java项目中的文档转换案例实战——Word转换为PDF

Posted 2022-01-26 北溟溟

前言

由于在开发中需要适配不同的多端应用，在文件相关处理中也会存在相同的问题，需要将文档转换为不同的格式展示，本节我们主要通过一个小案例实现在java环境下实现Word2003(doc)、 Word2007(docx)转换为PDF用于在线展示。

正文

• 引入word转换为pdf的pom工具包

<!-- docx/doc转换pdf-->
<dependency>
	<groupId>com.documents4j</groupId>
	<artifactId>documents4j-local</artifactId>
	<version>1.1.5</version>
</dependency>
<dependency>
	<groupId>com.documents4j</groupId>
	<artifactId>documents4j-transformer-msoffice-word</artifactId>
	<version>1.1.5</version>
</dependency>

• 后端转换代码

    @ApiOperation(value = "word转换为pdf")
    @PostMapping(value = "wordToPdf")
    public void wordToPdf(HttpServletResponse response, @RequestPart("file") MultipartFile file) 
        try 
            String ext = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".")+1);
            response.reset();
            response.setHeader("Content-Disposition", "inline; filename=" + URLEncoder.encode(IdWorker.getIdStr() + ".pdf", "UTF-8"));
            ServletOutputStream outputStream = response.getOutputStream();
            InputStream inputStream = file.getInputStream();
            IConverter converter = LocalConverter.builder().build();
            if(ext.equals("docx"))
                converter.convert(inputStream).as(DocumentType.DOCX).to(outputStream).as(DocumentType.PDF).execute();
            
            if(ext.equals("doc"))
                converter.convert(inputStream).as(DocumentType.DOC).to(outputStream).as(DocumentType.PDF).execute();
            
            inputStream.close();
            outputStream.close();
         catch (IOException ioException) 
            ioException.printStackTrace();
        
    

• vue前端代码

<template>
  <div class="container">
    <div class="title">
      <span>Word转换PDF示例</span>
      <el-divider direction="vertical"></el-divider>
      <router-link to="home">
        <span style="font-size: 18px;">退出</span>
      </router-link>
    </div>
    <el-divider>Test Staring</el-divider>
    <div style="text-align: center;">
      <el-upload
          ref="upload"
          class="upload-demo"
          drag
          :http-request="myUploadFile">
        <i class="el-icon-upload"></i>
        <div class="el-upload__text">将文件拖到此处，或<em>点击上传</em></div>
        <div class="el-upload__tip" slot="tip">只能上传docx文件，且不超过50MB</div>
      </el-upload>
    </div>
  </div>
</template>

<script>
export default 
  name: "WordToPdf",
  data() 
    return 
  ,
  methods: 
    //文件上传成功的回调
    myUploadFile(data) 
      const formData = new FormData();
      formData.append("file", data.file);
      this.$http.post('/fileTransfer/wordToPdf', formData, 
        responseType: 'blob',
        headers: 
          'Content-Type': 'multipart/form-data',
        ,
      ).then(res => 
        const blob = new Blob([res.data], type: 'application/pdf');
        let timestamp = (new Date()).valueOf();
        const fileName = timestamp + '.pdf'
        if ('download' in document.createElement('a'))  // 非IE下载
          const elink = document.createElement('a')
          elink.download = fileName
          elink.style.display = 'none'
          elink.href = window.URL.createObjectURL(blob)
          document.body.appendChild(elink)
          elink.click()
          window.URL.revokeObjectURL(elink.href) // 释放URL 对象
          document.body.removeChild(elink)
         else  // IE10+下载
          navigator.msSaveBlob(blob, fileName)
        
      ).catch(error => 
        this.$message.error(error);
      );
    
  

</script>

<style scoped lang="scss">
.container 
  padding: 10px;

  .title 
    font-size: 20px;
    font-weight: bold;
  

</style>

• 验证结果

 

结语

ok，本节内容到这里就结束了，我们下期见。。。。。。