I see many suggestions to use the jchm jar to do this. However I don't see any code which shows how to read the chm file using the jchm jar.
I used hh.exe -decompile [destination_folder] chmfile.chm to decompile the .chm into its underlying .htm files. I am now writing java code to parse all these .htm to create a tree structure to store the complex structure of hyperlinks in the .chm file.
Related
I have >400 JPG files and a JSON file for each which contains the image tags, description and title. I've found this command
exiftool -json=picture.json picture.jpg
But I don't want to run this for each and every file.
How can I run this command for the folder containing the JPGs and JSONs or is there another way I can batch process these?
Each JSON file has the same name as it's JPG counterpart so it's easy to identify which files match up to each other.
Assuming your JPGs and JSONs have the same filename, but different extesion(e.g. picture001.jpg has an associated picture001.json,etc.), a batch for loop might work.
Assuming you've already cd-ed into the folder and the files aren't nested in folders, something like this should work
( for jpg in *.jpg; do exiftool -json=${jpg/\.jpg/.json} $jpg; done )
Note that this isn't tested. I recommend making a copy of your folder and testing there beforehand to make sure you don't irreversibly damage them.
I've also noticed you're using the java tag. I had to work with EXIF data in Java a while back (on Android then) and I used the JHeader library. If you want to roll your own little java command line tool, you should be able to use Java's IO classes to traverse your directory and files and the JHeader library to modify the EXIF data.
Problem:
I am looking for a way to generate a SPSS file using PL/ SQL. Currently, I am able to generate a .csv file with roughly 300-400 columns. I have tried to google and didn't have any luck in finding a way to generate SPSS file using PL/SQL.
Expected Solution:
Either generate a SPSS file directly OR use some kind of java class like one this program SPSS Writer uses to convert the .csv file into SPSS. My understanding is that we would need to provide the metadata file in order to convert the csv file into SPSS.
Any suggestions would be much appreciated.
If you are trying to generate a sav file without SPSS you can write a program using the SPSS io modules available free via the SPSS community website.
I'm making two Java applications one to collect data, another to use it. The one collecting will be importing a file from the other which will include data and images and will be decrypted.
I'm unsure what filetype to use. So far all of the data is in XML and works great but I need the images and was hoping not to have to rely on giving all the images in a folder with a path reference.
Ideas?
well, I think that the best way is to create your own format (.myformat or .data). This file will be in fact a Zip file that contains your XML file and images.
There is no perfect example writen in java as far as I know. However, here are some examples :
Not in java
The best example is, as #Bolo said, the odt format. Indeed, OpenOffice writes the doc in an xml file, and the images too. All that is wrapped in an odt file.
The .exe file is an other example. The C files and the resources are put in a single file. try to open it with 7-zip, you'll see.
The Skyrim plugins are .esp file that contain the dds, the scripts, the niffs (textures)...
In java
The minecraft texture packs are a zip file that contains a .mcmeta file (the infos) and the textures (.png)
Jar files are like exe.
If both programs are in java you could also go with serialization, which is basically saving an object as a file (suffix will be .ser I think) and then being able to retrieve it. You should google it, even if it won't help right now it is quite good to know about it.
I'd suggest using JSON. Gson is a decent library.
You can embed images as byte arrays.
Save the serialized string in a file with a preferred extension, read it from the second application, de-serialize, and reconstruct images.
You can convert binary image data to text with Base64 encoding and this way you can embed your images in XML. [1]: http://en.wikipedia.org/wiki/Base64
I'm working on a java project that requires me to access a file within multiple embedded zip files and directories.
For example, archive1.zip/archive1/archive2.zip/archive2/directory1/file_that_I_need.txt.
It would be a lot easier if when each zip file was extracted, it would immediately list its contents but instead there's a folder inside that contains all the contents.
The examples I found online deal with zip files that, when extracted, contain the files they need to access but I can't find any that deal with accessing files within a directory in a zip file. Any advice on this would be great.
Thanks!
Given the prohibition against creating new files, you're pretty much stuck with ZipInputStream. When you find the ZipEntry that corresponds to the embedded archive, you then read its stream to find the actual file. You can proceed recursively through as many levels of archives as you want.
This works OK if you're looking to process a single file. However, re-reading the archives for multiple files can be expensive. A better solution is to at least open the outer archive as a ZipFile, which memory-maps the actual file.
If you can then extract the contained archives into a temporary directory and open them as ZipFiles as well, you'll probably see a big speed increase (as long as you're pulling multiple files from each embedded archive).
You might also look at http://truezip.java.net/ I've used an older version of it, and its quite a bit more powerful than the support that's built into Java. I think there is also an Apache Commons library for reading files from within nested archive structures.
I'm facing a problem that, we have a .zip file that contains some text files. Now I'm using java to access that files. If it is not in the .zip file I can read and print on my console easily using FileInputStream.
But how to read a file from .zip file? I use J2SE only..
You should try a ZipInputStream. The interface is a little obtuse, but you can use getNextEntry() to iterate through the items in the .zip file.
As a side note, the Java class-loader does exactly this to load classes from .jar files without extracting them first.
Everything you need is in ZipFile: https://docs.oracle.com/javase/7/docs/api/java/util/zip/ZipFile.html. Google for examples on the web, and if you have specific problems then come back to SO for help.
(The link will eventually break; when it does simply websearch java zipfile.)