java 将多张图片文件压缩zip下载

1、controller　　前端把图片文件的id用逗号隔开拼起来传给后端。

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/**  * 下载选中资源  *  * @param response  * @return: void  */ @GetMapping("downloadDataZip") public void downloadDataZip(String signs, HttpServletResponse response) {     String[] strSigns = signs.split(",");     List<Long> ids = new ArrayList<>();     for(String sign : strSigns){         Long tmpId = Security.decodeSignQuiet(sign);         ids.add(tmpId);     }       List<StoreImgModel> modelList = storeImgService.listByIds(ids);     Map<String, String> srcFiles = new HashMap<>();     for(StoreImgModel imgModel : modelList){         srcFiles.put(imgModel.getName(), imgModel.getImgUrl());     }       String title ="下载选中图片.zip";     File filePath = new File(FileUtil.getTemplatePath() + File.separator + title);     FileUtil.zipFiles(srcFiles, filePath);     String filename = System.currentTimeMillis()+"_"+title;     //设置文件路径     if (filePath.exists()) {         FileInputStream fis = null;         BufferedInputStream bis = null;         try {             response.setContentType("application/octet-stream");             response.setHeader("Content-disposition", "attachment; filename=" + new String(filename.getBytes("utf-8"), "ISO8859-1"));             byte[] buffer = new byte[4096];             fis = new FileInputStream(filePath);             bis = new BufferedInputStream(fis);             OutputStream os = response.getOutputStream();             int i = bis.read(buffer);             while (i != -1) {                 os.write(buffer, 0, i);                 i = bis.read(buffer);             }         } catch (Exception e) {             e.printStackTrace();         } finally {             if (bis != null) {                 try {                     bis.close();                     // 删除临时文件                     filePath.delete();                 } catch (IOException e) {                     e.printStackTrace();                 }             }             if (fis != null) {                 try {                     fis.close();                 } catch (IOException e) {                     e.printStackTrace();                 }             }         }     } }

　　2、创建一个文件处理工具类  FileUtil.java 

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package common.util;     import java.io.BufferedInputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.net.URL; import java.util.Map; import java.util.zip.ZipEntry; import java.util.zip.ZipOutputStream;   public class FileUtil {       /**      * 多图片压缩zip      *      * @param srcFiles 图片名称      * @param zipFile  文件路径      */     public static void zipFiles(Map<String, String> srcFiles, File zipFile) {           // 判断压缩后的文件存在不，不存在则创建         if (!zipFile.exists()) {             try {                 zipFile.createNewFile();             } catch (IOException e) {                 e.printStackTrace();             }         }         // 创建 FileOutputStream 对象         FileOutputStream fileOutputStream ;         // 创建 ZipOutputStream         ZipOutputStream zipOutputStream ;         // 创建 FileInputStream 对象         BufferedInputStream bis = null;           InputStream inputStream = null;           try {             // 实例化 FileOutputStream 对象             fileOutputStream = new FileOutputStream(zipFile);             // 实例化 ZipOutputStream 对象             zipOutputStream = new ZipOutputStream(fileOutputStream);             // 创建 ZipEntry 对象             ZipEntry zipEntry ;             // 遍历源文件数组             for (String file : srcFiles.keySet()) {                 // 将源文件数组中的当前文件读入 FileInputStream 流中                 String fileName = file;                 URL url = new URL(srcFiles.get(file));                 inputStream = url.openStream();                 // 文件后缀名称                 // 实例化 ZipEntry 对象，源文件数组中的当前文件                 zipEntry = new ZipEntry(fileName);                 zipOutputStream.putNextEntry(zipEntry);                 // 该变量记录每次真正读的字节个数                 int len;                 // 定义每次读取的字节数组                 byte[] buffer = new byte[4096];                 while ((len = inputStream.read(buffer)) > 0) {                     zipOutputStream.write(buffer, 0, len);                 }               }             zipOutputStream.closeEntry();             zipOutputStream.close();               fileOutputStream.close();         } catch (IOException e) {             e.printStackTrace();         } finally {             try {                 if (bis != null) {                     bis.close();                 }                 if (inputStream != null) {                     inputStream.close();                 }             } catch (IOException e) {                 e.printStackTrace();             }         }     }       /**      * 获取类路径      * return 绝对路径地址      */     public static String getTemplatePath() {         String realPath = FileUtil.class.getClassLoader().getResource("").getFile();         File file = new File(realPath);         realPath = file.getAbsolutePath();         try {             realPath = java.net.URLDecoder.decode(realPath, "utf-8");         } catch (Exception e) {             e.printStackTrace();         }         return realPath;     }   }

　　3、前端请求，直接用window.location.href

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batchDownload: function (){                 let data = table.checkStatus('ImgTableId').data;                 let signs = "";                 data.forEach((item, index)=>{                     signs += item.sign + ",";                 });                 if (signs && signs.endsWith(",")){                     signs = signs.substr(0, signs.length -1);                 }                 window.location.href = "${serverBaseUrl}/downloadDataZip?signs="+signs;             }

　　

参考：https://blog.csdn.net/zouliping123456/article/details/115211866