【Java基础】Java压缩解压ZIP之Zip4j
Zip4j是一个Java操作zip压缩格式的开源项目,功能强大而且使用方便,能完全满足Java操作Zip压缩文件。默认采用UTF-8编码,所以支持中文,同时也支持密码,而且支持多种压缩算法。Zt-ZIP也不错，有兴趣的可以试试。
压缩
1、文件压缩
ZipFile zipFile = new ZipFile("c:\\ZipTest\\test1.zip");
ArrayList filesToAdd = new ArrayList();
filesToAdd.add(new File("c:\\ZipTest\\sample.txt"));
filesToAdd.add(new File("c:\\ZipTest\\文件.doc"));
filesToAdd.add(new File("c:\\ZipTest\\파일.xls"));
filesToAdd.add(new File("c:\\ZipTest\\ファイル.ppt"));
ZipParameters parameters = new ZipParameters();
parameters.setCompressionMethod(Zip4jConstants.COMP_DEFLATE);
parameters.setCompressionLevel(Zip4jConstants.DEFLATE_LEVEL_NORMAL);
zipFile.addFiles(filesToAdd, parameters);
2、设置密码
--标准
ZipFile zipFile = new ZipFile("c:\\ZipTest\\test2.zip");
ArrayList filesToAdd = new ArrayList();
filesToAdd.add(new File("c:\\ZipTest\\sample.txt"));
filesToAdd.add(new File("c:\\ZipTest\\文件.doc"));
filesToAdd.add(new File("c:\\ZipTest\\파일.xls"));
filesToAdd.add(new File("c:\\ZipTest\\ファイル.ppt"));
ZipParameters parameters = new ZipParameters();
parameters.setCompressionMethod(Zip4jConstants.COMP_DEFLATE);
parameters.setCompressionLevel(Zip4jConstants.DEFLATE_LEVEL_NORMAL);
// Set password
parameters.setEncryptFiles(true);
parameters.setEncryptionMethod(Zip4jConstants.ENC_METHOD_STANDARD);
parameters.setPassword("test123!");
zipFile.addFiles(filesToAdd, parameters);
--AES
ZipFile zipFile = new ZipFile("c:\\ZipTest\\test3.zip");
ArrayList filesToAdd = new ArrayList();
filesToAdd.add(new File("c:\\ZipTest\\sample.txt"));
filesToAdd.add(new File("c:\\ZipTest\\文件.doc"));
filesToAdd.add(new File("c:\\ZipTest\\파일.xls"));
filesToAdd.add(new File("c:\\ZipTest\\ファイル.ppt"));
ZipParameters parameters = new ZipParameters();
parameters.setCompressionMethod(Zip4jConstants.COMP_DEFLATE);
parameters.setCompressionLevel(Zip4jConstants.DEFLATE_LEVEL_NORMAL);
// Set password
parameters.setEncryptFiles(true);
parameters.setEncryptionMethod(Zip4jConstants.ENC_METHOD_AES);
parameters.setAesKeyStrength(Zip4jConstants.AES_STRENGTH_256);
parameters.setPassword("test123!");
zipFile.addFiles(filesToAdd, parameters);
3、文件夹压缩
ZipFile zipFile = new ZipFile("c:\\ZipTest\\test4.zip");
String folderToAdd = "c:\\ZipTest";
ZipParameters parameters = new ZipParameters();
parameters.setCompressionMethod(Zip4jConstants.COMP_DEFLATE);
parameters.setCompressionLevel(Zip4jConstants.DEFLATE_LEVEL_NORMAL);
zipFile.addFolder(folderToAdd, parameters);
4、将文件压缩到指定文件夹中
ZipFile zipFile = new ZipFile("c:\\ZipTest\\test5.zip");
ArrayList filesToAdd = new ArrayList();
filesToAdd.add(new File("c:\\ZipTest\\sample.txt"));
filesToAdd.add(new File("c:\\ZipTest\\文件.doc"));
filesToAdd.add(new File("c:\\ZipTest\\파일.xls"));
filesToAdd.add(new File("c:\\ZipTest\\ファイル.ppt"));
ZipParameters parameters = new ZipParameters();
parameters.setCompressionMethod(Zip4jConstants.COMP_DEFLATE);
parameters.setCompressionLevel(Zip4jConstants.DEFLATE_LEVEL_NORMAL);
parameters.setRootFolderInZip("test2/");
zipFile.addFiles(filesToAdd, parameters);
5、往ZIP中添加文件
ZipFile zipFile = new ZipFile("c:\\ZipTest\\test1.zip");
ZipParameters parameters = new ZipParameters();
parameters.setCompressionMethod(Zip4jConstants.COMP_DEFLATE);
parameters.setFileNameInZip("文件2.doc");
parameters.setSourceExternalStream(true);
InputStream is = new FileInputStream("c:\\ZipTest\\文件2.doc");
zipFile.addStream(is, parameters);
is.close();
6、分割压缩文件
ZipFile zipFile = new ZipFile("c:\\ZipTest\\test7.zip");
ArrayList filesToAdd = new ArrayList();
filesToAdd.add(new File("c:\\ZipTest\\sample.txt"));
filesToAdd.add(new File("c:\\ZipTest\\文件.doc"));
filesToAdd.add(new File("c:\\ZipTest\\파일.xls"));
filesToAdd.add(new File("c:\\ZipTest\\ファイル.ppt"));
ZipParameters parameters = new ZipParameters();
parameters.setCompressionMethod(Zip4jConstants.COMP_DEFLATE);
parameters.setCompressionLevel(Zip4jConstants.DEFLATE_LEVEL_NORMAL);
// SplitLenth has to be greater than 65536 bytes
// zipFile.createZipFileFromFolder()
zipFile.createZipFile(filesToAdd, parameters, true, 65536);
7、创建ZIP流
ArrayList filesToAdd = new ArrayList();
