原文:

 

import java.util.zip.*;

import java.io.*;       public class ZipIt {       	public static void main(String args[]) throws IOException { 		if (args.length < 2) {              			System.err.println("usage: java ZipIt Zip.zip file1 file2 file3");               			System.exit(-1);           			}           		File zipFile = new File(args[0]);           		if (zipFile.exists()) {               			System.err.println("Zip file already exists, please try another");			System.exit(-2);          			}           		FileOutputStream fos = new FileOutputStream(zipFile);           		ZipOutputStream zos = new ZipOutputStream(fos);           		int bytesRead;           		byte[] buffer = new byte[1024];           		CRC32 crc = new CRC32();           		for (int i=1, n=args.length; i < n; i++) {               			String name = args[i];               			File file = new File(name);               			if (!file.exists()) {                   				System.err.println("Skipping: " + name);                   				continue;               				}               			BufferedInputStream bis = new BufferedInputStream( new FileInputStream(file));               			crc.reset();               			while ((bytesRead = bis.read(buffer)) != -1) {                   				crc.update(buffer, 0, bytesRead);               				}               			bis.close();               				// Reset to beginning of input stream               			bis = new BufferedInputStream(new FileInputStream(file));               			ZipEntry entry = new ZipEntry(name);               			entry.setMethod(ZipEntry.STORED);              			entry.setCompressedSize(file.length());               			entry.setSize(file.length());               			entry.setCrc(crc.getValue());               			zos.putNextEntry(entry);              			while ((bytesRead = bis.read(buffer)) != -1) {                   				zos.write(buffer, 0, bytesRead);              				}               bis.close();           				}           		zos.close();       				}   	} 		}	}}

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