Java JDK 内置 ZIP 压缩与解压流示例

Java JDK 内置 ZIP 压缩与解压流

以下代码展示了如何使用 JDK 自带的 java.util.zip 包实现字节数组的压缩与解压功能。

package com.test.java.zip;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;

public class ZipUtil {
    /**
     * 压缩方法
     */
    public static byte[] zip(byte[] source) throws IOException {
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        ZipOutputStream zipOutputStream = new ZipOutputStream(byteArrayOutputStream);
        zipOutputStream.putNextEntry(new ZipEntry("0"));
        BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(zipOutputStream);
        bufferedOutputStream.write(source);
        bufferedOutputStream.close();
        return byteArrayOutputStream.toByteArray();
    }

    
      [] unzip([] source)  IOException {
            ( (source));
         (zipInputStream.getNextEntry() != ) {
                ();
            [] buffer =  [];
               ;
             ((i = zipInputStream.read(buffer)) != -) {
                byteArrayOutputStream.write(buffer, , i);
            }
             byteArrayOutputStream.toByteArray();
        }
         ;
    }

         IOException {
        
           ;
           ;
            ( (file));
        [] bytes1 =  [bufferedInputStream.available()];
        bufferedInputStream.read(bytes1);
        bufferedInputStream.close();
        System.out.println( + bytes1.length);

        
        [] bytes2 = ZipUtil.zip(bytes1);
        System.out.println( + bytes2.length);

        
        [] bytes3 = ZipUtil.unzip(bytes2);
        System.out.println( + bytes3.length);

        
            ( (outFile));
        bufferedOutputStream.write(bytes3);
        bufferedOutputStream.close();
    }
}