如何使用Java创建非常具体的zip文件结构 [英] How to create a very specific zip file structure using Java
问题描述
我正在开发要集成到旧系统中的软件，在该系统中，我将zip文件发送到FTP服务器，并且旧系统会定期扫描以将文件转储到已完成"或可能被损坏"文件夹中.
我的文件被系统地转储到"maybe_corrupted"文件夹中.经过调查，看来这是由于zip文件的结构所致.
如果我从FTP将文件下载到Windows计算机上，则会解压缩所有zip文件(zip文件中有zip文件)，然后将文件重新压缩为与旧程序接受文件完全相同的配置.
具体来说，我的问题是 - 如何参数化 java.util.zip，我应该修改哪些参数以使其更接近默认的 Windows zip 实用程序?
文件比较
根据Tobias Otto的建议，我使用了文件比较器(
邮编详细信息
根据David Duponchel的建议，我使用了 zipdetails 提取每个文件的结构.显然，这是一个非常强大的工具，但是我不确定如何解释输出，如使用指南中所述，输出引用了 解压缩后重新压缩的文件: zip文件的结构 创建zip文件的代码 压缩方法 按照 Zip文件的主要参考文件: 4.1.3数据压缩可以用来减小放置在ZIP文件中的文件的大小，但这不是必需的.此格式支持使用多种数据压缩算法.当压缩为使用时，必须使用已记录的压缩算法之一.建议实施者尝试将其数据用于确定哪种可用算法可提供最佳效果压缩他们的需求. 压缩方法8(Deflate)是大多数与ZIP兼容的应用程序默认使用的方法程序 . 在这种特定情况下，使用 我讨厌猜测而无法验证我的假设，因此对FTP服务器上实际服务器端文件检查器的可用性的评论/问题，但是对于它的价值，并假设检查者更喜欢 这里的问题是，使用 驱动程序应用程序: ZIP实用程序: 也许您可以尝试并向我提供反馈.如果这还不够好，并且检查人员仍然抱怨，我们可以尝试其他方法来使zip存档更加相似. I am developing software to integrate into a legacy system, where I send zip files to an FTP server and the legacy system scans periodically dumping the files into a folder, either "Completed" or "Maybe_corrupted". My files are systematically dumped into the "maybe_corrupted" folder. After investigation it appears that this is due the structure of the zip files. If I download the file from the FTP onto a Windows computer, I unzip all of the zip files (there are zip files inside zip files) and rezip the files into the exact same configuration the legacy program accepts the files. Specifically, my question is - how can I parameterize java.util.zip, and what parameters should I modify to bring it closer to the default windows zip utility ? File comparison As suggested by Tobias Otto, I have used a file comparator (UltraCompare) to do a comparison between 2 binary files : Simply comparing the bytes, it is apparent that the files are not the same. Note that bytes in red are differences, grey are similarities : Zip details As suggested by David Duponchel, I have used zipdetails to extract the structure of each file. Obviously this is a very powerful tool but I'm not sure how to interpret the ouput, as stated in the usage guide, the output makes reference to this document. Original file : Decompressed-recompressed file : Structure of the zip file Code to create zip file Compression method As per the primary reference for Zip files : 4.1.3 Data compression MAY be used to reduce the size of files placed into a ZIP file, but is not required. This format supports the
use of multiple data compression algorithms. When compression is
used, one of the documented compression algorithms MUST be used.
