用JAVA如何实现word文档在线预览
1.思路,利用FTL（freemarker）生成word文档
2.利用免费工具aspose将word转换PDF
３使用PDF.JS在线预览。
第一步比较多，就不一一代码。本次主要讲2，3步
源码如下：AsposeUtil.java,把word转换PDF，存放本地，
1.需要JAR包
百度网盘 请输入提取码 提取码： 630z
2.配置POM.xml
com.aspose
aspose-words
0.0.1-SNAPSHOT
system
${project.basedir}/outlib/aspose-words-16.8.0-jdk16.jar
com.aspose
aspose-cells
0.0.1-SNAPSHOT
system
${project.basedir}/outlib/aspose-cells-8.5.2(1).jar
com.aspose
aspose-slides
0.0.1-SNAPSHOT
system
${project.basedir}/outlib/aspose.slides-15.9.0.jar
cn.hutool
hutool-core
5.6.5
3.配置，防止乱码， license.xml代码内容
Aspose.Total for Java
Aspose.Words for Java
Enterprise
20991231
20991231
8bfe198c-7f0c-4ef8-8ff0-acc3237bf0d7
sNLLKGMUdF0r8O1kKilWAGdgfs2BvJb/2Xp8p5iuDVfZXmhppo+d0Ran1P9TKdjV4ABwAgKXxJ3jcQTqE/2IRfqwnPf8itN8aFZlV3TJPYeD3yWE7IT55Gz6EijUpC7aKeoohTb4w2fpox58wWoF3SNp6sK6jDfiAUGEHYJ9pjU=
4.WORD转PDF源码：
package com.bootdo.common.utils;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.math.RoundingMode;
import java.text.DecimalFormat;
import com.aspose.cells.PdfSaveOptions;
import com.aspose.cells.Workbook;
import com.aspose.slides.Presentation;
import com.aspose.words.Document;
import com.aspose.words.SaveFormat;
public class AsposeUtil {
/**
* 获取license
*
* @return
*/
public static boolean getLicense(int type) {
boolean result = false;
try {
InputStream is = AsposeUtil.class.getClassLoader().getResourceAsStream("license.xml");
if (type == 1) {//excel
com.aspose.cells.License aposeLic = new com.aspose.cells.License();
aposeLic.setLicense(is);
result = true;
} else if (type == 2) {//word
com.aspose.words.License aposeLic = new com.aspose.words.License();
aposeLic.setLicense(is);
result = true;
} else {//ppt
com.aspose.slides.License aposeLic = new com.aspose.slides.License();
aposeLic.setLicense(is);
result = true;
}
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
public static void Excel2Pdf(String officePath,String OutPutPath,String officeName) {
// 验证License
if (!getLicense(1)) {
return;
}
try {
File file = new File(OutPutPath);
if (!file.exists()) {
file.mkdirs();
}
// long old = Sysout.currentTimeMillis();
Workbook wb = new Workbook(officePath);// 原始excel路径
File pdfFile = new File(OutPutPath+officeName);// 输出路径
FileOutputStream fileOS = new FileOutputStream(pdfFile);
//wb.save(fileOS, com.aspose.cells.SaveFormat.PDF);
PdfSaveOptions pdfSaveOptions = new PdfSaveOptions();
pdfSaveOptions.setAllColumnsInOnePagePerSheet(true);
wb.save(fileOS, pdfSaveOptions);
// long now = Sysout.currentTimeMillis();
// Sysout.println("共耗时：" + ((now - old) / 1000.0) + "秒");
} catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) throws Exception {
AsposeUtil bean = new AsposeUtil();
// bean.word2Pdf2("D:\\pdf\\12.docx","D:\\pdf\\12.pdf");
bean.word2Pdf2("C:\\wordTemple\\han.docx","C:\\wordTemple\\1234.pdf");
}
public void word2Pdf2(String inpath,String outpath) throws Exception {
if (!getLicense(2)) {
System.out.println("非法------------");
return;
}
long old = System.currentTimeMillis();
File file = new File(outpath);
FileOutputStream os = new FileOutputStream(file);
//解决乱码
//如果是windows执行，不需要加这个
//TODO 如果是linux执行，需要添加这个*****
//FontSettings.setFontsFolder("/usr/share/fonts",true);
Document doc = new Document(inpath);
//全面支持DOC, DOCX, OOXML, RTF HTML, OpenDocument, PDF, EPUB, XPS, SWF 相互转换
doc.save(os, SaveFormat.PDF);
long now = System.currentTimeMillis();
System.out.println("共耗时：" + ((now - old) / 1000.0) + "秒");
}
public static void Word2Pdf(String officePath,String OutPutPath,String officeName) {
// 验证License
if (!getLicense(2)) {
return;
}
try {
File file = new File(OutPutPath);
if (!file.exists()) {
file.mkdirs();
}
Document doc = new Document(officePath);// 原始word路径
File pdfFile = new File(OutPutPath+officeName);// 输出路径
FileOutputStream fileOS = new FileOutputStream(pdfFile);
doc.save(fileOS, com.aspose.words.SaveFormat.PDF);
} catch (Exception e) {
e.printStackTrace();
}
}
public static void PPT2Pdf(String officePath,String OutPutPath,String officeName) {
// 验证License
