JAVA利用Zip4j解压缩【转】

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

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JAVA利用Zip4j解压缩【转】

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