1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

public class ZipFile {

public static void main(String[] args) throws IOException {

//输出压缩包

FileOutputStream fos = new FileOutputStream("src/main/resources/compressed.zip");

ZipOutputStream zipOut = new ZipOutputStream(fos);

//被压缩文件

File fileToZip = new File("src/main/resources/test1.txt");

FileInputStream fis = new FileInputStream(fileToZip);

//向压缩包中添加文件

ZipEntry zipEntry = new ZipEntry(fileToZip.getName());

zipOut.putNextEntry(zipEntry);

byte[] bytes = new byte[1024];

int length;

while((length = fis.read(bytes)) >= 0) {

zipOut.write(bytes, 0, length);

}

zipOut.close();

fis.close();

fos.close();

}

}

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

public class ZipMultipleFiles {

public static void main(String[] args) throws IOException {

List<String> srcFiles = Arrays.asList("src/main/resources/test1.txt", "src/main/resources/test2.txt");

FileOutputStream fos = new FileOutputStream("src/main/resources/multiCompressed.zip");

ZipOutputStream zipOut = new ZipOutputStream(fos);

//向压缩包中添加多个文件

for (String srcFile : srcFiles) {

File fileToZip = new File(srcFile);

FileInputStream fis = new FileInputStream(fileToZip);

ZipEntry zipEntry = new ZipEntry(fileToZip.getName());

zipOut.putNextEntry(zipEntry);

byte[] bytes = new byte[1024];

int length;

while((length = fis.read(bytes)) >= 0) {

zipOut.write(bytes, 0, length);

}

fis.close();

}

zipOut.close();

fos.close();

}

}

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

public class ZipDirectory {

public static void main(String[] args) throws IOException, FileNotFoundException {

//被压缩的文件夹

String sourceFile = "src/main/resources/zipTest";

//压缩结果输出，即压缩包

FileOutputStream fos = new FileOutputStream("src/main/resources/dirCompressed.zip");

ZipOutputStream zipOut = new ZipOutputStream(fos);

File fileToZip = new File(sourceFile);

//递归压缩文件夹

zipFile(fileToZip, fileToZip.getName(), zipOut);

//关闭输出流

zipOut.close();

fos.close();

}

/**

* 将fileToZip文件夹及其子目录文件递归压缩到zip文件中

* @param fileToZip 递归当前处理对象，可能是文件夹，也可能是文件

* @param fileName fileToZip文件或文件夹名称

* @param zipOut 压缩文件输出流

* @throws IOException

*/

private static void zipFile(File fileToZip, String fileName, ZipOutputStream zipOut) throws IOException {

//不压缩隐藏文件夹

if (fileToZip.isHidden()) {

return;

}

//判断压缩对象如果是一个文件夹

if (fileToZip.isDirectory()) {

if (fileName.endsWith("/")) {

//如果文件夹是以“/”结尾，将文件夹作为压缩箱放入zipOut压缩输出流

zipOut.putNextEntry(new ZipEntry(fileName));

zipOut.closeEntry();

} else {

//如果文件夹不是以“/”结尾，将文件夹结尾加上“/”之后作为压缩箱放入zipOut压缩输出流

zipOut.putNextEntry(new ZipEntry(fileName + "/"));

zipOut.closeEntry();

}

//遍历文件夹子目录，进行递归的zipFile

File[] children = fileToZip.listFiles();

for (File childFile : children) {

zipFile(childFile, fileName + "/" + childFile.getName(), zipOut);

}

//如果当前递归对象是文件夹，加入ZipEntry之后就返回

return;

}

//如果当前的fileToZip不是一个文件夹，是一个文件，将其以字节码形式压缩到压缩包里面

FileInputStream fis = new FileInputStream(fileToZip);

ZipEntry zipEntry = new ZipEntry(fileName);

zipOut.putNextEntry(zipEntry);

byte[] bytes = new byte[1024];

int length;

while ((length = fis.read(bytes)) >= 0) {

zipOut.write(bytes, 0, length);

}

fis.close();

}

}

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

public class UnzipFile {

public static void main(String[] args) throws IOException {

//被解压的压缩文件

String fileZip = "src/main/resources/unzipTest/compressed.zip";

//解压的目标目录

File destDir = new File("src/main/resources/unzipTest");

byte[] buffer = new byte[1024];

ZipInputStream zis = new ZipInputStream(new FileInputStream(fileZip));

//获取压缩包中的entry，并将其解压

ZipEntry zipEntry = zis.getNextEntry();

while (zipEntry != null) {

File newFile = newFile(destDir, zipEntry);

FileOutputStream fos = new FileOutputStream(newFile);

int len;

while ((len = zis.read(buffer)) > 0) {

fos.write(buffer, 0, len);

}

fos.close();

//解压完成一个entry，再解压下一个

zipEntry = zis.getNextEntry();

}

zis.closeEntry();

zis.close();

}

//在解压目标文件夹，新建一个文件

public static File newFile(File destinationDir, ZipEntry zipEntry) throws IOException {

File destFile = new File(destinationDir, zipEntry.getName());

String destDirPath = destinationDir.getCanonicalPath();

String destFilePath = destFile.getCanonicalPath();

if (!destFilePath.startsWith(destDirPath + File.separator)) {

throw new IOException("该解压项在目标文件夹之外: " + zipEntry.getName());

}

return destFile;

}

}