Implementors are advised to experiment with their data to
determine which of the available algorithms provides the best
compression for their needs. Compression method 8 (Deflate) is the
method used by default by most ZIP compatible application
programs. In this specific case, using I hate guessing without being able to verify my assumptions, thus the comment/question about the availability of the actual server-side file checker on the FTP server, but for what it is worth and just assuming that the checker prefers The problem here is that when using Driver application: ZIP utility: Maybe you can try that and provide me with feedback. If this is not good enough and the checker still complains, we can try something else to make the zip archives even more similar. 这篇关于如何使用Java创建非常具体的zip文件结构的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！ <代码> 00000 LOCAL HEADER#1 04034B5000004提取Zip Spec 14'2.0'00005解压缩OS 00'MS-DOS'00006通用标志000000008压缩方法0000'已存储'0000A Last Mod Time 491E510F'2016年8月30日星期二10:08:30'0000E CRC 218B916200012压缩长度0000559500016未压缩长度000055950001A文件名长度00180001C额外长度00000001E文件名'Mean.20160830_070000.zip'00036有效载荷055CB局部接头#2 04034B50055CF提取邮政编码规范14'2.0'055D0 提取 OS 00 'MS-DOS'055D1通用标志0000055D3压缩方法0000'已存储'055D5最后修改时间491E5117'2016年8月30日星期二10:08:46'055D9 CRC 180124FD055DD压缩长度00005972055E1未压缩长度00005972055E5文件名长度0018055E7额外长度0000055E9文件名'Mean.20160830_071500.zip'05601 有效载荷0AF73局部头#3 04034B500AF77 提取邮编规范 14 '2.0'0AF78提取OS 00'MS-DOS'0AF79通用标志00000AF7B压缩方法0000'已存储'0AF7D最后修改时间491E511D'Tue Aug 30 10:08:58 2016'0AF81 CRC 03A4486C0AF85压缩长度000059530AF89未压缩长度000059530AF8D文件名长度00180AF8F额外长度00000AF91文件名'Mean.20160830_073000.zip'0AFA9有效载荷108FC 本地接头 #4 04034B5010900提取邮政编码规范14'2.0'10901提取OS 00'MS-DOS'10902通用标志000010904压缩方法0000'已存储'10906 Last Mod Time 491E5124'Tue Aug 30 10:09:08 2016'1090A CRC FEE971721090E压缩长度0000881810912未压缩长度0000881810916文件名长度001810918 额外长度 00001091A文件名'Mean.20160830_080000.zip'10932有效负载1914A LOCAL HEADER#5 04034B501914E Extract Zip Spec 14'2.0'1914F提取OS 00'MS-DOS'19150通用标志000019152压缩方法0000'已存储'19154 Last Mod Time 491E5129'Tue Aug 30 10:09:18 2016'19158 CRC 0B38337E1915C压缩长度0000471319160未压缩长度0000471319164文件名长度001819166额外长度000019168文件名'Mean.20160830_081500.zip'19180有效负载1D893中心接头#1 02014B501D897创建了Zip Spec 14'2.0'1D898创建OS 00'MS-DOS'1D899提取Zip Spec 14'2.0'1D89A提取OS 00'MS-DOS'1D89B通用标志00001D89D压缩方法0000``存储''1D89F Last Mod Time 491E510F'2016年8月30日星期二10:08:30'1D8A3 CRC 218B91621D8A7压缩长度000055951D8AB未压缩长度000055951D8AF文件名长度00181D8B1额外长度00001D8B3注释长度00001D8B5磁盘启动00001D8B7 Int文件属性0000[位0] 0'二进制数据'1D8B9 Ext文件属性00000020[第5位]封存1D8BD本地头偏移量000000001D8C1文件名'Mean.20160830_070000.zip'1D8D9中心接头#2 02014B501D8DD创建了Zip Spec 14'2.0'1D8DE创建的OS 00'MS-DOS'1D8DF Extract Zip Spec 14'2.0'1D8E0提取OS 00'MS-DOS'1D8E1通用标志00001D8E3压缩方法0000'已存储'1D8E5最后修改时间491E5117'2016年8月30日星期二10:08:46'1D8E9 CRC 180124FD1D8ED压缩长度000059721D8F1未压缩长度000059721D8F5文件名长度00181D8F7额外长度00001D8F9注释长度00001D8FB磁盘启动00001D8FD Int文件属性0000[位0] 0'二进制数据'1D8FF Ext文件属性00000020[第5位]封存1D903 本地头偏移 000055CB1D907文件名'Mean.20160830_071500.zip'1D91F中心接头#3 02014B501D923创建了Zip Spec 14'2.0'1D924创建OS 00'MS-DOS'1D925提取邮政编码规范14'2.0'1D926提取OS 00'MS-DOS'1D927通用标志00001D929压缩方法0000'已存储'1D92B最后修改时间491E511D'2016年8月30日星期二10:08:58'1D92F