springboot利用aspose预览office文件的实现过程

2024-04-02 19:04:59 695人浏览薄情痞子

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摘要

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pd

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;
 
    
    @GetMapping("/index")
    public String index(){
        return "index";
    }
 
    
    @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);
        }
 
    }
 
    
    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：