filesToAdd.add(new File("c:\\ZipTest\\sample.txt"));
filesToAdd.add(new File("c:\\ZipTest\\文件.doc"));
filesToAdd.add(new File("c:\\ZipTest\\파일.xls"));
filesToAdd.add(new File("c:\\ZipTest\\ファイル.ppt"));
ZipOutputStream outputStream = new ZipOutputStream(new FileOutputStream(new File("c:\\ZipTest\\test8.zip")));
ZipParameters parameters = new ZipParameters();
parameters.setCompressionMethod(Zip4jConstants.COMP_DEFLATE);
parameters.setCompressionLevel(Zip4jConstants.DEFLATE_LEVEL_NORMAL);
// Set password
parameters.setEncryptFiles(true);
parameters.setEncryptionMethod(Zip4jConstants.ENC_METHOD_AES);
parameters.setAesKeyStrength(Zip4jConstants.AES_STRENGTH_256);
parameters.setPassword("test123!");
for (int i = 0; i < filesToAdd.size(); i++) {
File file = (File)filesToAdd.get(i);
outputStream.putNextEntry(file,parameters);
if (file.isDirectory()) {
outputStream.closeEntry();
continue;
}
InputStream inputStream = new FileInputStream(file);
byte[] readBuff = new byte[4096];
int readLen = -1;
while ((readLen = inputStream.read(readBuff)) != -1) {
outputStream.write(readBuff, 0, readLen);
}
outputStream.closeEntry();
inputStream.close();
}
outputStream.finish();
outputStream.close();
8、从ZIP中删除文件
ZipFile zipFile = new ZipFile("c:\\ZipTest\\test1.zip");
//删除指定文件
zipFile.removeFile("sample.txt");
//删除第一个文件
if (zipFile.getFileHeaders() != null && zipFile.getFileHeaders().size() > 0) {
zipFile.removeFile((FileHeader)zipFile.getFileHeaders().get(0));
} else {
System.out.println("This cannot be demonstrated as zip file does not have any files left");
}
9、获取ZIP中文件一览
ZipFile zipFile = new ZipFile("c:\\ZipTest\\test5.zip");
List fileHeaderList = zipFile.getFileHeaders();
for (int i = 0; i < fileHeaderList.size(); i++) {
FileHeader fileHeader = (FileHeader)fileHeaderList.get(i);
System.out.println("****File Details for: " + fileHeader.getFileName() + "*****");
System.out.println("Name: " + fileHeader.getFileName());
System.out.println("Compressed Size: " + fileHeader.getCompressedSize());
System.out.println("Uncompressed Size: " + fileHeader.getUncompressedSize());
System.out.println("CRC: " + fileHeader.getCrc32());
System.out.println("************************************************************");
}
解压
1、解压所有文件
//方法一
ZipFile zipFile = new ZipFile("c:\\ZipTest\\test1.zip");
zipFile.extractAll("c:\\ZipTest1");
//方法二
ZipFile zipFile2 = new ZipFile("c:\\ZipTest\\test2.zip");
if (zipFile2.isEncrypted()) {
zipFile2.setPassword("test123!");
}
List fileHeaderList = zipFile2.getFileHeaders();
for (int i = 0; i < fileHeaderList.size(); i++) {
FileHeader fileHeader = (FileHeader)fileHeaderList.get(i);
zipFile2.extractFile(fileHeader, "c:\\ZipTest2\\");
}
2、解压所有文件到流
ZipFile zipFile = new ZipFile("c:\\ZipTest\\test2.zip");
if (zipFile.isEncrypted()) {
zipFile.setPassword("test123!");
}
List fileHeaderList = zipFile.getFileHeaders();
for (int i = 0; i < fileHeaderList.size(); i++) {
FileHeader fileHeader = (FileHeader)fileHeaderList.get(i);
if (fileHeader != null) {
String outFilePath = "c:\\ZipTest3\\" + System.getProperty("file.separator") + fileHeader.getFileName();
File outFile = new File(outFilePath);
if (fileHeader.isDirectory()) {
outFile.mkdirs();
continue;
}
File parentDir = outFile.getParentFile();
if (!parentDir.exists()) {
parentDir.mkdirs();
}
ZipInputStream is = zipFile.getInputStream(fileHeader);
OutputStream os = new FileOutputStream(outFile);
int readLen = -1;
byte[] buff = new byte[4096];
while ((readLen = is.read(buff)) != -1) {
os.write(buff, 0, readLen);
}
os.close();
os = null;
is.close();
is = null;
UnzipUtil.applyFileAttributes(fileHeader, outFile);
System.out.println("Done extracting: " + fileHeader.getFileName());
} else {
System.err.println("fileheader is null. Shouldn't be here");
}
}
3、解压单个文件
1. ZipFile zipFile = new ZipFile("c:\\ZipTest\\test2.zip");
2. if (zipFile.isEncrypted()) {
3. zipFile.setPassword("test123!");
4. }
6. zipFile.extractFile("文件.doc", "c:\\ZipTest4\\");
http://www.lingala.net/zip4j.html
https://github.com/srikanth-lingala/zip4j
https://github.com/zeroturnaround/zt-zip