Java压缩和解压文件工具类ZipUtil

用于服务器端打包文件的，将压缩后的文件写入到response输出流即可实现在服务器端打包下载，支持多级目录嵌套。
测试时可以先用ZipUtil.zip压缩某个文件夹test，得到压缩文件test.zip，然后将文件夹test删除，用ZipUtil.unzip解压test.zip即可还原。

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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.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
 
 
/**
 * 通过Java的Zip输入输出流实现压缩和解压文件
 * 
 * @author liujiduo
 * 
 */
public final class ZipUtil {
 
    private static byte[] buffer = new byte[1024 * 10];
 
    private ZipUtil() {
        // empty
    }
 
    /**
     * 压缩文件
     * 
     * @param filePath
     *            待压缩的文件路径
     * @return 压缩后的文件
     */
    public static File zip(String filePath) {
        File target = null;
        File source = new File(filePath);
        if (source.exists()) {
            // 压缩文件名=源文件名.zip
            String zipName = source.getName() + ".zip";
            target = new File(source.getParent(),zipName);
            if (target.exists()) {
                target.delete(); // 删除旧的文件
            }
            FileOutputStream fos = null;
            ZipOutputStream zos = null;
            try {
                fos = new FileOutputStream(target);
                zos = new ZipOutputStream(new BufferedOutputStream(fos));
                // 添加对应的文件Entry
                addEntry("/",source,zos);
            } catch (IOException e) {
                throw new RuntimeException(e);
            } finally {
                IOUtil.closeQuietly(zos,fos);
            }
        }
        return target;
    }
 
    /**
     * 扫描添加文件Entry
     * 
     * @param base
     *            基路径
     * 
     * @param source
     *            源文件
     * @param zos
     *            Zip文件输出流
     * @throws IOException
     */
    private static void addEntry(String base,File source,ZipOutputStream zos)
            throws IOException {
        // 按目录分级，形如：/aaa/bbb.txt
        String entry = base + source.getName();
        if (source.isDirectory()) {
            for (File file : source.listFiles()) {
                // 递归列出目录下的所有文件，添加文件Entry
                addEntry(entry + "/",file,zos);
            }
        } else {
            FileInputStream fis = null;
            BufferedInputStream bis = null;
            try {
                fis = new FileInputStream(source);
                bis = new BufferedInputStream(fis,buffer.length);
                int read = 0;
                zos.putNextEntry(new ZipEntry(entry));
                while ((read = bis.read(buffer,buffer.length)) != -1) {
                    zos.write(buffer,read);
                }
                zos.closeEntry();
            } finally {
                IOUtil.closeQuietly(bis,fis);
            }
        }
    }
 
    /**
     * 解压文件
     * 
     * @param filePath
     *            压缩文件路径
     */
    public static void unzip(String filePath) {
        File source = new File(filePath);
        if (source.exists()) {
            ZipInputStream zis = null;
            BufferedOutputStream bos = null;
            try {
                zis = new ZipInputStream(new FileInputStream(source));
                ZipEntry entry = null;
                while ((entry = zis.getNextEntry()) != null && !entry.isDirectory()) {
                    File target = new File(source.getParent(),entry.getName());
                    if (!target.getParentFile().exists()) {
                        // 创建文件父目录
                        target.getParentFile().mkdirs();
                    }
                    // 写入文件
                    bos = new BufferedOutputStream(new FileOutputStream(target));
                    int read = 0;
                    while ((read = zis.read(buffer,buffer.length)) != -1) {
                        bos.write(buffer,read);
                    }
                    bos.flush();
                }
                zis.closeEntry();
            } catch (IOException e) {
                throw new RuntimeException(e);
            } finally {
                IOUtil.closeQuietly(zis,bos);
            }
        }
    }
 
    public static void main(String[] args) {
        String targetPath = "E:Win7壁纸";
        File file = ZipUtil.zip(targetPath);
        System.out.println(file);
        ZipUtil.unzip("F:Win7壁纸.zip");
    }
}

import java.io.Closeable;
import java.io.IOException;
 
/**
 * IO流工具类
 * 
 * @author liujiduo
 * 
 */
public class IOUtil {
    /**
     * 关闭一个或多个流对象
     * 
     * @param closeables
     *            可关闭的流对象列表
     * @throws IOException
     */
    public static void close(Closeable... closeables) throws IOException {
        if (closeables != null) {
            for (Closeable closeable : closeables) {
                if (closeable != null) {
                    closeable.close();
                }
            }
        }
    }
 
    /**
     * 关闭一个或多个流对象
     * 
     * @param closeables
     *            可关闭的流对象列表
     */
    public static void closeQuietly(Closeable... closeables) {
        try {
            close(closeables);
        } catch (IOException e) {
            // do nothing
        }
    }
 
}