使用zip對文件或文件夾進行壓縮, 解壓縮

使用zip對文件或文件夾進行壓縮, 解壓縮

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;

/**
* 對文件或文件夾進行壓縮和解壓
*
*/
public
class ZipUtil {
    /**得到當前系統的分隔符*/
//  private static String separator = System.getProperty("file.separator");

    /**
     * 添加到壓縮文件中
     * @param out
     * @param f
     * @param base
     * @throws Exception
     */
    private
void directoryZip(ZipOutputStream out, File f, String base)
throws Exception {
        // 如果傳入的是目錄
        if (f.isDirectory()) {
            File[] fl = f.listFiles();
            // 創建壓縮的子目錄
            out.putNextEntry(new ZipEntry(base +
"/"));
            if (base.length() ==
0) {
                base = "";
            } else {
                base = base + "/";
            }
            for (int i =
0; i < fl.length; i++) {
                directoryZip(out, fl[i], base + fl[i].getName());
            }
        } else {
            // 把壓縮文件加入rar中
            out.putNextEntry(new ZipEntry(base));
            FileInputStream in = new FileInputStream(f);
            byte[] bb =
new
byte[10240];
            int aa =
0;
            while ((aa = in.read(bb)) != -1) {
                out.write(bb, 0, aa);
            }
            in.close();
        }
    }

    /**
     * 壓縮文件
     *
     * @param zos
     * @param file
     * @throws Exception
     */
    private
void fileZip(ZipOutputStream zos, File file)
throws Exception {
        if (file.isFile()) {
            zos.putNextEntry(new ZipEntry(file.getName()));
            FileInputStream fis = new FileInputStream(file);
            byte[] bb =
new
byte[10240];
            int aa =
0;
            while ((aa = fis.read(bb)) != -1) {
                zos.write(bb, 0, aa);
            }
            fis.close();
            System.out.println(file.getName());
        } else {
            directoryZip(zos, file, "");
        }
    }

    /**
     * 解壓縮文件
     *
     * @param zis
     * @param file
     * @throws Exception
     */
    private
void fileUnZip(ZipInputStream zis, File file)
throws Exception {
        ZipEntry zip = zis.getNextEntry();
        if (zip ==
null)
            return;
        String name = zip.getName();
        File f = new File(file.getAbsolutePath() +
"/" + name);
        if (zip.isDirectory()) {
            f.mkdirs();
            fileUnZip(zis, file);
        } else {
            f.createNewFile();
            FileOutputStream fos = new FileOutputStream(f);
            byte b[] =
new
byte[10240];
            int aa =
0;
            while ((aa = zis.read(b)) != -1) {
                fos.write(b, 0, aa);
            }
            fos.close();
            fileUnZip(zis, file);
        }
    }

    /**
     * 根據filePath創建相應的目錄
     * @param filePath
     * @return
     * @throws IOException
     */
    private File mkdirFiles(String filePath)
throws IOException{
        File file = new File(filePath);
        if(!file.getParentFile().exists()){
            file.getParentFile().mkdirs();
        }
        file.createNewFile();

        return file;
    }

    /**
     * 對zipBeforeFile目錄下的文件壓縮，保存爲指定的文件zipAfterFile
     *
     * @param zipBeforeFile     壓縮之前的文件
     * @param zipAfterFile      壓縮之後的文件
     */
    public
void zip(String zipBeforeFile, String zipAfterFile) {
        try {

            ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(mkdirFiles(zipAfterFile)));
            fileZip(zos, new File(zipBeforeFile));
            zos.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 解壓縮文件unZipBeforeFile保存在unZipAfterFile目錄下
     *
     * @param unZipBeforeFile       解壓之前的文件
     * @param unZipAfterFile        解壓之後的文件
     */
    public
void unZip(String unZipBeforeFile, String unZipAfterFile) {
        try {
            ZipInputStream zis = new ZipInputStream(new FileInputStream(unZipBeforeFile));
            File f = new File(unZipAfterFile);
            f.mkdirs();
            fileUnZip(zis, f);
            zis.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}