
String name = this.generateToken();
filePath.append(folder);
filePath.append(name);
filePath.append("." + type);
this.readFile(gridFSDBFile, filePath.toString());
StringBuffer pdfPath = new StringBuffer();
pdfPath.append(folder);
pdfPath.append(name);
pdfPath.append(".pdf");
this.pptToPDF(filePath.toString(), pdfPath.toString());
this.deleteFile(filePath.toString());
return this.getBytes(pdfPath.toString());
} else if (type.equalsIgnoreCase("xls") || type.equalsIgnoreCase("xlsx")) {
StringBuffer filePath = new StringBuffer();
String name = this.generateToken();
filePath.append(folder);
filePath.append(name);
filePath.append("." + type);
this.readFile(gridFSDBFile, filePath.toString());
StringBuffer pdfPath = new StringBuffer();
pdfPath.append(folder);
pdfPath.append(name);
pdfPath.append(".pdf");
this.excelToPDF(filePath.toString(), pdfPath.toString());
this.deleteFile(filePath.toString());
return this.getBytes(pdfPath.toString());
} else if (type.equalsIgnoreCase("jpg") || type.equalsIgnoreCase("png") || type.equalsIgnoreCase("jpeg") || type.equalsIgnoreCase("gif")) {
StringBuffer filePath = new StringBuffer();
String name = this.generateToken();
filePath.append(folder);
filePath.append(name);
filePath.append("." + type);
this.readFile(gridFSDBFile, filePath.toString());
StringBuffer pdfPath = new StringBuffer();
pdfPath.append(folder);
pdfPath.append(name);
pdfPath.append(".pdf");
this.imgToPDF(filePath.toString(), pdfPath.toString());
this.deleteFile(filePath.toString());
return this.getBytes(pdfPath.toString());
} else {
InputStream is = gridFSDBFile.getInputStream();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len;
while ((len = is.read(buffer)) > -1) {
baos.write(buffer, 0, len);
}
is.close();
baos.flush();
return baos;
}
} else {
throw new Exception("文件不存在！");
}
}

/**
* 删除单个文件
*
* @param sPath
* 被删除文件的文件名
* @return 单个文件删除成功返回true，否则返回false
*/
public boolean deleteFile(String sPath) {
boolean flag = false;
File file = new File(sPath);
// 路径为文件且不为空则进行删除
if (file.isFile() && file.exists()) {
file.delete();
flag = true;
}
return flag;
}

/**
* 写入当前文件
*/
public void readFile(GridFSDBFile gridFSDBFile, String filePath) throws Exception {
InputStream is = gridFSDBFile.getInputStream();
FileOutputStream os = new FileOutputStream(filePath);
int index = 0;
while ((index = is.read()) != -1) {
os.write(index);
}
is.close();
os.close();
}

/**
* 获取pdf文件输出流
*/
public ByteArrayOutputStream getBytes(String filePath) {
File file = new File(filePath);
ByteArrayOutputStream out = null;
try {
FileInputStream in = new FileInputStream(file);
out = new ByteArrayOutputStream();
byte[] b = new byte[1024];
while ((in.read(b)) != -1) {
out.write(b, 0, b.length);
}
out.close();
in.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
this.deleteFile(filePath.toString());
return out;
}

/**
* 获取随机名称
*/
public String generateToken() throws Exception {
return UUID.randomUUID().toString().replace("-", "");
}

/***
* 判断文件类型
*
* @param fileName
* @return
*/
public String getFileSufix(String fileName) {
int splitIndex = fileName.lastIndexOf(".");
return fileName.substring(splitIndex + 1);
}

/**
* Word转PDF
*/
private void wordToPDF(String inputFile, String pdfFile) {
logger.info("启动 Word...");
long start = System.currentTimeMillis();
ActiveXComponent app = null;
Dispatch doc = new Dispatch();
try {
logger.info("进入转换PDF程序");
app = new ActiveXComponent("Word.Application");
Dispatch xlo = (Dispatch) (app.getObject());
try {
logger.info("version=" + app.getProperty("Version"));
logger.info("version=" + Dispatch.get(xlo, "Version"));
} catch (Exception e) {
e.printStackTrace();
}
app.setProperty("Visible", new Variant(false));
Dispatch docs = app.getProperty("Documents").toDispatch();
doc = Dispatch.call(docs, "Open", inputFile).toDispatch();
logger.info("打开文档..." + inputFile);
logger.info("转换文档到 PDF..." + pdfFile);
File tofile = new File(pdfFile);
if (tofile.exists()) {
tofile.delete();
}
Dispatch.call(doc, "SaveAs", pdfFile, // FileName
wdFormatPDF);
long end = System.currentTimeMillis();
logger.info("转换完成..用时：" + (end - start) + "ms.");

} catch (Exception e) {
logger.info("========Error:文档转换失败：" + e.getMessage());
} finally {
Dispatch.call(doc, "Close", false);
System.out.println("关闭文档");
if (app != null)
app.invoke("Quit", new Variant[] {});
// 如果没有这句话,winword.exe进程将不会关闭
ComThread.Release();
}

