Java: picocli: 如何在不命名的情况下为命令提供参数？

Question

是否可以在不明确命名 picocli 中的参数的情况下向 @CommandLine.Command 提供参数？

例如，可以调用以下命令：open n 1。但是，我希望能够以 open 1.

的形式调用命令

@CommandLine.Command(name = "open",
    mixinStandardHelpOptions = true,
    version = "1.0",
    description = "Open note")
@Getter
@ToString
public class OpenCommand implements Runnable {
    @CommandLine.ParentCommand TopLevelCommand parent;


    @CommandLine.Option(names = {"number", "n"}, description = "Number of note to open")
    private Integer number;


    public void run() {

        System.out.println(String.format("Number of note that will be opened: " + number));
    }
}

Answer 1

Picocli 为 positional parameters, in addition to the @Option annotation, which is for named parameters 提供 @Parameters 注释。

如果您对数字使用 @Parameters 注释而不是 @Option(names = "n")，则最终用户可以调用命令作为 open 1。

这是一个相当小的变化，生成的代码可能如下所示：

@CommandLine.Command(name = "open",
    mixinStandardHelpOptions = true,
    version = "1.0",
    description = "Open note")
@Getter
@ToString
public class OpenCommand implements Runnable {
    @CommandLine.ParentCommand TopLevelCommand parent;

    @CommandLine.Parameters(description = "Number of notes to open")
    private Integer number;

    public void run() {
        System.out.printf("Number of notes that will be opened: %s%n", number);
    }
}

Java: picocli: 如何在不命名的情况下为命令提供参数？

Java: picocli: How to provide argument to command without naming it?

java

command-line-interface

picocli