JAVA利用Zip4j解压缩

官方地址：http://www.lingala.net/zip4j/（需要FQ）

jar包：http://pan.baidu.com/s/145hwI

演示包：http://pan.baidu.com/s/1vbFIB

一、压缩

1、标准压缩

ZipFile zipFile = new ZipFile("c:\\date.zip"); ArrayList filesToAdd = new ArrayList(); filesToAdd.add(new File(csvFilePath)); ZipParameters parameters = new ZipParameters(); parameters.setCompressionMethod(Zip4jConstants.COMP_DEFLATE); parameters.setCompressionLevel(Zip4jConstants.DEFLATE_LEVEL_NORMAL); 
//设置密码
parameters.setEncryptFiles(true);  
parameters.setEncryptionMethod(Zip4jConstants.ENC_METHOD_STANDARD);   
parameters.setPassword("123456");  
 zipFile.addFiles(filesToAdd, parameters);

2、AES加密

ZipFile zipFile = new ZipFile("c:\\ZipTest\\test3.zip"); ArrayList filesToAdd = new ArrayList(); filesToAdd.add(new File("c:\\ZipTest\\sample.txt")); ZipParameters parameters = new ZipParameters(); parameters.setCompressionMethod(Zip4jConstants.COMP_DEFLATE); parameters.setCompressionLevel(Zip4jConstants.DEFLATE_LEVEL_NORMAL); //设置密码 parameters.setEncryptFiles(true); parameters.setEncryptionMethod(Zip4jConstants.ENC_METHOD_AES); parameters.setAesKeyStrength(Zip4jConstants.AES_STRENGTH_256); parameters.setPassword("123456!"); 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")); ZipParameters parameters = new ZipParameters(); parameters.setCompressionMethod(Zip4jConstants.COMP_DEFLATE); parameters.setCompressionLevel(Zip4jConstants.DEFLATE_LEVEL_NORMAL); parameters.setRootFolderInZip("test2/"); zipFile.addFiles(filesToAdd, parameters);

5、向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、分隔压缩文件

ZipFile zipFile = new ZipFile("c:\\ZipTest\\test7.zip"); ArrayList filesToAdd = new ArrayList(); filesToAdd.add(new File("c:\\ZipTest\\sample.txt")); ZipParameters parameters = new ZipParameters(); parameters.setCompressionMethod(Zip4jConstants.COMP_DEFLATE); parameters.setCompressionLevel(Zip4jConstants.DEFLATE_LEVEL_NORMAL); zipFile.createZipFile(filesToAdd, parameters, true, 65536);

7、创建ZIP流

ArrayList filesToAdd = new ArrayList(); filesToAdd.add(new File("c:\\ZipTest\\sample.txt")); 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("************************************************************"); }

 

二、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

ZipFile zipFile = new ZipFile("c:\\ZipTest\\test2.zip"); if (zipFile.isEncrypted()) { zipFile.setPassword("test123!"); } zipFile.extractFile("文件.doc", "c:\\ZipTest4\\");

源文地址：http://rensanning.iteye.com/blog/1836727