9/15/2023 0 Comments Java download file from url![]() Furthermore, we will be able to keep our Java application leaner if we can download files without. Even though there are many Java external libraries to help us do so, using the facilities in the Java standard runtime installation is not difficult. The following link describes the use of multithreaded download and Range request header.įor more information, click import java.io. Apart from uploading a file to a HTTP server endpoint, another common task for a Java HTTP client is to download a file from a HTTP server. Next, in order to be able to download large files we wrapped the input stream into a BufferedInputStream. Then, we opened an InputStream from the file using openStream method. Key point: the parent class of HttpURLConnection has a very important setRequestProperty() method. Code language: Java (java) At first, we created an URL instance by specifying URL of the file or resource we want to download. ![]() ![]() Httpurlconnection, and the online API reference document This project needs to understand the specific usage of java.io.RandomAccessFile,. Start the thread, each thread is responsible for downloading a part of the file, and then the random access stream automatically splices the file and synthesizes it Random access streams can read and write files at the same time under multithreadingģ. RandomAccessFile class occupies the storage space. URL requests to get the size of the download file and calculate the starting location of each thread DownloadĢ.
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