用ZIP进行多文件保存

深藏阁楼爱情的钟 2022-08-20 07:20 120阅读 0赞

package Number_1802;
    
    import java.io.*;
    import java.util.Enumeration;
    import java.util.zip.*;
    
    /**
     * 用Zip进行多文件保存
     * 
     * checksum 有两种类型 Adler32(速度快) , CRC32(速度慢些，但准确率高)
     * 
     * @author he
     * 
     */
    public class P569 {
    
    	public static void main(String[] args) throws IOException {
    		// 创建一个zip文件
    		ZipOutputStream zos = new ZipOutputStream(new CheckedOutputStream(
    				new FileOutputStream("F:/IOtest/b/Ziptest.zip"), new Adler32()));
    		BufferedOutputStream out = new BufferedOutputStream(zos);
    
    		zos.setComment("A test of java ZIP");
    
    		System.out.println("write file");
    
    		BufferedReader in = new BufferedReader(new FileReader(
    				"F:/workspace/Java Thinking002/src/Number_1802/P569.java"));
    		// 往压缩文件中添加条目 即把P569.java添加到压缩文件中去
    		zos.putNextEntry(new ZipEntry("P569.java"));
    
    		int a;
    		while ((a = in.read()) != -1) {
    			out.write(a);
    		}
    
    		in.close();
    		out.flush();
    		out.close();
    
    		// 读取解压缩文件
    		ZipInputStream zis = new ZipInputStream(new CheckedInputStream(
    				new FileInputStream("F:/IOtest/b/Ziptest.zip"), new Adler32()));
    
    		BufferedReader in2 = new BufferedReader(new InputStreamReader(zis));
    		ZipEntry z;
    		while ((z = zis.getNextEntry()) != null) {
    			System.out.println("File read: " + z);
    			// 用下面几种方式打印均可
    			// int c;
    			// while ((c=in2.read())!=-1) {
    			// System.out.print((char)c);
    			// // System.out.write(c);
    			// }
    			String s;
    			while ((s = in2.readLine()) != null) {
    				System.out.println(s);
    			}
    
    		}
    
    		ZipFile zFile = new ZipFile("F:/IOtest/b/Ziptest.zip");
    		//返回枚举类型的条目
    		Enumeration e = zFile.entries();
    		while (e.hasMoreElements()) {
    			ZipEntry entry = (ZipEntry) e.nextElement();
    			System.out.println("压缩条目：" + entry);
    
    		}
    
    	}
    }