The design and technical principles of the JCLI framework in the Java class library

In the Java class library, the JCLI framework is a tool to build a command line interface.It follows some design and technical principles to provide simple, flexible and scalable command line solutions. 1. Single responsibilities principle: JCli framework follows the principles of single responsibilities by decomposing different functions into reused and independent components.It provides a clear API that allows developers to pay attention to business logic only without the need for command line calls and parameter analysis without concern. 2. Scalability: The JCLI framework allows developers to easily expand and customize command line interfaces.It provides a plug -in mechanism that can add new commands, actuators and parameter parsers.This allows developers to add new functions according to specific needs without having to modify the existing code. 3. Configuration driver: The JCLI framework uses configuration files to define commands and parameters.Developers can use the configuration files of XML, JSON or other formats to describe the structure and behavior of the command line interface.This configuration -driven method enables the configuration and code to separate, and improves maintenance and flexibility. 4. Note support: The JCLI framework supports the use of annotations to simplify the definition of commands and parameters.Developers can use annotations to mark commands and parameters, and specify their names, descriptions, default values and other attributes.This method makes the code more concise and readable, and reduces the complexity of manual parsing parameters. The following is an example code that demonstrates how to use the JCli framework to create a simple command line application: import net.sf.jcli.*; public class MyCLIApp { @SuppressWarnings("unchecked") public static void main(String[] args) { // Create command line tone CLIManager cliManager = new CLIManager(); // Create an command line parser CLICommandParser commandParser = new CLICommandParser(cliManager); // Add commands and parameters CLICommand command = new CLICommand("sayhello", "Say hello to someone"); commandParser.addCommand(command); CLIArgument<String> nameArg = new CLIArgument<>("name", "Name of the person", true); command.addArgument(nameArg); // Analyze the command line parameters CommandLine line = commandParser.parse(args); // Excuting an order if (line.hasOption(command)) { String name = line.getValue(nameArg); System.out.println("Hello, " + name + "!"); } } } In the above code, we first created a command line scheduler and an command line parser.Then, we defined an command called "Sayhello" and added it to the parser.Next, we define a parameter called "name" and associate it with the command.Finally, we execute the corresponding logic based on the command line parameters of the parsing. Using the JCLI framework, developers can easily build flexible and scalable command line interfaces to meet different needs.By following the design and technical principles, the JCLI framework provides a simple and elegant way to handle command line operations.