1、controller层
/**
* 压缩打包文件下载到浏览器默认路径
* @return
*/
@RequestMapping(value="/downloadZipFile")
@ResponseBody
public Object compressedFile(@RequestParam(value = "docIds",required = false)String docIds){
List<File> files=new ArrayList<>();
List<String> list=new ArrayList<>();
String[] idList =docIds.split(",");
for (String id:idList){
list.add(id);
}
List<DocManager> atttendanchList = docManagerService.selByAttendanceId(list);
for (DocManager docManager:atttendanchList){
File file = new File(docManager.getDocPath()+docManager.getFileName());
files.add(file);
}
//将多个文件压缩打包，下载到默认浏览器
try {
File zipFile=FileUtil.fileToZip(files,zipFilePath,ContentUtil.randomGen(6));//将多文件打包为zip文件
FileSystemResource fileSource = new FileSystemResource(zipFile);
Object o = FileUtil.downloadFile(fileSource.getInputStream(), fileSource.getFilename());
zipFile.delete();//删除暂时存储的zip压缩包
return o;
} catch (IOException e) {
return MarkUtil.markRetunMsg(false,e.getMessage());
}
}
2、FileUtil类中fileToZip方法，如下：
/**
* 压缩文件
* @param files
* @param zipFilePath
* @param fileName
* @return
*/
public static File fileToZip(List<File> files, String zipFilePath, String fileName) {
File zipFile = new File(zipFilePath + "/" + fileName + ".zip");
new File(zipFilePath).mkdirs();
FileInputStream fis = null;
BufferedInputStream bis = null;
FileOutputStream fos = null;
ZipOutputStream zos = null;
try {
fos = new FileOutputStream(zipFile);
zos = new ZipOutputStream(new BufferedOutputStream(fos));
byte[] bufs = new byte[1024 * 10];
for (File file : files) {
//创建ZIP实体，并添加进压缩包
String name=file.getName();
String reName=name.substring(0,name.length()-6);//修改文件名称，再保存到zip文件中
ZipEntry zipEntry = new ZipEntry(reName);//压缩
zos.putNextEntry(zipEntry);//将每个压缩文件保存到zip文件中
//读取待压缩的文件并写进压缩包里
fis = new FileInputStream(file);
bis = new BufferedInputStream(fis, 1024 * 10);
int read = 0;
while ((read = bis.read(bufs, 0, 1024 * 10)) != -1) {
zos.write(bufs, 0, read);
}
}
} catch (FileNotFoundException e) {
e.printStackTrace();
throw new RuntimeException(e);
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException(e);
} finally {
//关闭流
try {
if (null != bis) bis.close();
if (null != zos) zos.close();
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException(e);
}
}
return zipFile;
}
3、FileUtil类中downloadFile方法，如下：
/**
* 下载文件到默认浏览器
* @param in
* @param fileName
* @return
*/
public static ResponseEntity<InputStreamResource> downloadFile(InputStream in,String fileName) {
try {
byte[] testBytes = new byte[in.available()];
HttpHeaders headers = new HttpHeaders();
headers.add("Cache-Control", "no-cache, no-store, must-revalidate");
headers.add("Content-Disposition", String.format("attachment; filename=\"%s\"", MarkUtil.convertFileName(fileName)));
headers.add("Pragma", "no-cache");
headers.add("Expires", "0");
return ResponseEntity
.ok()
.headers(headers)
.contentLength(testBytes.length)
.contentType(MediaType.parseMediaType("application/octet-stream"))
.body(new InputStreamResource(in));
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
4、MarkUtil类中的convertFileName方法如下：
/**
* chinese code convert
* @param fileName
* @return
*/
public static String convertFileName(String fileName) {
if(isContainChinese(fileName)) {
try {
fileName = URLEncoder.encode(fileName, "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
return fileName;
}
欢迎转载，但是要注释来源，谢谢
作者：mengmeng233 来源： 原文：https://blog.csdn.net/mengmeng2222222/article/details/90484775 版权声明：本文为博主原创文章，转载请附上博文链接！
