How to Invoke JAR Methods on Linux

There are two ways to invoke a method in a jar file in a Linux system: using the Java command line tool or invoking through Java code.

1. Call the methods within a jar file using Java command line tools.

java -cp path/to/your.jar com.yourpackage.YourClass

The -cp parameter is used to specify the path of the jar file, with com.yourpackage.YourClass being the name of the class to be called.

1. Invoke methods in a jar file using Java code.

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

public class Main {
    public static void main(String[] args) {
        try {
            Process proc = Runtime.getRuntime().exec("java -jar path/to/your.jar");
            InputStream in = proc.getInputStream();
            
            // 读取jar包里的输出
            int c;
            while ((c = in.read()) != -1) {
                System.out.print((char) c);
            }
            in.close();
            
            // 获取调用jar包的返回值
            int exitVal = proc.waitFor();
            System.out.println("\nExited with error code " + exitVal);
        } catch (IOException | InterruptedException e) {
            e.printStackTrace();
        }
    }
}

This code snippet will start a new process to run the jar file and read its output. You can modify the code as needed to meet your requirements.