Java压缩和解压文件工具类ZipUtil

1.  ZipUtil.java

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;
/**
* 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, 0 , buffer.length)) != - 1 ) {
                   zos.write(buffer, 0 , 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, 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" );
   }
}


2. IOUtil.java

package com.utility.io;
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         }
   }

}