java 从resource下载excel打不开

莱茵战线2023-09-06 10:41

java 复制代码

    @GetMapping("/download/template")
    public void template(HttpServletResponse response) throws IOException {
        ServletOutputStream outputStream = response.getOutputStream();
        InputStream inputStream = null;
        try {
    //从resource获取excel文件流
            inputStream = getClass().getClassLoader().getResourceAsStream("批量上传产品模板.xlsx");
            String fileName = "批量上传产品模板.xlsx";
            response.reset();
            response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
            response.setCharacterEncoding("UTF-8");
            response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
            response.setHeader("Content-Length", String.valueOf(inputStream.available()));
            IoUtil.copy(inputStream, outputStream);
        } catch (Exception e) {
            e.printStackTrace();
            throw new ServiceException("下载失败");
        } finally {
            inputStream.close();
            outputStream.flush();
            outputStream.close();
        }
    }

由于Java项目在编译／Maven打包Excel等资源文件时，使用了Maven的filter，导致打包后的Excel文件乱码或者损坏。

需要再maven添加插件

XML 复制代码

<build>
   <plugins>
      <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-resources-plugin</artifactId>
         <configuration>
            <encoding>UTF-8</encoding>
            <nonFilteredFileExtensions>
               <nonFilteredFileExtension>xlsx</nonFilteredFileExtension>
               <nonFilteredFileExtension>xls</nonFilteredFileExtension>
            </nonFilteredFileExtensions>
         </configuration>
      </plugin>
   </plugins>
   <resources>
      <resource>
         <directory>src/main/resources</directory>
         <filtering>true</filtering>
      </resource>
   </resources>
</build>