CRC 03A4486C1D933压缩长度000059531D937未压缩长度000059531D93B文件名长度00181D93D额外长度00001D93F评论长度00001D941磁盘启动00001D943内部文件属性0000[位0] 0'二进制数据'1D945 Ext文件属性00000020[第5位]封存1D949本地头偏移0000AF731D94D文件名'Mean.20160830_073000.zip'1D965中心接头#4 02014B501D969创建了Zip Spec 14'2.0'1D96A创建的OS 00'MS-DOS'1D96B Extract Zip Spec 14'2.0'1D96C提取OS 00'MS-DOS'1D96D通用标志00001D96F压缩方法0000'已存储'1D971 Last Mod Time 491E5124'Tue Aug 30 10:09:08 2016'1D975 CRC FEE971721D979压缩长度000088181D97D未压缩长度000088181D981文件名长度00181D983额外长度00001D985评论长度00001D987磁盘启动00001D989内部文件属性0000[位0] 0'二进制数据'1D98B Ext文件属性00000020[第5位]封存1D98F 本地头偏移 000108FC1D993文件名'Mean.20160830_080000.zip'1D9AB中心接头#5 02014B501D9AF创建了Zip Spec 14'2.0'1D9B0创建的OS 00'MS-DOS'1D9B1提取邮政编码规范14'2.0'1D9B2 提取 OS 00 'MS-DOS'1D9B3 通用标志 00001D9B5压缩方法0000'已存储'1D9B7最后修改时间491E5129'2016年8月30日星期二10:09:18'1D9BB CRC 0B38337E1D9BF压缩长度000047131D9C3未压缩长度000047131D9C7文件名长度00181D9C9额外长度00001D9CB评论长度00001D9CD磁盘起始00001D9CF Int文件属性0000[位0] 0'二进制数据'1D9D1 Ext文件属性00000020[第5位]封存1D9D5本地头偏移0001914A1D9D9文件名'Mean.20160830_081500.zip'1D9F1结束中心接头06054B501D9F5该磁盘号00001D9F7中央目录磁盘号00001D9F9磁盘0005中的条目1D9FB总条目00051D9FD中央目录0000015E的大小1DA01偏移到中央目录0001D8931DA05注释长度0000完毕
public void addToZip(File zipFile，File ... filesToAdd){最后一个字节[]缓冲区=新字节[1024]；FileOutputStream fos = new FileOutputStream(zipFile.getAbsoluteFile());ZipOutputStream zos =新的ZipOutputStream(fos);对于(File fileToAdd:filesToAdd){ZipEntry条目=新的ZipEntry(fileToAdd.getName());尝试 {zos.putNextEntry(entry);尝试(FileInputStream in = new FileInputStream(input.getAbsoluteFile())){英伦而(((len = in.read(buffer))> 0){zos.write(缓冲区，0，len);}}zos.closeEntry();}}尝试 {zos.finish();zos.close();} catch(IOException ex){LOGGER.log(Level.SEVERE，null，ex);}} zipEntry.setMethod(ZipEntry.DEFLATED); 不足以使我的文件被旧版程序接受. STORED 条目而不是 DEFLATED 条目，这是您可以创建的方式 STORED 条目时，还必须为每个条目设置(未压缩)压缩大小和CRC.这就是您的操作方式(不幸的是，我读取了每个嵌套的ZIP文件两次，一次用于计算CRC，一次将其内容复制到ZIP输出流):
程序包de.scrum_master.app;导入java.io.File;导入java.io.IOException;导入 java.util.SortedMap;导入java.util.TreeMap;公共类申请{公共静态void main(String [] args)引发IOException {SortedMap<文件，文件[]>fileMappings = new TreeMap<>();fileMappings.put(新文件("books.zip")，新File [] {新File("books.xml")});fileMappings.put(新文件("cds.zip")，新File [] {新File("cds.xml")});fileMappings.put(新文件("clothes.zip")，新File [] {新File("clothes.xml")});ZipTool zipTool =新的ZipTool();对于(文件zipFile:fileMappings.keySet())zipTool.addToZip(zipFile，fileMappings.get(zipFile));zipTool.addToZip(新File("archive.zip")，新File [] {新File("books.zip")，新File("cds.zip")，新File("clothes.zip")});}} package de.scrum_master.app;导入java.io.File;导入java.io.FileInputStream;导入java.io.FileOutputStream;导入java.io.IOException;导入java.util.zip.CRC32;导入java.util.zip.ZipEntry;导入java.util.zip.ZipOutputStream;公共类ZipTool {公共无效addToZip(File zipFile，File ... filesToAdd)引发IOException {尝试 (FileOutputStream fos = new FileOutputStream(zipFile.getAbsoluteFile());ZipOutputStream zos =新的ZipOutputStream(fos)){最后一个字节[]缓冲区=新字节[1024]；对于(File fileToAdd:filesToAdd){ZipEntry条目=新的ZipEntry(fileToAdd.getName());如果(fileToAdd.getName().endsWith(.zip")){entry.setMethod(ZipEntry.STORED);long fileSize = fileToAdd.length();entry.setSize(fileSize);entry.setCompressedSize(fileSize);CRC32 crc32 =新的CRC32();尝试(FileInputStream in = new FileInputStream(fileToAdd.getAbsoluteFile())){英伦而(((len = in.read(buffer))> 0){crc32.update(buffer，0，len);}}entry.setCrc(crc32.getValue());}zos.putNextEntry(entry);尝试(FileInputStream in = new FileInputStream(fileToAdd.getAbsoluteFile())){英伦而(((len = in.read(buffer))> 0){zos.write(缓冲区，0，len);}}zos.closeEntry();}}}}
