java - 有没有更好的方法从多个字符串数组中找到任何字符串

Question

在下面的例子中，有一些预定义的字符串数组，我在下面的例子中提到过，现在我的要求是如果每个数组中的 boName prensents 我需要调用为特定自定义文件定义的方法。有没有其他方法可以避免多个 for 循环。

public class MyClass {

    private static final String[] OTHER_CUSTOM_FIELD_RELATED_BO_NAME = { "A", "B", "C", "D", "E", "F", "G", "H" };
    private static final String[] TRANSACTION_CUSTOM_FIELD_RELATED_BO_NAME = { "A", "AB", "CD", "DE", "EG" };
    private static final String[] CRM_CUSTOM_FIELD_RELATED_BO_NAME = { "I", "J", "K", "L", "M" };
    private static final String[] ITEM_CUSTOM_FIELD_RELATED_BO_NAME = { "N", "O", "P", "Q" };
    private static final String[] ENTITY_CUSTOM_FIELD_RELATED_BO_NAME = { "AN", "ZY", "X", "P" };

    public static List<String> BusinessObjectDescribe(String boName) {
        List<String> fields = new ArrayList<String>();
        if (boName != null && !boName.isEmpty()) {
            for (String string : OTHER_CUSTOM_FIELD_RELATED_BO_NAME) {
                if (boName.equals(string)) {
                    fields.addAll(getOtherCustomFields());
                    break;
                }
            }

            for (String string : TRANSACTION_CUSTOM_FIELD_RELATED_BO_NAME) {
                if (boName.equals(string)) {
                    fields.addAll(getTransactionCustomFields());
                    break;
                }
            }

            for (String string : CRM_CUSTOM_FIELD_RELATED_BO_NAME) {
                if (boName.equals(string)) {
                    fields.addAll(getCRMCustomFields());
                    break;
                }
            }

            for (String string : ITEM_CUSTOM_FIELD_RELATED_BO_NAME) {
                if (boName.equals(string)) {
                    fields.addAll(getITEMCustomFields());
                    break;
                }
            }

            for (String string : ENTITY_CUSTOM_FIELD_RELATED_BO_NAME) {
                if (boName.equals(string)) {
                    fields.addAll(getEntityCustomFields());
                    break;
                }
            }

        }

        return fields;

    }

}

Answer 1

如果您使用的是 Java8，则可以利用函数式接口(interface)。只需创建新函数，将您的数组作为第一个参数，将供应商函数作为第二个。在供应商中，您可以传递有关添加的逻辑。而且您需要多次调用该函数而不是重复代码。