The comparison involves a number of criteria, including features supported, commercial aspects with regard to the library provider, and file transfer performance. To help decision-makers choose a library that suits their needs, this article compares and evaluates these libraries. Therefore, selecting the right library with regard to specific needs can prove difficult. Indeed, all these libraries implement different features, at various prices, with diverse levels of quality and license terms. This list is quite long, and comparing the libraries is not straightforward. Enterprise Distributed Technologies' FTPj.Many Java FTP libraries exist and are available on the Internet. To get complete RFC959-compliant support and convenient methods, Java developers must turn to the third-party libraries available on the market. ![]() In addition, when using the JDK's FTP support, FTP server responses are returned as raw strings instead of convenient Java objects. Thus, when RFC959-compliance is needed, the JDK proves unsatisfying. For example, the JDK does not allow the creation of directories on the server or permit the FTP connection to remain open between two file transfers. As discussed in my previous JavaWorld article " Java FTP Client Libraries Reviewed" (April 2003), FTP support in the JDK does not fully implement the FTP specification (Request for Comments 959).
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