Apache BSF API's entry guide and tutorial

Apache BSF (Bean Scripting Framework) is an open source Java script framework that provides a unified interface that allows Java programs to interact with various script languages.This article will introduce the entry guide and tutorial of Apache BSF API, and provide some Java code examples to help beginners get started quickly. Installation of BSF: 1. First, download the latest version of the BSF library from Apache BSF's official website (https://commons.apache.org/proper/commons-bsf/). 2. Unzip the downloaded file and add BSF.JAR to the dependence of the project. BSF API Introduction Guide: Here are some basic BSF API concepts and usage: 1. Create a script engine: import org.apache.bsf.*; import org.apache.bsf.util.*; // Get the script engine instance BSFEngine engine = BSFManager.getManager().loadScriptingEngine("javascript"); 2. Register the Java object to the script engine: import org.apache.bsf.*; import org.apache.bsf.util.*; Object obj = new MyJavaObject(); BSFManager.getManager().registerBean("myObject", obj); 3. Execute script: import org.apache.bsf.*; import org.apache.bsf.util.*; String script = "var result = myObject.doSomething(5);"; engine.exec("scriptName", 0, 0, script); 4. Get the value of the variable from the script: import org.apache.bsf.*; import org.apache.bsf.util.*; Object result = engine.eval("result"); 5. Call the function in the script: import org.apache.bsf.*; import org.apache.bsf.util.*; engine.exec("scriptName", 0, 0, "function myFunction() { return 10; }"); Object result = engine.call("myFunction", new Object[]{}); 6. Clear script engine: import org.apache.bsf.*; import org.apache.bsf.util.*; BSFManager.getManager().unloadScriptingEngine("javascript"); As shown above, this is a basic BSF API entry guide, which can help you start using the Apache BSF framework. Please note that you can use other script language, such as JavaScript, Python, Ruby, etc., just pass the corresponding script engine name to the method of `LoadScriptingEngine`. I hope this article can help you get started quickly and understand the basic use of Apache BSF API.For more detailed information and more advanced usage, please refer to the official documentation.