00000 LOCAL HEADER #1 04034B50
00004 Extract Zip Spec 14 '2.0'
00005 Extract OS 00 'MS-DOS'
00006 General Purpose Flag 0808
[Bits 1-2] 0 'Normal Compression'
[Bit 3] 1 'Streamed'
[Bit 11] 1 'Language Encoding'
00008 Compression Method 0008 'Deflated'
0000A Last Mod Time 491E43F7 'Tue Aug 30 08:31:46 2016'
0000E CRC 00000000
00012 Compressed Length 00000000
00016 Uncompressed Length 00000000
0001A Filename Length 0018
0001C Extra Length 0000
0001E Filename 'Mean.20160830_073000.zip'
00036 PAYLOAD
05002 STREAMING DATA HEADER 08074B50
05006 CRC A21A5BC4
0500A Compressed Length 00004FCC
0500E Uncompressed Length 000054D8
05012 LOCAL HEADER #2 04034B50
05016 Extract Zip Spec 14 '2.0'
05017 Extract OS 00 'MS-DOS'
05018 General Purpose Flag 0808
[Bits 1-2] 0 'Normal Compression'
[Bit 3] 1 'Streamed'
[Bit 11] 1 'Language Encoding'
0501A Compression Method 0008 'Deflated'
0501C Last Mod Time 491E43F7 'Tue Aug 30 08:31:46 2016'
05020 CRC 00000000
05024 Compressed Length 00000000
05028 Uncompressed Length 00000000
0502C Filename Length 0018
0502E Extra Length 0000
05030 Filename 'Mean.20160830_081500.zip'
05048 PAYLOAD
08FFF STREAMING DATA HEADER 08074B50
09003 CRC BAE824D6
09007 Compressed Length 00003FB7
0900B Uncompressed Length 000043A3
0900F LOCAL HEADER #3 04034B50
09013 Extract Zip Spec 14 '2.0'
09014 Extract OS 00 'MS-DOS'
09015 General Purpose Flag 0808
[Bits 1-2] 0 'Normal Compression'
[Bit 3] 1 'Streamed'
[Bit 11] 1 'Language Encoding'
09017 Compression Method 0008 'Deflated'
09019 Last Mod Time 491E43F7 'Tue Aug 30 08:31:46 2016'
0901D CRC 00000000
09021 Compressed Length 00000000
09025 Uncompressed Length 00000000
09029 Filename Length 0018
0902B Extra Length 0000
0902D Filename 'Mean.20160830_071500.zip'
09045 PAYLOAD
0E05E STREAMING DATA HEADER 08074B50
0E062 CRC EDC8AE4E
0E066 Compressed Length 00005019
0E06A Uncompressed Length 000054EA
0E06E LOCAL HEADER #4 04034B50
0E072 Extract Zip Spec 14 '2.0'
0E073 Extract OS 00 'MS-DOS'
0E074 General Purpose Flag 0808
[Bits 1-2] 0 'Normal Compression'
[Bit 3] 1 'Streamed'
[Bit 11] 1 'Language Encoding'
0E076 Compression Method 0008 'Deflated'
0E078 Last Mod Time 491E43F7 'Tue Aug 30 08:31:46 2016'
0E07C CRC 00000000
0E080 Compressed Length 00000000
0E084 Uncompressed Length 00000000
0E088 Filename Length 0018
0E08A Extra Length 0000
0E08C Filename 'Mean.20160830_080000.zip'
0E0A4 PAYLOAD
15444 STREAMING DATA HEADER 08074B50
15448 CRC C37437FB
1544C Compressed Length 000073A0
15450 Uncompressed Length 00008054
15454 LOCAL HEADER #5 04034B50
15458 Extract Zip Spec 14 '2.0'
15459 Extract OS 00 'MS-DOS'
1545A General Purpose Flag 0808
[Bits 1-2] 0 'Normal Compression'
[Bit 3] 1 'Streamed'
[Bit 11] 1 'Language Encoding'
1545C Compression Method 0008 'Deflated'
1545E Last Mod Time 491E43F7 'Tue Aug 30 08:31:46 2016'
