JAVA利用Zip4j解压缩【转】

来源：互联网发布：python ggplot 保存编辑：程序博客网时间：2024/06/05 16:06

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 passwordparameters.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

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