Java 创建ZIP和JAR文件

[java]代码库

 
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(); 
    } 
}//源代码片段来自云代码http://yuncode.net