15462 CRC 00000000
15466 Compressed Length 00000000
1546A Uncompressed Length 00000000
1546E Filename Length 0018
15470 Extra Length 0000
15472 Filename 'Mean.20160830_070000.zip'
1548A PAYLOAD
19E5D STREAMING DATA HEADER 08074B50
19E61 CRC 40E52180
19E65 Compressed Length 000049D3
19E69 Uncompressed Length 00005110
19E6D CENTRAL HEADER #1 02014B50
19E71 Created Zip Spec 14 '2.0'
19E72 Created OS 00 'MS-DOS'
19E73 Extract Zip Spec 14 '2.0'
19E74 Extract OS 00 'MS-DOS'
19E75 General Purpose Flag 0808
[Bits 1-2] 0 'Normal Compression'
[Bit 3] 1 'Streamed'
[Bit 11] 1 'Language Encoding'
19E77 Compression Method 0008 'Deflated'
19E79 Last Mod Time 491E43F7 'Tue Aug 30 08:31:46 2016'
19E7D CRC A21A5BC4
19E81 Compressed Length 00004FCC
19E85 Uncompressed Length 000054D8
19E89 Filename Length 0018
19E8B Extra Length 0000
19E8D Comment Length 0000
19E8F Disk Start 0000
19E91 Int File Attributes 0000
[Bit 0] 0 'Binary Data'
19E93 Ext File Attributes 00000000
19E97 Local Header Offset 00000000
19E9B Filename 'Mean.20160830_073000.zip'
19EB3 CENTRAL HEADER #2 02014B50
19EB7 Created Zip Spec 14 '2.0'
19EB8 Created OS 00 'MS-DOS'
19EB9 Extract Zip Spec 14 '2.0'
19EBA Extract OS 00 'MS-DOS'
19EBB General Purpose Flag 0808
[Bits 1-2] 0 'Normal Compression'
[Bit 3] 1 'Streamed'
[Bit 11] 1 'Language Encoding'
19EBD Compression Method 0008 'Deflated'
19EBF Last Mod Time 491E43F7 'Tue Aug 30 08:31:46 2016'
19EC3 CRC BAE824D6
19EC7 Compressed Length 00003FB7
19ECB Uncompressed Length 000043A3
19ECF Filename Length 0018
19ED1 Extra Length 0000
19ED3 Comment Length 0000
19ED5 Disk Start 0000
19ED7 Int File Attributes 0000
[Bit 0] 0 'Binary Data'
19ED9 Ext File Attributes 00000000
19EDD Local Header Offset 00005012
19EE1 Filename 'Mean.20160830_081500.zip'
19EF9 CENTRAL HEADER #3 02014B50
19EFD Created Zip Spec 14 '2.0'
19EFE Created OS 00 'MS-DOS'
19EFF Extract Zip Spec 14 '2.0'
19F00 Extract OS 00 'MS-DOS'
19F01 General Purpose Flag 0808
[Bits 1-2] 0 'Normal Compression'
[Bit 3] 1 'Streamed'
[Bit 11] 1 'Language Encoding'
19F03 Compression Method 0008 'Deflated'
19F05 Last Mod Time 491E43F7 'Tue Aug 30 08:31:46 2016'
19F09 CRC EDC8AE4E
19F0D Compressed Length 00005019
19F11 Uncompressed Length 000054EA
19F15 Filename Length 0018
19F17 Extra Length 0000
19F19 Comment Length 0000
19F1B Disk Start 0000
19F1D Int File Attributes 0000
[Bit 0] 0 'Binary Data'
19F1F Ext File Attributes 00000000
19F23 Local Header Offset 0000900F
19F27 Filename 'Mean.20160830_071500.zip'
19F3F CENTRAL HEADER #4 02014B50
19F43 Created Zip Spec 14 '2.0'
19F44 Created OS 00 'MS-DOS'
19F45 Extract Zip Spec 14 '2.0'
19F46 Extract OS 00 'MS-DOS'
19F47 General Purpose Flag 0808
[Bits 1-2] 0 'Normal Compression'
[Bit 3] 1 'Streamed'
[Bit 11] 1 'Language Encoding'
19F49 Compression Method 0008 'Deflated'
19F4B Last Mod Time 491E43F7 'Tue Aug 30 08:31:46 2016'
19F4F CRC C37437FB
19F53 Compressed Length 000073A0
19F57 Uncompressed Length 00008054
19F5B Filename Length 0018
19F5D Extra Length 0000
19F5F Comment Length 0000
19F61 Disk Start 0000
19F63 Int File Attributes 0000
[Bit 0] 0 'Binary Data'
19F65 Ext File Attributes 00000000
19F69 Local Header Offset 0000E06E
