java -jar <jar文件名> [选项]

java -jar app.jar --spring.config.name=config

java -jar app.jar --spring.config.name=/path/to/config

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

public class ConfigExample {

    public static void main(String[] args) {

        // 默认配置文件名
        String configFileName = "config.properties";

        // 检查命令行参数，如果指定了配置文件名，则使用指定的配置文件
        if (args.length > 0) {
            configFileName = args[0];
        }

        // 读取配置文件
        Properties props = new Properties();
        try {
            FileInputStream fis = new FileInputStream(configFileName);
            props.load(fis);
            fis.close();
        } catch (IOException e) {
            System.err.println("Error reading config file: " + e.getMessage());
            System.exit(1);
        }

        // 输出配置文件中的属性值
        System.out.println("Config properties:");
        for (String key : props.stringPropertyNames()) {
            System.out.println(key + " = " + props.getProperty(key));
        }
    }
}

app.name = MyApp
app.version = 1.0
app.author = John Doe

javac ConfigExample.java

jar cvfm app.jar manifest.txt ConfigExample.class

Main-Class: ConfigExample

java -jar app.jar --spring.config.name=config

Config properties:
app.name = MyApp
app.version = 1.0
app.author = John Doe