Using java to realize HTTP multithreading breakpoint download file (2)

• Java

I don't think many people can't use the download tool. Some time ago, it was boring. I spent some time writing a simple HTTP multi-threaded download program in Java. It was written purely because of boredom. It only realized a few simple functions and didn't write an interface. Today is also a boring day. I used it to write an article and teach others. I think it's good to give a round of applause, Don't spray if it's not good, thank you! The function of the HTTP download tool I implemented is very simple, that is, a multi thread and a breakpoint recovery. Of course, download is essential. Then, sort out the things to do first: 1. Connect to the resource server, obtain resource information and create files. 2. Split resources, multi-threaded download. 3. Breakpoint recovery function. 4. Download rate statistics. That's about all. The first thing to do is to connect resources and obtain resource information. I use the urlconnection provided by javase for resource connection, The approximate code is as follows:

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