if (!getLicense(3)) {
return;
}
try {
File PathFile = new File(OutPutPath);
if (!PathFile.exists()) {
PathFile.mkdirs();
}
InputStream slides = new FileInputStream(new File(officePath));// 原始ppt路径
Presentation pres = new Presentation(slides);
File file = new File(OutPutPath+officeName);// 输出pdf路径
FileOutputStream fileOS = new FileOutputStream(file);
pres.save(fileOS, com.aspose.slides.SaveFormat.Pdf);
} catch (Exception e) {
e.printStackTrace();
}
}
public static String OfficeToPdf(String officePath) {
//G:/product/WebApp/fwis_develop/com/is/flywings/oa/attchfile/1000000000/i0002/101951.docx⌒101951.docx⌒feiyu.docx
String[] split = officePath.split("⌒");
int lastIndex = split[0].lastIndexOf(".");
int lastNameIndex = split[0].lastIndexOf("/");
String officeType = split[0].substring(lastIndex+1);
String officeName = split[0].substring(lastNameIndex+1,lastIndex)+".pdf";
String OutPutPath = split[0].substring(0,lastNameIndex+1)+"office/";
File file = new File(split[0]);
File pdfFile = new File(OutPutPath+officeName);
//判断当前office文件是否已经转为PDF,如果已转为PDF就不需要再次转换。
if(pdfFile.exists()){
return OutPutPath+officeName;
}
if (file.exists()) {
double bytes = file.length();
double kilobytes = (bytes / 1024);
double megabytes = (kilobytes / 1024);
DecimalFormat df = new DecimalFormat("0.00");
df.setRoundingMode(RoundingMode.HALF_UP);
String MB = df.format(megabytes);
Double Size = Double.parseDouble(MB);
if(Size>10){
return Size+"MB";
}
//"doc", "docx", "xls","xlsx", "ppt", "pptx"
try {
if(officeType.equals("doc")||officeType.equals("docx")){
Word2Pdf(split[0],OutPutPath,officeName);
}else if(officeType.equals("xls")||officeType.equals("xlsx")){
Excel2Pdf(split[0],OutPutPath,officeName);
}else if(officeType.equals("ppt")||officeType.equals("pptx")){
PPT2Pdf(split[0],OutPutPath,officeName);
}else{
System.out.println("无法识别该文件！");
return "Error";
}
} catch (Exception e) {
e.printStackTrace();
}
} else {
return "NotExists";
}
return OutPutPath+officeName;
}
}
第二步就完成了，接下来下载PDF.js
- pdf.js文件 下载后放入到项目静态文件夹（下载地址：PDF.js）
- 可运行的springboot项目
首先为了直观的展示，springboot直接返回一个写死文件路径的输出流
前端获取展示
pdf预览
在线阅读PDF文件
/mypdf/web/viewer.html是下载的PDF文件包(放在static文件路径下)，后面的路径是接口的方法，可通过传id等参数查询生成word
我的方法是：
//生成采集文件文档
@GetMapping("/api/file/onlinePreview/{id}")
void onlinePreview(@PathVariable("id") String id, HttpServletResponse response, HttpServletRequest request,HttpSession session,Model model) throws Exception{
//生成word文档
Random rd=new Random();
String url="docs/xiewai.docx";
HashMap parm=new HashMap();
parm.put("id", id);
List list=warningRecordService.listXiewai(parm);
DocumentHandler dh=new DocumentHandler();
response.setContentType("text/html;charset=utf-8");
request.setCharacterEncoding("UTF-8");
String filename = dh.createTaskReportDoc(list,id);
model.addAttribute("filename",tem+"files/"+filename);
AsposeUtil bean = new AsposeUtil();
// bean.word2Pdf2("D:\\pdf\\12.docx","D:\\pdf\\12.pdf");
String inpath=loadAddress+"\\"+filename;
String curr="X"+System.currentTimeMillis()+rd.nextInt(1000);
String outPath=loadAddress+"\\"+curr+".pdf";
bean.word2Pdf2(inpath,outPath);
File f = new File(outPath);
if (f.exists()) {
byte[] data = null;
FileInputStream input=null;
try {
input= new FileInputStream(f);
data = new byte[input.available()];
input.read(data);
response.getOutputStream().write(data);
} catch (Exception e) {
System.out.println("pdf文件处理异常：" + e);
}finally{
try {
if(input!=null){
input.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
} 这样就可以在线预览了
另外附上生成word 表格的代码,填充word的数据
public String createHanReportDoc(List list,String id,String showname) throws Exception {
// 创建数据
//Map dataMap = new HashMap();
//dataMap =getTaskReportData(dataMap, list);
XieWaiDO dataMap = new XieWaiDO();
dataMap =list.get(0);
// 获取模板
String mjinfoJson=dataMap.getXwMjInfo();
StringBuffer sb=new StringBuffer();
List mjInfo = new ArrayList();
if(mjinfoJson!=null&&!mjinfoJson.equals("")){
JSONArray json=JSONArray.parseArray(mjinfoJson);
if(json.size()>0){
for(int i=0;i