java 对多文件进行压缩与解压缩代码

    技术2022-05-19  27

    在使用此段代码前首先必须去网上下载 ant.jar的最新的jar包

    import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.util.Enumeration;import java.util.zip.CRC32;import java.util.zip.CheckedInputStream;import java.util.zip.CheckedOutputStream;import java.util.zip.Deflater;import java.util.zip.ZipException;import java.util.zip.ZipInputStream;import org.apache.tools.zip.ZipEntry;import org.apache.tools.zip.ZipFile;import org.apache.tools.zip.ZipOutputStream;

    /** *  * 提供对多个文件与目录的压缩,并支持是否需要创建压缩源目录、中文路径 *  * @author zhouxin */public class ZipJava{    private static boolean isCreateSrcDir = true;//是否创建源目录

        /**     *      * [一句话功能简述]<BR>     * [功能详细描述]     *      * @param args     * @throws IOException     */    public static void main(String[] args) throws IOException    {        String src = "e:/新建文本文档.txt";//指定压缩源,可以是目录或文件        String src1 = "e:/新建文本文档1.txt";//指定压缩源,可以是目录或文件        String src2 = "d:/周通知书.doc";        String decompressDir = "e:/tmp/decompress";//解压路径        String archive = "e:/tmp/test.zip";//压缩包路径        String comment = "Java Zip 测试.";//压缩包注释        String[] arraySrcStrings = new String[] {src, src1, src2 };        //----压缩文件或目录        writeByApacheZipOutputStream(arraySrcStrings, archive, comment);        /*         * 读压缩文件,注释掉,因为使用的是apache的压缩类,所以使用java类库中 解压类时出错,这里不能运行         */        //readByZipInputStream();        //----使用apace ZipFile读取压缩文件        readByApacheZipFile(archive, decompressDir);    }

        /**     *      * [对指定路径下文件的压缩处理]<BR>     * [功能详细描述]     *      * @param src 径地址     * @param archive 指定到压缩文件夹的路径     * @param comment 描述     * @throws FileNotFoundException 文件没有找到异常     * @throws IOException IO输入异常     */    public static void writeByApacheZipOutputStream(String[] src,        String archive, String comment) throws FileNotFoundException,        IOException    {        //----压缩文件:        FileOutputStream f = new FileOutputStream(archive);        //使用指定校验和创建输出流        CheckedOutputStream csum = new CheckedOutputStream(f, new CRC32());        ZipOutputStream zos = new ZipOutputStream(csum);        //支持中文        zos.setEncoding("GBK");        BufferedOutputStream out = new BufferedOutputStream(zos);        //设置压缩包注释        zos.setComment(comment);        //启用压缩        zos.setMethod(ZipOutputStream.DEFLATED);        //压缩级别为最强压缩,但时间要花得多一点        zos.setLevel(Deflater.BEST_COMPRESSION);        // 如果为单个文件的压缩在这里修改        for (int i = 0; i < src.length; i++)        {            File srcFile = new File(src[i]);            if (!srcFile.exists()                || (srcFile.isDirectory() && srcFile.list().length == 0))            {                throw new FileNotFoundException(                    "File must exist and ZIP file must have at least one entry.");            }            String strSrcString = src[i];            //获取压缩源所在父目录            strSrcString = strSrcString.replaceAll("", "/");            String prefixDir = null;            if (srcFile.isFile())            {                prefixDir = strSrcString.substring(0, strSrcString                    .lastIndexOf("/") + 1);            }            else            {                prefixDir = (strSrcString.replaceAll("/$", "") + "/");            }            //如果不是根目录            if (prefixDir.indexOf("/") != (prefixDir.length() - 1)                && isCreateSrcDir)            {                prefixDir = prefixDir.replaceAll("[^/]+/$", "");            }            //开始压缩            writeRecursive(zos, out, srcFile, prefixDir);        }

            out.close();        // 注:校验和要在流关闭后才准备,一定要放在流被关闭后使用        System.out.println("Checksum: " + csum.getChecksum().getValue());        BufferedInputStream bi;    }

        /**     *      * [* 使用 org.apache.tools.zip.ZipFile 解压文件,它与 java 类库中的     * java.util.zip.ZipFile 使用方式是一新的,只不过多了设置编码方式的 接口。     *      * 注,apache 没有提供 ZipInputStream 类,所以只能使用它提供的ZipFile 来读取压缩文件。]<BR>     *      * @param archive 压缩包路径     * @param decompressDir 解压路径     * @throws IOException     * @throws FileNotFoundException     * @throws ZipException     */

        public static void readByApacheZipFile(String archive, String decompressDir)        throws IOException, FileNotFoundException, ZipException    {        BufferedInputStream bi;        ZipFile zf = new ZipFile(archive, "GBK");//支持中文        Enumeration e = zf.getEntries();        while (e.hasMoreElements())        {            ZipEntry ze2 = (ZipEntry) e.nextElement();            String entryName = ze2.getName();            String path = decompressDir + "/" + entryName;            if (ze2.isDirectory())            {                System.out.println("正在创建解压目录 - " + entryName);                File decompressDirFile = new File(path);                if (!decompressDirFile.exists())                {                    decompressDirFile.mkdirs();                }            }            else            {                System.out.println("正在创建解压文件 - " + entryName);                String fileDir = path.substring(0, path.lastIndexOf("/"));                File fileDirFile = new File(fileDir);                if (!fileDirFile.exists())                {                    fileDirFile.mkdirs();                }                BufferedOutputStream bos = new BufferedOutputStream(                    new FileOutputStream(decompressDir + "/" + entryName));                bi = new BufferedInputStream(zf.getInputStream(ze2));                byte[] readContent = new byte[1024];                int readCount = bi.read(readContent);                while (readCount != -1)                {                    bos.write(readContent, 0, readCount);                    readCount = bi.read(readContent);                }                bos.close();            }        }        zf.close();    }

