/**
* 功能:压缩多个文件成一个zip文件
* @param srcfile:源文件列表
* @param zipfile:压缩后的文件
*/
public static void zipFiles(File[] srcfile, File zipfile) {
byte[] buf = new byte[1024];
try {
//ZipOutputStream类:完成文件或文件夹的压缩
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipfile));
for (int i = 0; i < srcfile.length; i++) {
FileInputStream in = new FileInputStream(srcfile[i]);
// 给列表中的文件单独命名
out.putNextEntry(new ZipEntry(srcfile[i].getName()));
int len;
while ((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
}
out.closeEntry();
in.close();
}
out.close();
System.out.println("压缩完成.");
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 功能:压缩多个文件,输出压缩后的zip文件流
* @param srcfile:源文件列表
* @param zipFileName:压缩后的文件名
* @return
*/
@GetMapping(value = "/downzip")
public ResponseEntity<byte[]> zipFiles(File[] srcfile, String zipFileName) {
byte[] buf = new byte[1024];
// 获取输出流
ByteArrayOutputStream bos = new ByteArrayOutputStream();
try {
// ZipOutputStream类:完成文件或文件夹的压缩
ZipOutputStream out = new ZipOutputStream(bos);
for (int i = 0; i < srcfile.length; i++) {
// 此处可用任意其他输入流将FileInputStream取代,outputStream为其他步骤的输出流
// ByteArrayInputStream in = new ByteArrayInputStream(outputStream.toByteArray());
FileInputStream in = new FileInputStream(srcfile[i]);
// 给列表中的文件单独命名
out.putNextEntry(new ZipEntry(srcfile[i].getName()));
int len;
while ((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
}
out.closeEntry();
in.close();
}
out.close();
bos.close();
System.out.println("压缩完成.");
} catch (Exception e) {
e.printStackTrace();
}
// 设置http响应头
HttpHeaders header = new HttpHeaders();
header.add("Content-Disposition", "attachment;filename=" + zipFileName + ".zip");
return new ResponseEntity<byte[]>(bos.toByteArray(), header, HttpStatus.CREATED);
}
/**
* 功能:压缩多个文件,输出压缩后的zip文件流
* @param srcfile:源文件列表
* @param zipFileName:压缩后的文件名
* @param response: Http响应
*/
@GetMapping(value = "/downzip")
public void zipFiles(File[] srcfile, String zipFileName, HttpServletResponse response) {
byte[] buf = new byte[1024];
// 获取输出流
BufferedOutputStream bos = null;
try {
bos = new BufferedOutputStream(response.getOutputStream());
} catch (IOException e) {
e.printStackTrace();
}
try {
response.reset(); // 重点突出
// 不同类型的文件对应不同的MIME类型
response.setContentType("application/x-msdownload");
response.setCharacterEncoding("utf-8");
response.setHeader("Content-disposition", "attachment;filename=" + zipFileName + ".zip");
// ZipOutputStream类:完成文件或文件夹的压缩
ZipOutputStream out = new ZipOutputStream(bos);
for (int i = 0; i < srcfile.length; i++) {
FileInputStream in = new FileInputStream(srcfile[i]);
// 给列表中的文件单独命名
out.putNextEntry(new ZipEntry(srcfile[i].getName()));
int len;
while ((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
}
out.closeEntry();
in.close();
}
out.close();
bos.close();
System.out.println("压缩完成.");
} catch (Exception e) {
e.printStackTrace();
}
}
以上两种方式,都是以输出文件流的形式,通过浏览器端进行下载,不同的是,第一种将流直接通过接口返回,第二种也是比较常见的一种,将文件流通过response进行输出,两种方式均可,这里留存记录下。
/**
* 功能:解压缩
* @param zipfile:需要解压缩的文件
* @param descDir:解压后的目标目录
*/
public static void unZipFiles(File zipfile, String descDir) {
try {
ZipFile zf = new ZipFile(zipfile);
for (Enumeration entries = zf.entries(); entries.hasMoreElements();) {
ZipEntry entry = (ZipEntry) entries.nextElement();
String zipEntryName = entry.getName();
InputStream in = zf.getInputStream(entry);
OutputStream out = new FileOutputStream(descDir + zipEntryName);
byte[] buf1 = new byte[1024];
int len;
while ((len = in.read(buf1)) > 0) {
out.write(buf1, 0, len);
}
in.close();
out.close();
System.out.println("解压缩完成.");
}
} catch (Exception e) {
e.printStackTrace();
}
}