19F6D Filename 'Mean.20160830_080000.zip'
19F85 CENTRAL HEADER #5 02014B50
19F89 Created Zip Spec 14 '2.0'
19F8A Created OS 00 'MS-DOS'
19F8B Extract Zip Spec 14 '2.0'
19F8C Extract OS 00 'MS-DOS'
19F8D General Purpose Flag 0808
[Bits 1-2] 0 'Normal Compression'
[Bit 3] 1 'Streamed'
[Bit 11] 1 'Language Encoding'
19F8F Compression Method 0008 'Deflated'
19F91 Last Mod Time 491E43F7 'Tue Aug 30 08:31:46 2016'
19F95 CRC 40E52180
19F99 Compressed Length 000049D3
19F9D Uncompressed Length 00005110
19FA1 Filename Length 0018
19FA3 Extra Length 0000
19FA5 Comment Length 0000
19FA7 Disk Start 0000
19FA9 Int File Attributes 0000
[Bit 0] 0 'Binary Data'
19FAB Ext File Attributes 00000000
19FAF Local Header Offset 00015454
19FB3 Filename 'Mean.20160830_070000.zip'
19FCB END CENTRAL HEADER 06054B50
19FCF Number of this disk 0000
19FD1 Central Dir Disk no 0000
19FD3 Entries in this disk 0005
19FD5 Total Entries 0005
19FD7 Size of Central Dir 0000015E
19FDB Offset to Central Dir 00019E6D
19FDF Comment Length 0000
Done
00000 LOCAL HEADER #1 04034B50
00004 Extract Zip Spec 14 '2.0'
00005 Extract OS 00 'MS-DOS'
00006 General Purpose Flag 0000
00008 Compression Method 0000 'Stored'
0000A Last Mod Time 491E510F 'Tue Aug 30 10:08:30 2016'
0000E CRC 218B9162
00012 Compressed Length 00005595
00016 Uncompressed Length 00005595
0001A Filename Length 0018
0001C Extra Length 0000
0001E Filename 'Mean.20160830_070000.zip'
00036 PAYLOAD
055CB LOCAL HEADER #2 04034B50
055CF Extract Zip Spec 14 '2.0'
055D0 Extract OS 00 'MS-DOS'
055D1 General Purpose Flag 0000
055D3 Compression Method 0000 'Stored'
055D5 Last Mod Time 491E5117 'Tue Aug 30 10:08:46 2016'
055D9 CRC 180124FD
055DD Compressed Length 00005972
055E1 Uncompressed Length 00005972
055E5 Filename Length 0018
055E7 Extra Length 0000
055E9 Filename 'Mean.20160830_071500.zip'
05601 PAYLOAD
0AF73 LOCAL HEADER #3 04034B50
0AF77 Extract Zip Spec 14 '2.0'
0AF78 Extract OS 00 'MS-DOS'
0AF79 General Purpose Flag 0000
0AF7B Compression Method 0000 'Stored'
0AF7D Last Mod Time 491E511D 'Tue Aug 30 10:08:58 2016'
0AF81 CRC 03A4486C
0AF85 Compressed Length 00005953
0AF89 Uncompressed Length 00005953
0AF8D Filename Length 0018
0AF8F Extra Length 0000
0AF91 Filename 'Mean.20160830_073000.zip'
0AFA9 PAYLOAD
108FC LOCAL HEADER #4 04034B50
10900 Extract Zip Spec 14 '2.0'
10901 Extract OS 00 'MS-DOS'
10902 General Purpose Flag 0000
10904 Compression Method 0000 'Stored'
10906 Last Mod Time 491E5124 'Tue Aug 30 10:09:08 2016'
1090A CRC FEE97172
1090E Compressed Length 00008818
10912 Uncompressed Length 00008818
10916 Filename Length 0018
10918 Extra Length 0000
1091A Filename 'Mean.20160830_080000.zip'
10932 PAYLOAD
1914A LOCAL HEADER #5 04034B50
1914E Extract Zip Spec 14 '2.0'
1914F Extract OS 00 'MS-DOS'
19150 General Purpose Flag 0000
19152 Compression Method 0000 'Stored'
19154 Last Mod Time 491E5129 'Tue Aug 30 10:09:18 2016'
19158 CRC 0B38337E
1915C Compressed Length 00004713
19160 Uncompressed Length 00004713
19164 Filename Length 0018
19166 Extra Length 0000
19168 Filename 'Mean.20160830_081500.zip'
19180 PAYLOAD
1D893 CENTRAL HEADER #1 02014B50
1D897 Created Zip Spec 14 '2.0'
