Java中创建zip和jar文件，java创建zipjar,import java.

Java中创建zip和jar文件，java创建zipjar,import java.

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);        }        http://www.byrx.net        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();    }}