什么是.lck文件，为什么不能用缓冲读取器读取它？

Question

I'm trying to use crawler4j to crawl websites. I was able to follow the instructions on the crawler4j website. When it is done it creates a folder with two different .lck files, one .jdb file and one .info.0 file.

I tried to read in the file using the code that I provided in this answer to read in the file but it keeps failing. I've used the same function to read text files before, so I know the code works.

I also found someone else that asked the same question a few months ago. They never got an answer.

Why can't I use my code to open and read these .lck files to memory?

Answer 1

Crawler4j uses BerkeleyDB to store crawl informations. See here in the source.

From the command line you can use DB utils to acces the data. Already covered in SO here .

If you want to access the data in your Java code, you simply import BerkeleyDB library (Maven instruction there) and follow the tutorial on how to open the DB .