1D898 Created OS 00 'MS-DOS'
1D899 Extract Zip Spec 14 '2.0'
1D89A Extract OS 00 'MS-DOS'
1D89B General Purpose Flag 0000
1D89D Compression Method 0000 'Stored'
1D89F Last Mod Time 491E510F 'Tue Aug 30 10:08:30 2016'
1D8A3 CRC 218B9162
1D8A7 Compressed Length 00005595
1D8AB Uncompressed Length 00005595
1D8AF Filename Length 0018
1D8B1 Extra Length 0000
1D8B3 Comment Length 0000
1D8B5 Disk Start 0000
1D8B7 Int File Attributes 0000
[Bit 0] 0 'Binary Data'
1D8B9 Ext File Attributes 00000020
[Bit 5] Archive
1D8BD Local Header Offset 00000000
1D8C1 Filename 'Mean.20160830_070000.zip'
1D8D9 CENTRAL HEADER #2 02014B50
1D8DD Created Zip Spec 14 '2.0'
1D8DE Created OS 00 'MS-DOS'
1D8DF Extract Zip Spec 14 '2.0'
1D8E0 Extract OS 00 'MS-DOS'
1D8E1 General Purpose Flag 0000
1D8E3 Compression Method 0000 'Stored'
1D8E5 Last Mod Time 491E5117 'Tue Aug 30 10:08:46 2016'
1D8E9 CRC 180124FD
1D8ED Compressed Length 00005972
1D8F1 Uncompressed Length 00005972
1D8F5 Filename Length 0018
1D8F7 Extra Length 0000
1D8F9 Comment Length 0000
1D8FB Disk Start 0000
1D8FD Int File Attributes 0000
[Bit 0] 0 'Binary Data'
1D8FF Ext File Attributes 00000020
[Bit 5] Archive
1D903 Local Header Offset 000055CB
1D907 Filename 'Mean.20160830_071500.zip'
1D91F CENTRAL HEADER #3 02014B50
1D923 Created Zip Spec 14 '2.0'
1D924 Created OS 00 'MS-DOS'
1D925 Extract Zip Spec 14 '2.0'
1D926 Extract OS 00 'MS-DOS'
1D927 General Purpose Flag 0000
1D929 Compression Method 0000 'Stored'
1D92B Last Mod Time 491E511D 'Tue Aug 30 10:08:58 2016'
1D92F CRC 03A4486C
1D933 Compressed Length 00005953
1D937 Uncompressed Length 00005953
1D93B Filename Length 0018
1D93D Extra Length 0000
1D93F Comment Length 0000
1D941 Disk Start 0000
1D943 Int File Attributes 0000
[Bit 0] 0 'Binary Data'
1D945 Ext File Attributes 00000020
[Bit 5] Archive
1D949 Local Header Offset 0000AF73
1D94D Filename 'Mean.20160830_073000.zip'
1D965 CENTRAL HEADER #4 02014B50
1D969 Created Zip Spec 14 '2.0'
1D96A Created OS 00 'MS-DOS'
1D96B Extract Zip Spec 14 '2.0'
1D96C Extract OS 00 'MS-DOS'
1D96D General Purpose Flag 0000
1D96F Compression Method 0000 'Stored'
1D971 Last Mod Time 491E5124 'Tue Aug 30 10:09:08 2016'
1D975 CRC FEE97172
1D979 Compressed Length 00008818
1D97D Uncompressed Length 00008818
1D981 Filename Length 0018
1D983 Extra Length 0000
1D985 Comment Length 0000
1D987 Disk Start 0000
1D989 Int File Attributes 0000
[Bit 0] 0 'Binary Data'
1D98B Ext File Attributes 00000020
[Bit 5] Archive
1D98F Local Header Offset 000108FC
1D993 Filename 'Mean.20160830_080000.zip'
1D9AB CENTRAL HEADER #5 02014B50
1D9AF Created Zip Spec 14 '2.0'
1D9B0 Created OS 00 'MS-DOS'
1D9B1 Extract Zip Spec 14 '2.0'
1D9B2 Extract OS 00 'MS-DOS'
1D9B3 General Purpose Flag 0000
1D9B5 Compression Method 0000 'Stored'
1D9B7 Last Mod Time 491E5129 'Tue Aug 30 10:09:18 2016'
1D9BB CRC 0B38337E
1D9BF Compressed Length 00004713
1D9C3 Uncompressed Length 00004713
1D9C7 Filename Length 0018
1D9C9 Extra Length 0000
1D9CB Comment Length 0000
1D9CD Disk Start 0000
1D9CF Int File Attributes 0000
[Bit 0] 0 'Binary Data'
1D9D1 Ext File Attributes 00000020
[Bit 5] Archive
1D9D5 Local Header Offset 0001914A
1D9D9 Filename 'Mean.20160830_081500.zip'
