用JAVA代码怎么实现指定的文件夹打包成自释放格式的.ZIP格式

Question

用JAVA代码怎么实现指定的文件夹打包成自释放格式的.ZIP格式

Answer 1

楼主可以用java.util.zip 包来实现，网上也有大把的代码可以参考。

Answer 2

java.util.zip  很多，很简单的。

Answer 3

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;
import org.apache.tools.zip.ZipOutputStream;/** 
 * 
 * 类说明:压缩、解压文件公用类
 *
 */
public class Decompression {
    private static final int BUFFEREDSIZE = 1024;
    public Decompression() {
        // TODO Auto-generated constructor stub
    }    /**
     * 解压zip格式的压缩文件到当前文件夹
     * @param zipFileName
     * @throws Exception
     */
    @SuppressWarnings("unchecked")
    public synchronized void unzipFile(String zipFileName) throws Exception {
        try {
            File f = new File(zipFileName);
            ZipFile zipFile = new ZipFile(zipFileName);
            if((!f.exists()) && (f.length() <= 0)) {
                throw new Exception("要解压的文件不存在!");
            }
            String strPath, gbkPath, strtemp;
            File tempFile = new File(f.getParent());
            strPath = tempFile.getAbsolutePath();
            java.util.Enumeration e = zipFile.getEntries();
            while(e.hasMoreElements()){
                org.apache.tools.zip.ZipEntry zipEnt = (ZipEntry) e.nextElement();
                gbkPath=zipEnt.getName();
                if(zipEnt.isDirectory()){
                    strtemp = strPath + "/" + gbkPath;
                    File dir = new File(strtemp);
                    dir.mkdirs();
                    continue;
                } else {
                    //读写文件
                    InputStream is = zipFile.getInputStream(zipEnt);
                    BufferedInputStream bis = new BufferedInputStream(is);
                    gbkPath=zipEnt.getName();
                    strtemp = strPath + "/" + gbkPath;
                
                    //建目录
                    String strsubdir = gbkPath;
                    for(int i = 0; i < strsubdir.length(); i++) {
                        if(strsubdir.substring(i, i + 1).equalsIgnoreCase("/")) {
                            String temp = strPath + "/" + strsubdir.substring(0, i);
                            File subdir = new File(temp);
                            if(!subdir.exists())
                            subdir.mkdir();
                        }
                    }
                    FileOutputStream fos = new FileOutputStream(strtemp);
                    BufferedOutputStream bos = new BufferedOutputStream(fos);
                    int c;
                    while((c = bis.read()) != -1) {
                        bos.write((byte) c);
                    }
                    bos.close();
                    fos.close();
                }
            }
        } catch(Exception e) {
            e.printStackTrace();
            throw e;
        }
    }
    
    /**
     * 解压zip格式的压缩文件到指定位置
     * @param zipFileName 压缩文件
     * @param extPlace 解压目录
     * @throws Exception
     */
    @SuppressWarnings("unchecked")
    public synchronized void unzip(String zipFileName, String extPlace) throws Exception {
        try {
            (new File(extPlace)).mkdirs();
            File f = new File(zipFileName);
            ZipFile zipFile = new ZipFile(zipFileName);
            if((!f.exists()) && (f.length() <= 0)) {
                throw new Exception("要解压的文件不存在!");
            }
            String strPath, gbkPath, strtemp;
            File tempFile = new File(extPlace);
            strPath = tempFile.getAbsolutePath();
            java.util.Enumeration e = zipFile.getEntries();
            while(e.hasMoreElements()){
                org.apache.tools.zip.ZipEntry zipEnt = (ZipEntry) e.nextElement();
                gbkPath=zipEnt.getName();
                if(zipEnt.isDirectory()){
                    strtemp = strPath + File.separator + gbkPath;
                    File dir = new File(strtemp);
                    dir.mkdirs();
                    continue;
                } else {
                    //读写文件
                    InputStream is = zipFile.getInputStream(zipEnt);
                    BufferedInputStream bis = new BufferedInputStream(is);
                    gbkPath=zipEnt.getName();
                    strtemp = strPath + File.separator + gbkPath;
                
                    //建目录
                    String strsubdir = gbkPath;
                    for(int i = 0; i < strsubdir.length(); i++) {
                        if(strsubdir.substring(i, i + 1).equalsIgnoreCase("/")) {
                            String temp = strPath + File.separator + strsubdir.substring(0, i);
                            File subdir = new File(temp);
                            if(!subdir.exists())
                            subdir.mkdir();
                        }
                    }
                    FileOutputStream fos = new FileOutputStream(strtemp);
                    BufferedOutputStream bos = new BufferedOutputStream(fos);
                    int c;
                    while((c = bis.read()) != -1) {
                        bos.write((byte) c);
                    }
                    bos.close();
                    fos.close();
                }
            }
        } catch(Exception e) {
            e.printStackTrace();
            throw e;
        }
    }
    
    /**
     * 压缩zip格式的压缩文件
     * @param inputFilename 压缩的文件或文件夹及详细路径
     * @param zipFilename 输出文件名称及详细路径
     * @throws IOException
     */
    public synchronized void zip(String inputFilename, String zipFilename) throws IOException {
        zip(new File(inputFilename), zipFilename);
    }
    
    /**
     * 压缩zip格式的压缩文件
     * @param inputFile 需压缩文件
     * @param zipFilename 输出文件及详细路径
     * @throws IOException
     */
    public synchronized void zip(File inputFile, String zipFilename) throws IOException {
        ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFilename));
        try {
            zip(inputFile, out, "");
        } catch (IOException e) {
            throw e;
        } finally {
            out.close();
        }
    }
    
    /**
     * 压缩zip格式的压缩文件
     * @param inputFile 需压缩文件
     * @param out 输出压缩文件
     * @param base 结束标识
     * @throws IOException
     */
    @SuppressWarnings("unused")
    private synchronized void zip(File inputFile, ZipOutputStream out, String base) throws IOException {
        if (inputFile.isDirectory()) {
            File[] inputFiles = inputFile.listFiles();
            out.putNextEntry(new ZipEntry(base + "/"));
            base = base.length() == 0 ? "" : base + "/";
            for (int i = 0; i < inputFiles.length; i++) {
                zip(inputFiles[i], out, base + inputFiles[i].getName());
            }
        } else {
            if (base.length() > 0) {
                out.putNextEntry(new ZipEntry(base));
            } else {
                out.putNextEntry(new ZipEntry(inputFile.getName()));
            }
            FileInputStream in = new FileInputStream(inputFile);
            try {
                int c;
                byte[] by = new byte[BUFFEREDSIZE];
                while ((c = in.read(by)) != -1) {
                    out.write(by, 0, c);
                }
            } catch (IOException e) {
                throw e;
            } finally {
                in.close();
            }
        }
    }    
    public static void main(String[] args) {
        Decompression decompression=new Decompression();
        try {
            decompression.unzipFile("d:/word.zip");
            decompression.unzip("d:/word.zip","d:/word");
            decompression.zip("d:/word", "d:/word.zip");  
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

Answer 4

http://www.lifeispig.cn/article.asp?id=129