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How do you download a file using Java?

Categories: Download

There are multiple ways of downloading a record from a URL in Java. This post gives an outline of a portion of the accessible choices to achieve this.

1. Utilizing FileChannel.transferFrom() technique

java.nio.channels.FileChannel class in Java gives a few techniques to perusing, composing, planning, and controlling a record. It is transferFrom() technique moves bytes into this channel's record from the given lucid byte channel. It acknowledges three boundaries - the source channel, the situation inside the record at which the exchange is to start, and the greatest number of bytes to be moved.

2. Utilizing Files.copy() technique

From Java 7 forward, we can utilize the java.nio.file.Files.copy() technique to duplicate all bytes from an information stream to a record. It acknowledges the information stream to peruse from and the way to the document. Furthermore, we can indicate how the duplicating ought to be finished.

3. Plain Java

In plain Java, we can peruse the record byte by byte from the information stream and compose the bytes to a document yield stream.

4. Utilizing Apache Hall IO

We can likewise utilize Apache Hall IO library, whose FileUtils class offers helpful document control utilities. FileUtils' copyURLToFile() technique can be utilized to duplicate bytes from the URL source to the predetermined record objective. It is prescribed to utilize its over-burden rendition with association and read break boundaries.

How do you download a file using Java?