Jopt Simple framework and CLI command line analysis
Analysis of JOPT SIMPLE framework and CLI command line
Brief introduction
Jopt Simple is an open source Java library that provides a simple and powerful way to analyze the command line parameters for Java developers.CLI (command line interface) is a common user interface, which is often used in interacting with computer programs.By using the Jopt Simple framework, developers can easily process and analyze the CLI command line parameters to meet their application needs.
The function of JOPT SIMPLE framework
Jopt Simple framework has the following powerful functions:
1. Simple API: Jopt Simple provides a simple and easy -to -use API, allowing developers to easily handle and analyze the command line parameters.
2. Process multiple types of parameters: framework supports analysis of multiple types of command line parameters, such as string, integer, Boolean value, etc.Developers can define custom parameter types according to their needs.
3. Support command line options (Options): JOPT SIMPLE can process and analyze various command line options, such as the abbreviation form and full name form of options, as well as options with parameters and non -parameters.
4. Parameter verification: Developers can use the Jopt Simple framework to verify the effectiveness of the command line parameters.If the parameter does not meet the expected format or range, the framework will provide appropriate error prompts.
Use the JOPT SIMPLE framework to parse the example code of the CLI command line parameters:
Below is a simple example, showing how to use the job simple framework to analyze the command line parameters.Suppose our application needs to analyze a command line parameter containing the file path and recursive logo.
import joptsimple.OptionParser;
import joptsimple.OptionSet;
public class CommandLineParser {
public static void main(String[] args) {
OptionParser parser = new OptionParser();
parser.accepts("file").withRequiredArg().ofType(String.class);
parser.accepts("recursive");
OptionSet options = parser.parse(args);
if (options.has("file")) {
String filePath = (String) options.valueOf("file");
System.out.println ("File path:" + filepath);
}
if (options.has("recursive")) {
System.out.println ("The recursive sign has been enabled");
}
}
}
In the above example, we first created an `OptionParser` object to define and analyze the command line options.The `Accepts` method is used to define the command line options.
After parsing the parameters, we can use the `has` method to determine whether the command line options exist.
Summarize
Jopt Simple is a convenient Java library that enables developers to easily handle and analyze the CLI command line parameters.It provides a simple API and rich features, including processing multiple types of parameters, support command line options and parameter verification.By using the Jopt Simple framework, developers can develop command line applications more efficiently.