1D9F1 END CENTRAL HEADER 06054B50
1D9F5 Number of this disk 0000
1D9F7 Central Dir Disk no 0000
1D9F9 Entries in this disk 0005
1D9FB Total Entries 0005
1D9FD Size of Central Dir 0000015E
1DA01 Offset to Central Dir 0001D893
1DA05 Comment Length 0000
Done
public void addToZip(File zipFile, File... filesToAdd) {
final byte[] buffer = new byte[1024];
FileOutputStream fos = new FileOutputStream(zipFile.getAbsoluteFile());
ZipOutputStream zos = new ZipOutputStream(fos);
for (File fileToAdd : filesToAdd) {
ZipEntry entry = new ZipEntry(fileToAdd.getName());
try {
zos.putNextEntry(entry);
try (FileInputStream in = new FileInputStream(input.getAbsoluteFile())) {
int len;
while ((len = in.read(buffer)) > 0) {
zos.write(buffer, 0, len);
}
}
zos.closeEntry();
}
}
try {
zos.finish();
zos.close();
} catch (IOException ex) {
LOGGER.log(Level.SEVERE, null, ex);
}
}
zipEntry.setMethod(ZipEntry.DEFLATED); was not enough to have my files accepted by the legacy program.STORED entries to DEFLATED ones, here is how you can create
STORED entries it is mandatory to also set (un-)compressed size and CRC for each entry. This is how you can do it (unfortunately I am reading each nested ZIP file twice, once for calculating the CRC and once for copying its contents to the ZIP output stream):package de.scrum_master.app;
import java.io.File;
import java.io.IOException;
import java.util.SortedMap;
import java.util.TreeMap;
public class Application {
public static void main(String[] args) throws IOException {
SortedMap<File, File[]> fileMappings = new TreeMap<>();
fileMappings.put(
new File("books.zip"),
new File[] { new File("books.xml") }
);
fileMappings.put(
new File("cds.zip"),
new File[] { new File("cds.xml") }
);
fileMappings.put(
new File("clothes.zip"),
new File[] { new File("clothes.xml") }
);
ZipTool zipTool = new ZipTool();
for (File zipFile : fileMappings.keySet())
zipTool.addToZip(zipFile, fileMappings.get(zipFile));
zipTool.addToZip(
new File("archive.zip"),
new File[] { new File("books.zip"), new File("cds.zip"), new File("clothes.zip") }
);
}
}
package de.scrum_master.app;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.CRC32;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
public class ZipTool {
public void addToZip(File zipFile, File... filesToAdd) throws IOException {
try (
FileOutputStream fos = new FileOutputStream(zipFile.getAbsoluteFile());
ZipOutputStream zos = new ZipOutputStream(fos)
) {
final byte[] buffer = new byte[1024];
for (File fileToAdd : filesToAdd) {
ZipEntry entry = new ZipEntry(fileToAdd.getName());
if (fileToAdd.getName().endsWith(".zip")) {
entry.setMethod(ZipEntry.STORED);
long fileSize = fileToAdd.length();
entry.setSize(fileSize);
entry.setCompressedSize(fileSize);
CRC32 crc32 = new CRC32();
try (FileInputStream in = new FileInputStream(fileToAdd.getAbsoluteFile())) {
int len;
while ((len = in.read(buffer)) > 0) {
crc32.update(buffer, 0, len);
}
}
entry.setCrc(crc32.getValue());
}
zos.putNextEntry(entry);
try (FileInputStream in = new FileInputStream(fileToAdd.getAbsoluteFile())) {
int len;
while ((len = in.read(buffer)) > 0) {
zos.write(buffer, 0, len);
}
}
zos.closeEntry();
}
}
}
}
