springboot下载resources路径下的excel文件
Excel文件位置:
后台Controller代码如下:
import org.apache.commons.io.IOUtils; import org.jeecg.common.aspect.annotation.AutoLog; import org.springframework.core.io.ResourceLoader; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import javax.annotation.Resource; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServletResponse; import java.io.InputStream; import java.net.URLEncoder; import java.nio.charset.StandardCharsets; @RestController @RequestMapping("") public class DownloadExcelTemplateController { @Resource private ResourceLoader resourceLoader; /** * 下载模板 * * @param response */ @AutoLog(value = "下载导入模板") @RequestMapping(value = "/downloadTemp") public void downloadExcel(HttpServletResponse response) { InputStream inputStream = null; ServletOutputStream servletOutputStream = null; try { String filename = "导入模板.xls"; String path = "excel/bbb.xls"; org.springframework.core.io.Resource resource = resourceLoader.getResource("classpath:" + path); response.setContentType("application/vnd.ms-excel"); response.addHeader("Cache-Control", "no-cache, no-store, must-revalidate"); response.addHeader("charset", "utf-8"); response.addHeader("Pragma", "no-cache"); String encodeName = URLEncoder.encode(filename, StandardCharsets.UTF_8.toString()); response.setHeader("Content-Disposition", "attachment; filename=\"" + encodeName + "\"; filename*=utf-8''" + encodeName); inputStream = resource.getInputStream(); servletOutputStream = response.getOutputStream(); IOUtils.copy(inputStream, servletOutputStream); response.flushBuffer(); } catch (Exception e) { e.printStackTrace(); } finally { try { if (servletOutputStream != null) { servletOutputStream.close(); } if (inputStream != null) { inputStream.close(); } // jvm的垃圾回收 System.gc(); } catch (Exception e) { e.printStackTrace(); } } } }
如果下载的excel文件提示损坏无法打开,在pom.xml文件中添加避免压缩的插件
<build> <plugins> <!-- 避免excel文件压缩破坏 --> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-resources-plugin</artifactId> <version>3.2.0</version> <configuration> <encoding>UTF-8</encoding> <nonFilteredFileExtensions> <nonFilteredFileExtension>xls</nonFilteredFileExtension> </nonFilteredFileExtensions> </configuration> </plugin> </plugins> </build>
分类:
Springboot
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