}

/**
* Excel转化成PDF
*/
private void excelToPDF(String inputFile, String pdfFile) {
ActiveXComponent ax = null;
Dispatch excel = null;
try {
ComThread.InitSTA(true);
logger.info("进入转换PDF程序");
ax = new ActiveXComponent("KET.Application");
logger.info("开始转换Excel为PDF...");
long start = System.currentTimeMillis();
ax.setProperty("Visible", false);
ax.setProperty("AutomationSecurity", new Variant(3)); // 禁用宏
Dispatch excels = ax.getProperty("Workbooks").toDispatch();
excel = Dispatch.invoke(excels, "Open", Dispatch.Method, new Object[] { inputFile, new Variant(false), new Variant(false) }, new int[9]).toDispatch();
Dispatch sheet;
// 横向打印设置多个Sheet
Dispatch sheets = Dispatch.get(excel, "Sheets").toDispatch();
// 获得几个sheet
int count = Dispatch.get(sheets, "Count").getInt();
System.out.println(count);
if (1 < count) {
sheet = Dispatch.invoke(sheets, "Item", Dispatch.Get, new Object[] { new Integer(2) }, new int[1]).toDispatch();
} else {
sheet = Dispatch.get(excel, "ActiveSheet").toDispatch();
}
Dispatch pageSetup = Dispatch.get(sheet, "PageSetup").toDispatch();
Dispatch.put(pageSetup, "Orientation", new Variant(2)); // Variant(2)横向打印
// 设置边距
Dispatch.put(pageSetup, "CenterVertically", true);
// Dispatch.put(pageSetup, "LeftMargin", 0);
// Dispatch.put(pageSetup, "RightMargin", 0);
Dispatch.put(pageSetup, "TopMargin", 10);
Dispatch.put(pageSetup, "BottomMargin", 10);
Dispatch.put(pageSetup, "PrintGridlines", true);
// 设置打印纸张
// Dispatch.put(pageSetup, "PaperSize", 8);
// 设置缩放
// Dispatch.put(pageSetup, "Zoom", 49);
// 转换格式
Dispatch.invoke(excel, "ExportAsFixedFormat", Dispatch.Method, new Object[] { new Variant(0), // PDF格式=0
pdfFile, new Variant(xlTypePDF) // 0=标准 (生成的PDF图片不会变模糊)
// 1=最小文件
// (生成的PDF图片糊的一塌糊涂)
}, new int[1]);
long end = System.currentTimeMillis();
logger.info("转换完成..用时：" + (end - start) + "ms.");
} catch (Exception e) {
// TODO: handle exception
logger.info("========Error:文档转换失败：" + e.getMessage());
} finally {
Dispatch.call(excel, "Close", new Variant(false));
if (ax != null) {
ax.invoke("Quit", new Variant[] {});
ax = null;
}
ComThread.Release();
}
}

/**
* ppt转化成PDF
*/
private void pptToPDF(String inputFile, String pdfFile) {
ActiveXComponent app = null;
Dispatch ppt = new Dispatch();
try {
logger.info("进入转换PDF程序");
ComThread.InitSTA(true);
app = new ActiveXComponent("KWPP.Application");
// app.setProperty("Visible", false);
logger.info("开始转化PPT为PDF...");
long start = System.currentTimeMillis();
Dispatch ppts = app.getProperty("Presentations").toDispatch();
ppt = Dispatch.call(ppts, "Open", inputFile, true, // ReadOnly
// false, // Untitled指定文件是否有标题
false// WithWindow指定文件是否可见
).toDispatch();
Dispatch.invoke(ppt, "SaveAs", Dispatch.Method, new Object[] { pdfFile, new Variant(ppSaveAsPDF) }, new int[1]);
long end = System.currentTimeMillis();
logger.info("转换完成..用时：" + (end - start) + "ms.");
} catch (Exception e) {
// TODO: handle exception
logger.info("========Error:文档转换失败：" + e.getMessage());
} finally {
Dispatch.call(ppt, "Close");
if (app != null)
app.invoke("Quit", new Variant[] {});
// 如果没有这句话,winword.exe进程将不会关闭
ComThread.Release();
}
}

private void imgToPDF(String imgFilePath, String pdfFilePath) {
File file = new File(imgFilePath);
if (file.exists()) {
Document document = null;
FileOutputStream fos = null;
try {
// 读取一个图片
Image image = Image.getInstance(imgFilePath);
float imageHeight = image.getScaledHeight();
float imageWidth = image.getScaledWidth();
int i = 0;
while (imageHeight > 500 || imageWidth > 500) {
image.scalePercent(100 - i);
i++;
imageHeight = image.getScaledHeight();
imageWidth = image.getScaledWidth();
}
image.setAlignment(Image.ALIGN_CENTER);
// 文档页面宽高为图片宽高
Rectangle rect = new Rectangle(imageWidth, imageHeight);
document = new Document(rect);
// 读取文件流，创建可读写的文件
fos = new FileOutputStream(pdfFilePath);
PdfWriter.getInstance(document, fos);
// 设置文档边距
document.setMargins(0, 0, 0, 0);
// 打开文档
document.open();
// 插入一个图片
document.add(image);
} catch (DocumentException de) {
System.out.println(de.getMessage());
} catch (IOException ioe) {
System.out.println(ioe.getMessage());
}
document.close();
try {
fos.flush();
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}

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