springboot项目使用aspose预览office文件，运行实现预览效果：
主要实现原理是：浏览器可以直接预览pdf,所以使用aspose把office文件转换为pdf文件，进行预览。
1.主要写了个简单的demo,项目目录:
2.pom.xml添加aspose的依赖包
（目前maven仓库不提供以下aspose的依赖包，可以自行下载添加进maven仓库，或者直接拉到最下面下载本人demo，demo提供了相应的jar包）
<!--aspose预览office文件-->
<dependency>
<groupId>com.aspose</groupId>
<artifactId>aspose-slides</artifactId>
<version>19.3</version>
</dependency>
<dependency>
<groupId>com.aspose</groupId>
<artifactId>aspose-cells</artifactId>
<version>8.5.2</version>
</dependency>
<dependency>
<groupId>com.aspose</groupId>
<artifactId>aspose-words</artifactId>
<version>15.8.0</version>
</dependency>
<!--end-->
把jar包放在d盘，然后cmd，执行命令把jar包加进maven仓库
mvn install:install-file -Dfile=D:\jar\aspose-words-15.8.0.jar -DgroupId=com.aspose -DartifactId=aspose-words -Dversion=15.8.0 -Dpackaging=jar mvn install:install-file -Dfile=D:\jar\aspose-cells-8.5.2.jar -DgroupId=com.aspose -DartifactId=aspose-cells -Dversion=8.5.2 -Dpackaging=jar mvn install:install-file -Dfile=D:\jar\aspose.slides-19.3.jar -DgroupId=com.aspose -DartifactId=aspose-slides -Dversion=19.3 -Dpackaging=jar
3.后端主要代码：
@Controller
public class FileController {
@Autowired
private FileToPdfComUtils fileToPdfComUtils;
/**
* index页面
* @return
*/
@GetMapping("/index")
public String index(){
return "index";
}
/**
* 文件预览
* @param filePath
* @param request
* @param response
* @throws IOException
*/
@GetMapping("/showFile")
@ResponseBody
public void showFile(String filePath, HttpServletRequest request, HttpServletResponse response) throws IOException {
//源文件路径
String sourcePath = filePath;
//pdf文件路径
String pdfPath = null;
//获取文件后缀判断是否转换pdf
int index = filePath.lastIndexOf(".");
String fileType = filePath.substring(index + 1);
String toPdfSuffix = "doc,docx,xls,xlsx,ppt,pptx";
try {
if(toPdfSuffix.indexOf(fileType) >= 0){
pdfPath = sourcePath.substring(0, index) + ".pdf";
//源文件转换pdf
fileToPdfComUtils.officeToPdf(sourcePath, pdfPath);
File pdfFile = new File(pdfPath);
InputStream is = new FileInputStream(pdfFile);
showPdf(is, pdfPath, request, response);
} else {
//不用转换，直接预览
File pdfFile = new File(filePath);
InputStream is = new FileInputStream(pdfFile);
showPdf(is,filePath, request, response);
}
}catch (Exception e){
e.printStackTrace();
} finally {
//最后删除生成的pdf文件
FileUtils.deleteFile(pdfPath);
}
}
/**
* 文件预览
* @param is
* @param fileKey
* @param request
* @param response
* @throws IOException
*/
public void showPdf(InputStream is, String fileKey, HttpServletRequest request, HttpServletResponse response) throws IOException {
//根据文件名获取 MIME 类型
int idx = fileKey.lastIndexOf(".");
String suffix = fileKey.substring(idx);
String[] fileKeys = fileKey.split("/");
String fileName = fileKeys[fileKeys.length - 1];
String contentType = FileContentType.SUFFIX_TYPE.get(suffix);
//inline表示直接预览
String userAgent = request.getHeader("USER-AGENT");
String contentDisposition = "";
if(StringUtils.contains(userAgent, "MSIE")||StringUtils.contains(userAgent, "Trident") || StringUtils.contains(userAgent,"Edge")){
//IE 浏览器
contentDisposition = "inline;filename=" + URLEncoder.encode(fileName,"UTF8");
}else {
//其他浏览器
contentDisposition = "inline;filename=" + new String(fileName.getBytes("UTF-8"),"ISO8859-1");
}
// 设置头
response.setHeader("Content-Disposition",contentDisposition);
response.setContentType(contentType);
// 获取绑定了客户端的流
ServletOutputStream output = response.getOutputStream();
// 把输入流中的数据写入到输出流中
IOUtils.copy(is,output);
is.close();
}
}
4.前端代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>预览文件</title>
</head>
<body>
<button target="_blank" type="button"
onclick="showFile('d:/file/测试.doc')">预览doc </button>
<button target="_blank" type="button"
onclick="showFile('d:/file/测试.docx')">预览docx </button>
<button target="_blank" type="button"
onclick="showFile('d:/file/测试.xls')">预览xls </button>
<button target="_blank" type="button"
onclick="showFile('d:/file/测试.xlsx')">预览xlsx </button>
<button target="_blank" type="button"
onclick="showFile('d:/file/测试.pptx')">预览pptx </button>
<button target="_blank" type="button"
onclick="showFile('d:/file/数据库原理（第5版）（样章）.pdf')">预览pdf </button>
<script>
//预览
function showFile (filePath){
var url = "/showFile" + "?filePath=" + filePath;
window.open(url);
};
</script>
</body>
</html>
5.本人文件目录：
6.下载demo:
https://download.csdn.net/download/weixin_39220472/19418676
总结
