controller層:
/** * 打包壓縮下載文件 */ @RequestMapping(value = "/downLoadZipFile") public void downLoadZipFile(HttpServletResponse response) throws IOException{ String zipName = "myfile.zip"; List<FileBean> fileList = fileService.getFileList();//查詢數據庫中記錄 response.setContentType("APPLICATION/OCTET-STREAM"); response.setHeader("Content-Disposition","attachment; filename="+zipName); ZipOutputStream out = new ZipOutputStream(response.getOutputStream()); try { for(Iterator<FileBean> it = fileList.iterator();it.hasNext();){ FileBean file = it.next(); ZipUtils.doCompress(file.getFilePath()+file.getFileName(), out); response.flushBuffer(); } } catch (Exception e) { e.printStackTrace(); }finally{ out.close(); } }
如果需要支持跨域,在controller中添加代碼:
response.setHeader("Access-Control-Allow-Origin", "*");
response.setHeader("Access-Control-Allow-Method", "POST,GET");
壓縮工具類:
package com.m2plat.puhui.utils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.*; import java.util.zip.ZipEntry; import java.util.zip.ZipOutputStream; /** * 文件壓縮工具類 * Created by xiangzh on 2018/11/20. */ public class ZipUtils { private static Logger logger = LoggerFactory.getLogger(ZipUtils.class); private ZipUtils(){ } public static void doCompress(String srcFile, String zipFile) throws IOException { doCompress(new File(srcFile), new File(zipFile)); } /** * 文件壓縮 * @param srcFile 目錄或者單個文件 * @param zipFile 壓縮后的ZIP文件 */ public static void doCompress(File srcFile, File zipFile) throws IOException { ZipOutputStream out = null; try { out = new ZipOutputStream(new FileOutputStream(zipFile)); doCompress(srcFile, out); } catch (Exception e) { throw e; } finally { out.close();//記得關閉資源 } } public static void doCompress(String filelName, ZipOutputStream out) throws IOException{ doCompress(new File(filelName), out); } public static void doCompress(File file, ZipOutputStream out) throws IOException{ doCompress(file, out, ""); } public static void doCompress(File inFile, ZipOutputStream out, String dir) throws IOException { if ( inFile.isDirectory() ) { File[] files = inFile.listFiles(); if (files!=null && files.length>0) { for (File file : files) { String name = inFile.getName(); if (!"".equals(dir)) { name = dir + "/" + name; } ZipUtils.doCompress(file, out, name); } } } else { ZipUtils.doZip(inFile, out, dir); } } public static void doZip(File inFile, ZipOutputStream out, String dir) throws IOException { String entryName = null; if (!"".equals(dir)) { entryName = dir + "/" + inFile.getName(); } else { entryName = inFile.getName(); } ZipEntry entry = new ZipEntry(entryName); out.putNextEntry(entry); int len = 0 ; byte[] buffer = new byte[1024]; FileInputStream fis = new FileInputStream(inFile); while ((len = fis.read(buffer)) > 0) { out.write(buffer, 0, len); out.flush(); } out.closeEntry(); fis.close(); } public static void doZip(InputStream in ,ZipOutputStream out, String entryName) throws IOException { logger.info("---添加InputStream到壓縮文件,InputStream大小:{}",in.available()); ZipEntry entry = new ZipEntry(entryName); out.putNextEntry(entry); int len = 0 ; byte[] buffer = new byte[1024*5]; while ((len = in.read(buffer)) > 0) { out.write(buffer, 0, len); out.flush(); } out.closeEntry(); in.close(); } public static void main(String[] args) throws IOException { doCompress("D:/excel/puhui/1", "D:/附件.zip"); } }
其他:spring mvc 下載普通單個文件的方法:
@RequestMapping(value = "/downloadFile") @ResponseBody public void downloadFile (HttpServletResponse response) { OutputStream os = null; try { os = response.getOutputStream(); File file = new File("D:/javaweb/demo.txt"); // Spring工具獲取項目resources里的文件 File file2 = ResourceUtils.getFile("classpath:shell/init.sh"); if(!file.exists()){ return; } response.reset(); response.setHeader("Content-Disposition", "attachment;filename=demo.txt"); response.setContentType("application/octet-stream; charset=utf-8"); os.write(FileUtils.readFileToByteArray(file)); } catch (Exception e) { e.printStackTrace(); }finally{ IOUtils.closeQuietly(os); } }
補充,另外一種 利用 ResponseEntity<byte[]> 實現下載單個文件的方法:
/** * Spring下載文件 * @param request * @throws IOException */ @RequestMapping(value="/download") public ResponseEntity<byte[]> download(HttpServletRequest request) throws IOException{ // 獲取項目webapp目錄路徑下的文件 String path = request.getSession().getServletContext().getRealPath("/"); File file = new File(path+"/soft/javaweb.txt"); HttpHeaders headers = new HttpHeaders(); headers.setContentType(MediaType.APPLICATION_OCTET_STREAM); headers.setContentDispositionFormData("attachment", "javaweb.txt"); return new ResponseEntity<byte[]>(org.apache.commons.io.FileUtils.readFileToByteArray(file),headers, HttpStatus.CREATED); } <a target="_blank" href="/download">點擊下載</a>
參考: