EPerl: Perl, C++, and Java

摘要

Perl is a powerful programming language supported by a large and active developer community. As a result, thousands of Perl modules and scripts have been developed, many of which are archived at the Comprehensive Perl Archive Network (CPAN) (http://www.cpan.org/). With an extensive repository of code available for reuse, opportunities to utilize this code clearly abound. One way to reuse existing Perl code is to embed it in other languages. For example, you might be in the midst of developing a Java application and need to scrape some data off the Web. Rather than writing your own custom Java (or C++) web scraping routine, you can instead reach for one of several Perl modules freely available for web-page scraping. The small amount of Perl code required for invocation would be embedded in the source of a Java method in the same fashion that a SQL statement is embedded using the standard JDBC call-level interface. The results are automatically retrieved back into the Java runtime environment for manipulation and possible display.