Spring Shell的SingleItemSelector在Windows控制台失效，Ubuntu终端正常

数据老陈

2026-7-8

Spring Shell SingleItemSelector在Windows控制台异常问题

使用Spring Shell的SingleItemSelector组件实现选项列表等待用户选择功能，该功能在Ubuntu终端可正常运行，但在Windows控制台中不会等待用户操作，直接获取null值作为输入。推测原因是Windows控制台在用户按下回车执行命令后直接读取了输入。

代码示例

@ShellMethod(key = "single", value = "Single selector")
public String singleSelector() {
    SelectorItem<String> i1 = SelectorItem.of("key1", "value1");
    SelectorItem<String> i2 = SelectorItem.of("key2", "value2");
    List<SelectorItem<String>> items = Arrays.asList(i1, i2);
    SingleItemSelector<String, SelectorItem<String>> component = new SingleItemSelector<>(getTerminal(),
            items, "testSimple", null);
    component.setResourceLoader(getResourceLoader());
    component.setTemplateExecutor(getTemplateExecutor());
    SingleItemSelector.SingleItemSelectorContext<String, SelectorItem<String>> context = component
            .run(SingleItemSelector.SingleItemSelectorContext.empty());
    String result = context.getResultItem().flatMap(si -> Optional.ofNullable(si.getItem())).get();
    return "You have selected: " + result;
}