zip压缩＋base64加密

Question

各位，有个问题需要大家帮忙，问题是这样的：
           原数据Hello,中国经过zip压缩再经过base64加密得到数据UEsDBBQACAAIAIGMFUMAAAAAAAAAAAAAAAADAAAAemlw80jNycnXebJj7dPZewFQSwcImB9Mhg4AAAAMAAAAUEsBAhQAFAAIAAgAgYwVQ5gfTIYOAAAADAAAAAMAAAAAAAAAAAAAAAAAAAAAAHppcFBLBQYAAAAAAQABADEAAAA/AAAAAAA=，er我得到的数据是eAEBDADz/0hlbGxvLOS4reWbvSS5Bqc=。相差太大了。还请各位帮忙看看。

Answer 1

我用的压缩方法：1,- (NSData *)zlibDeflate
{
        if ([self length] == 0) return self;
    
        z_stream strm;
    
        strm.zalloc = Z_NULL;
        strm.zfree = Z_NULL;
        strm.opaque = Z_NULL;
        strm.total_out = 0;
        strm.next_in=(Bytef *)[self bytes];
        strm.avail_in = [self length];
    
        // Compresssion Levels:
        //   Z_NO_COMPRESSION
        //   Z_BEST_SPEED
        //   Z_BEST_COMPRESSION
        //   Z_DEFAULT_COMPRESSION
    
        if (deflateInit(&strm, Z_NO_COMPRESSION) != Z_OK) return nil;
    
        NSMutableData *compressed = [NSMutableData dataWithLength:16384];  // 16K chuncks for expansion
    
        do {
        
                if (strm.total_out >= [compressed length])
                        [compressed increaseLengthBy: 16384];
        
                strm.next_out = [compressed mutableBytes] + strm.total_out;
                strm.avail_out = [compressed length] - strm.total_out;
        
                deflate(&strm, Z_FINISH);
        
        } while (strm.avail_out == 0);
    
        deflateEnd(&strm);
    
        [compressed setLength: strm.total_out];
        return [NSData dataWithData: compressed];
}
2,- (NSData *)gzipDeflate
{
        if ([self length] == 0) return self;
    
        z_stream strm;
    
        strm.zalloc = Z_NULL;
        strm.zfree = Z_NULL;
        strm.opaque = Z_NULL;
        strm.total_out = 0;
        strm.next_in=(Bytef *)[self bytes];
        strm.avail_in = [self length];
    
        // Compresssion Levels:
        //   Z_NO_COMPRESSION
        //   Z_BEST_SPEED
        //   Z_BEST_COMPRESSION
        //   Z_DEFAULT_COMPRESSION
    
        if (deflateInit2(&strm, Z_DEFAULT_COMPRESSION, Z_DEFLATED, (15+16), 8, Z_DEFAULT_STRATEGY) != Z_OK) return nil;
    
        NSMutableData *compressed = [NSMutableData dataWithLength:16384];  // 16K chunks for expansion
    
        do {
        
                if (strm.total_out >= [compressed length])
                        [compressed increaseLengthBy: 16384];
        
                strm.next_out = [compressed mutableBytes] + strm.total_out;
                strm.avail_out = [compressed length] - strm.total_out;
        
                deflate(&strm, Z_FINISH);
        
        } while (strm.avail_out == 0);
    
        deflateEnd(&strm);
    
        [compressed setLength: strm.total_out];
        return [NSData dataWithData:compressed];
}
一种是zlib压缩 一种是gzip压缩结果都不一样 ，
java源码是package com.g3.biz.util;import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
import org.apache.commons.codec.binary.StringUtils;
import org.apache.commons.codec.binary.Base64;/**
* 压缩解压及Base64工具类
* @author wufuwei
*
*/
public class ZipUtil {
        
        /**
         * Base64解码
         * @param source
         * @return
         */
        private static byte[] decodeBase64(String source) {
                return Base64.decodeBase64(source);
        }        /**
         * base64编码
         * @param source
         * @return
         */
        private static byte[] encodeBase64(byte[] source) {
                return Base64.encodeBase64(source);
        }        /***
         * 压缩Zip
         * @param data
         * @return
         * @throws IOException
         */
        private static byte[] zip(byte[] bContent) {                byte[] b = null;
                try {
                        ByteArrayOutputStream bos = new ByteArrayOutputStream();
                        ZipOutputStream zip = new ZipOutputStream(bos);
                        ZipEntry entry = new ZipEntry("zip");
                        entry.setSize(bContent.length);
                        zip.putNextEntry(entry);
                        zip.write(bContent);
                        zip.closeEntry();
                        zip.close();
                        b = bos.toByteArray();
                        bos.close();
                } catch (Exception ex) {
                        ex.printStackTrace();
                }
                return b;
        }        /***
         * 解压Zip
         * @param data
         * @return
         * @throws IOException
         */
        private static byte[] unZip(byte[] bContent) {
                byte[] b = null;
                try {
                        ByteArrayInputStream bis = new ByteArrayInputStream(bContent);
                        ZipInputStream zip = new ZipInputStream(bis);
                        while (zip.getNextEntry() != null) {
                                byte[] buf = new byte[1024];
                                int num = -1;
                                ByteArrayOutputStream baos = new ByteArrayOutputStream();
                                while ((num = zip.read(buf, 0, buf.length)) != -1) {
                                        baos.write(buf, 0, num);
                                }
                                b = baos.toByteArray();
                                baos.flush();
                                baos.close();
                        }
                        zip.close();
                        bis.close();
                } catch (Exception ex) {
                        ex.printStackTrace();
                }
                return b;
        }        /**
         * zip压缩后进行Base64编码
         * @param source
         * @return
         */
        public static String zipAndEncode(String source) {
                return new String(encodeBase64(zip(StringUtils.getBytesUtf8(source))));
        }        /**
         * Base64解码后进行Zip解压
         * @param source
         * @return
         */
        public static String decodeAndUnzip(String source) {
                return StringUtils.newStringUtf8(unZip(decodeBase64(source)));
        }        public static void main(String[] args) {
        
                String xml = "Hello,中国";
                System.out.println(new String(ZipUtil.encodeBase64(StringUtils.getBytesUtf8(xml))));                String compString = ZipUtil.zipAndEncode(xml);
                System.out.println(compString);                String decompString = ZipUtil.decodeAndUnzip(compString);
                System.out.println(decompString);        }}
麻烦帮忙看看 实在没辙了

Answer 2

用 https://github.com/samsoffes/ssziparchive

Answer 3

搞好了 虽然java搞出来的字符串和ios压缩生成zip包的字符串不一样 但用java的解码能得到一样的结果 说一下 避免下次谁走弯路