文件解压缩工具类ZipUtil

痛定思痛。 2022-04-12 10:30 234阅读 0赞

package com.imooc.test;
    
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.util.Enumeration;
    import java.util.zip.ZipEntry;
    import java.util.zip.ZipException;
    import java.util.zip.ZipFile;
    import java.util.zip.ZipOutputStream;
    
    
    /**
     * 
     * @version 1.0
     * @since 2015-9-14
     * 文件解压缩工具类
     *
     */
    public final class ZipUtil
    {
    
    	/**
    	 * 缓冲大小
    	 */
    	private static int BUFFERSIZE = 2 << 10;
    	
    	/**
    	 * 压缩
    	 * @param paths
    	 * @param fileName
    	 */
    	public static void zip(String[] paths, String fileName)
    	{
    		
    		ZipOutputStream zos = null;
    		try
    		{
    			zos = new ZipOutputStream(new FileOutputStream(fileName));
    			for(String filePath : paths)
    			{
    				//递归压缩文件
    				File file = new File(filePath);
    				String relativePath = file.getName();
    				if(file.isDirectory())
    				{
    					relativePath += File.separator;
    				}
    				zipFile(file, relativePath, zos);
    			}
    		}
    		catch (IOException e)
    		{
    			e.printStackTrace();
    		}
    		finally
    		{
    			try
    			{
    				if(zos != null)
    				{
    					zos.close();
    				}
    			}
    			catch (IOException e)
    			{
    				e.printStackTrace();
    			}
    		}
    	}
    	
    	public static void zipFile(File file, String relativePath, ZipOutputStream zos)
    	{
    		InputStream is = null;
    		try
    		{
    			if(!file.isDirectory())
    			{
    				ZipEntry zp = new ZipEntry(relativePath);
    				zos.putNextEntry(zp);
    				is = new FileInputStream(file);
    				byte[] buffer = new byte[BUFFERSIZE];
    				int length = 0;
    				while ((length = is.read(buffer)) >= 0)
    				{
    					zos.write(buffer, 0, length);
    				}
    				zos.flush();
    				zos.closeEntry();
    			}
    			else
    			{
    		        for(File f: file.listFiles())
    				{
    	        		zipFile(f, relativePath + f.getName() + File.separator, zos);
    				}
    			}
    		}
    		catch (IOException e)
    		{
    			e.printStackTrace();
    		}
    		finally
    		{
    			try
    			{
    				if(is != null)
    				{
    					is.close();
    				}
    			}
    			catch (IOException e)
    			{
    				e.printStackTrace();
    			}
    		}
    	}
    	
    	/**
    	 * 解压缩
    	 * @param fileName
    	 * @param path
    	 */
    	public static void unzip(String fileName, String path)
    	{
    		FileOutputStream fos = null;
    		InputStream is = null;
    		try
    		{
    			ZipFile zf = new ZipFile(new File(fileName));
    			Enumeration en = zf.entries();
    			while (en.hasMoreElements())
    			{
    				ZipEntry zn = (ZipEntry) en.nextElement();
    				if (!zn.isDirectory())
    				{
    					is = zf.getInputStream(zn);
    					File f = new File(path + zn.getName());
    					File file = f.getParentFile();
    					file.mkdirs();
    					fos = new FileOutputStream(path + zn.getName());
    					int len = 0;
    					byte bufer[] = new byte[BUFFERSIZE];
    					while (-1 != (len = is.read(bufer)))
    					{
    						fos.write(bufer, 0, len);
    					}
    					fos.close();
    				}
    			}
    		}
    		catch (ZipException e)
    		{
    			e.printStackTrace();
    		}
    		catch (IOException e)
    		{
    			e.printStackTrace();
    		}
    		finally
    		{
    			try
    			{
    				if(null != is)
    				{
    					is.close();
    				}
    				if(null != fos)
    				{
    					fos.close();
    				}
    			}
    			catch (IOException e)
    			{
    				e.printStackTrace();
    			}
    		}
    	}
    	
    	/**
    	 * @param args
    	 */
    	public static void main(String[] args)
    	{
    		zip(new String[] {"D:/tmp/20150418/logs/file/2015-08-28/debug-log.log","D:/tmp/20150418/logs/file/2015-08-28/error-log.log"}, "D:/tmp/20150418/logs/file/2015-08-28/test.zip");
    		unzip("D:/tmp/20150418/logs/file/2015-08-28/test.zip", "D:/test/");
    	}
    }