Java压缩和解压文件工具类ZipUtil

来源：互联网发布：快捷启动移动数据地址编辑：程序博客网时间：2024/05/17 19:57
 
1.  ZipUtil.java
 
package com.utility.zip; 
importjava.io.BufferedInputStream; 
importjava.io.BufferedOutputStream; 
importjava.io.File; 
importjava.io.FileInputStream; 
importjava.io.FileOutputStream; 
importjava.io.IOException; 
importjava.util.zip.ZipEntry; 
importjava.util.zip.ZipInputStream; 
importjava.util.zip.ZipOutputStream; 
importcom.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 { 
    privatestatic byte[] buffer =new byte[1024* 10];
    privateZipUtil() { 
        // empty     } 
    /**
     * 压缩文件
     * 
     * @param filePath
     *            待压缩的文件路径
     * @return 压缩后的文件
     */
    publicstatic File zip(String filePath) {
        File target = null;
        File source = newFile(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 = newFileOutputStream(target); 
               zos = newZipOutputStream(newBufferedOutputStream(fos)); 
               // 添加对应的文件Entry                 addEntry("/", source, zos);
            } catch (IOException e) { 
               throw newRuntimeException(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
     */
    privatestatic 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 = newFileInputStream(source); 
               bis = newBufferedInputStream(fis, buffer.length); 
               int read = 0; 
               zos.putNextEntry(newZipEntry(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
     */
    publicstatic void unzip(String filePath) { 
        File source = newFile(filePath); 
        if (source.exists()) {
            ZipInputStream zis = null;
            BufferedOutputStream bos = null;
            try { 
               zis = newZipInputStream(newFileInputStream(source)); 
               ZipEntry entry = null;
               while ((entry = zis.getNextEntry()) !=null && !entry.isDirectory()) {
                   File target = newFile(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(newFileOutputStream(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 newRuntimeException(e); 
            } finally { 
               IOUtil.closeQuietly(zis, bos); 
            } 
        } 
    }
    publicstatic 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; 
importjava.io.Closeable; importjava.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
     */
    publicstatic 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
     */
    publicstatic void closeQuietly(Closeable... closeables) { 
        try { 
            close(closeables); 
        } catch (IOException e) { 
            // do nothing         } 
    }
}
0 0