Java压缩文件工具类ZipUtil使用方法代码示例

本文实例通过Java的Zip输入输出流实现压缩和解压文件，前一部分代码实现获取文件路径，压缩文件名的更改等，具体如下：

package com.utility.zip;
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;
import com.utility.io.IOUtil;

public final class ZipUtil {
	private ZipUtil() {
		// empty
	}
	
	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;
	}
	
	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 {
				byte[] buffer = new byte[1024 * 10];
				fis = new FileInputStream(source);
				bis = new BufferedInputStream(fis, buffer.length);
				int read = 0;
				zos.putNextEntry(new ZipEntry(entry));
				while ((read = bis.read(buffer, 0, buffer.length)) != -1) {
					zos.write(buffer, 0, read);
				}
				zos.closeEntry();
			}
			finally {
				IOUtil.closeQuietly(bis, fis);
			}
		}
	}
	
	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;
					byte[] buffer = new byte[1024 * 10];
					while ((read = zis.read(buffer, 0, buffer.length)) != -1) {
						bos.write(buffer, 0, 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");
	}
}

下面是通过IO流工具类实现关闭一个或多个流对象的Java语言描述，获取可关闭的流对象列表，具体如下：

package com.utility.io;
import java.io.Closeable;
import java.io.IOException;

public class IOUtil {
	
	public static void close(Closeable... closeables) throws IOException {
		if (closeables != null) {
			for (Closeable closeable : closeables) {
				if (closeable != null) {
					closeable.close();
				}
			}
		}
	}
	
	public static void closeQuietly(Closeable... closeables) {
		try {
			close(closeables);
		}
		catch (IOException e) {
			// do nothing
		}
	}
}

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