[英]How to use java.util.zip for epub
I have to edit the html files of epubs programmatically so what I did was to unzip the .epub and create a parser to make the necessary edits for the html files. 我必须以编程方式编辑epubs的html文件,所以我要做的是解压缩.epub并创建解析器以对html文件进行必要的编辑。 However, when I convert them back into an .epub using my code, EpubChecker shows that:
但是,当我使用代码将它们转换回.epub时,EpubChecker显示:
Error: Required META-INF/container.xml resource is missing
When I uncompressed my edited .epub, the container.xml is present and is not missing. 当我解压缩编辑的.epub时,container.xml存在并且不丢失。
I understand that the mimetype and META-INF has to be zipped first. 我知道必须先压缩mimetype和META-INF。 Here is my code to convert the files back to epub:
这是将文件转换回epub的代码:
FileOutputStream fos = new FileOutputStream(zipFile);
ZipOutputStream zos = new ZipOutputStream(fos);
System.out.println("Output to Zip : " + zipFile);
writeMimeType(zos);
ZipEntry container = new ZipEntry("META-INF\\container.xml");
zos.putNextEntry(container);
FileInputStream inMime2 = new FileInputStream(SOURCE_FOLDER + File.separator + "META-INF\\container.xml");
int len2;
while((len2 = inMime2.read(buffer)) > 0){
zos.write(buffer, 0, len2);
}
inMime2.close();
for(String file : this.fileList){
if(!file.toString().equals("mimetype") && !file.toString().equals("META-INF\\container.xml")){
System.out.println("File Added : " + file);
ZipEntry ze= new ZipEntry(file);
zos.putNextEntry(ze);
FileInputStream in =
new FileInputStream(SOURCE_FOLDER + File.separator + file);
int len;
while ((len = in.read(buffer)) > 0) {
zos.write(buffer, 0, len);
}
in.close();
}
}
zos.closeEntry();
zos.close();
When I manually zip the directory using WinRar, no errors are seen and it works properly. 当我使用WinRar手动压缩目录时,没有看到错误,并且可以正常工作。 I don't know what I am doing wrong.
我不知道我在做什么错。 Can somebody please help me?Thank you.
有人可以帮我吗?谢谢。
Looks like you're on Windows, so your FileInputStream(SOURCE_FOLDER + File.separator + "META-INF\\\\container.xml");
看起来就像您在Windows上,因此您的
FileInputStream(SOURCE_FOLDER + File.separator + "META-INF\\\\container.xml");
statement is correct for the OS, but I'd guess you need to change the other 2 strings to use the forward slash for the zipentry path. 声明对于操作系统是正确的,但是我想您需要更改其他2个字符串以对zipentry路径使用正斜杠。
ZipEntry container = new ZipEntry("META-INF\\container.xml");
try instead as 尝试作为
ZipEntry container = new ZipEntry("META-INF/container.xml");
and change 并改变
if(!file.toString().equals("mimetype") && !file.toString().equals("META-INF\\container.xml")){
to 至
if(!file.toString().equals("mimetype") && !file.toString().equals("META-INF/container.xml")){
accordingly. 相应地。
You may need to adjust your other ZipEntry
's as well. 您可能还需要调整其他
ZipEntry
。 From the ZIP spec (section "4.4.17 file name"): 从ZIP规范 (“ 4.4.17文件名”部分):
All slashes MUST be forward slashes '/' as opposed to backwards slashes '\\'
所有斜杠必须是正斜杠“ /”,而不是反斜杠“ \\”
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