        /**     *      * [使用 java api 中的 ZipInputStream 类解压文件,但如果压缩时采用了     * org.apache.tools.zip.ZipOutputStream时,而不是 java 类库中的     * java.util.zip.ZipOutputStream时,该方法不能使用,原因就是编码方 式不一致导致,运行时会抛如下异常:     * java.lang.IllegalArgumentException at     * java.util.zip.ZipInputStream.getUTF8String(ZipInputStream.java:290)     *      * 当然,如果压缩包使用的是java类库的java.util.zip.ZipOutputStream 压缩而成是不会有问题的,但它不支持中文 ]<BR>     * [功能详细描述]     *      * @param archive 压缩包路径     * @param decompressDir 解压路径     * @throws FileNotFoundException     * @throws IOException     */    public static void readByZipInputStream(String archive, String decompressDir)        throws FileNotFoundException, IOException    {        BufferedInputStream bi;        //----解压文件(ZIP文件的解压缩实质上就是从输入流中读取数据):        System.out.println("开始读压缩文件");        FileInputStream fi = new FileInputStream(archive);        CheckedInputStream csumi = new CheckedInputStream(fi, new CRC32());        ZipInputStream in2 = new ZipInputStream(csumi);        bi = new BufferedInputStream(in2);        java.util.zip.ZipEntry ze;//压缩文件条目        //遍历压缩包中的文件条目        while ((ze = in2.getNextEntry()) != null)        {            String entryName = ze.getName();            if (ze.isDirectory())            {                System.out.println("正在创建解压目录 - " + entryName);                File decompressDirFile = new File(decompressDir + "/"                    + entryName);                if (!decompressDirFile.exists())                {                    decompressDirFile.mkdirs();                }            }            else            {                System.out.println("正在创建解压文件 - " + entryName);                BufferedOutputStream bos = new BufferedOutputStream(                    new FileOutputStream(decompressDir                        + "/"                        + entryName.substring(entryName.lastIndexOf("//"),                            entryName.length()                                - (entryName.lastIndexOf("//") - 2))));                byte[] buffer = new byte[1024];                int readCount = bi.read(buffer);                while (readCount != -1)                {                    bos.write(buffer, 0, readCount);                    readCount = bi.read(buffer);                }                bos.close();            }        }        bi.close();        System.out.println("Checksum: " + csumi.getChecksum().getValue());    }

        /**     *      * [递归压缩     *      * 使用 org.apache.tools.zip.ZipOutputStream 类进行压缩,它的好处就是支持中文路径, 而Java类库中的     * java.util.zip.ZipOutputStream 压缩中文文件名时压缩包会出现乱码。 使用 apache 中的这个类与 java     * 类库中的用法是一新的,只是能设置编码方式了。]<BR>     * [功能详细描述]     *      * @param zos     * @param bo     * @param srcFile     * @param prefixDir     * @throws IOException     * @throws FileNotFoundException     */    private static void writeRecursive(ZipOutputStream zos,        BufferedOutputStream bo, File srcFile, String prefixDir)        throws IOException, FileNotFoundException    {        ZipEntry zipEntry;        String filePath = srcFile.getAbsolutePath().replaceAll("", "/")            .replaceAll("//", "/");        if (srcFile.isDirectory())        {            filePath = filePath.replaceAll("/$", "") + "/";        }        String entryName = filePath.replace(prefixDir, "").replaceAll("/$", "");        if (srcFile.isDirectory())        {            if (!"".equals(entryName))            {                System.out.println("正在创建目录 - " + srcFile.getAbsolutePath()                    + " entryName=" + entryName);                //如果是目录,则需要在写目录后面加上 /                zipEntry = new ZipEntry(entryName + "/");                zos.putNextEntry(zipEntry);            }            File srcFiles[] = srcFile.listFiles();            for (int i = 0; i < srcFiles.length; i++)            {                writeRecursive(zos, bo, srcFiles[i], prefixDir);            }        }        else        {            System.out.println("正在写文件 - " + srcFile.getAbsolutePath()                + " entryName=" + entryName);            BufferedInputStream bi = new BufferedInputStream(                new FileInputStream(srcFile));            //开始写入新的ZIP文件条目并将流定位到条目数据的开始处            zipEntry = new ZipEntry(entryName);            zos.putNextEntry(zipEntry);            byte[] buffer = new byte[1024];            int readCount = bi.read(buffer);            while (readCount != -1)            {                bo.write(buffer, 0, readCount);                readCount = bi.read(buffer);            }            //注,在使用缓冲流写压缩文件时,一个条件完后一定要刷新一把,不            //然可能有的内容就会存入到后面条目中去了            bo.flush();            //文件读完后关闭            bi.close();        }    }}


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