JAVA功能代码《7》----Java创建ZIP和JAR文件

• Z时代
• 2024-01-10
• 分类：综合

7.Java创建ZIP和JAR文件

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

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