枚举工具类

枚举工具类

package msdev.test.util;

import java.lang.reflect.Field;
import java.util.LinkedHashMap;
import java.util.Map;

public class EnumUtils {

    public static <T extends Enum<T>> Map<Integer, String> getEnumMap(Class<T> enumClass) {
        Map<Integer, String> enumMap = new LinkedHashMap<>();

        try {
            Field[] fields = enumClass.getDeclaredFields();

            for (Field field : fields) {
                if (field.isEnumConstant()) {
                    T enumValue = Enum.valueOf(enumClass, field.getName());
                    int code = getCode(enumValue);
                    String description = getDescription(enumValue);
                    enumMap.put(code, description);
                }
            }
        } catch (Exception e) {
            e.printStackTrace(); // 处理异常，例如 NoSuchFieldException 或 SecurityException
        }

        return enumMap;
    }

    private static <T extends Enum<T>> int getCode(T enumValue) {
        try {
            Field codeField = enumValue.getClass().getDeclaredField("code");
            codeField.setAccessible(true);
            return (int) codeField.get(enumValue);
        } catch (Exception e) {
            e.printStackTrace();
            return -1; // 处理异常
        }
    }

    private static <T extends Enum<T>> String getDescription(T enumValue) {
        try {
            Field descriptionField = enumValue.getClass().getDeclaredField("description");
            descriptionField.setAccessible(true);
            return (String) descriptionField.get(enumValue);
        } catch (Exception e) {
            e.printStackTrace();
            return ""; // 处理异常
        }
    }

    public static void main(String[] args) {
        Map<Integer, String> enumMap = getEnumMap(MyEnum.class);
        System.out.println(enumMap);
    }

    // 示例枚举类
    private enum MyEnum {
        VALUE1(1, "Description 1"),
        VALUE2(2, "Description 2"),
        VALUE3(3, "Description 3");

        private final int code;
        private final String description;

        MyEnum(int code, String description) {
            this.code = code;
            this.description = description;
        }
    }
}