Java 获取Enum枚举中的值，以列表方式返回

有时候，有一些下拉选择器的数据项，我们采取了枚举的方式简单记录，但是里面的东西多，前端不想写死，需要提供接口返回。

示例：

枚举

/**
 * @Author: JCccc
 * @Description:
 * @Date: Create in 10:51 2021/1/25
 */
public enum EducateStatusEnum {

    /**
     * 学生 学业状态
     */
    IN_STUDYING((short) 1, "在读"),
    UNDERGRADUATE((short) 2, "肆业"),
    SUSPENDED((short) 3, "休学"),
    DROPPED((short) 4, "辍学"),
    QUITED((short) 5, "退学"),
    GRADUATED((short) 6, "已毕业"),


    ;
    public short code;
    public String name;

    EducateStatusEnum(Short code, String name) {
        this.code = code;
        this.name = name;
    }

    public int getCode() {
        return this.code;
    }

    public String getName() {
        return this.name;
    }

    public static EducateStatusEnum findEnumByCode(Integer code) {

        for (EducateStatusEnum statusEnum : EducateStatusEnum.values()) {
            if (statusEnum.getCode() == code) {
                return statusEnum;
            }

        }
        throw new IllegalArgumentException("code is not support");

    }

    public static EducateStatusEnum findEnumByName(String name) {
        for (EducateStatusEnum statusEnum : EducateStatusEnum.values()) {
            if (statusEnum.getName().equals(name)) {
                return statusEnum;
            }

        }
        throw new IllegalArgumentException("name is not support");
    }


}      

工具类：

ps ：如果不想引入jar，自己写对应的判空逻辑即可。

import org.apache.commons.lang3.StringUtils;

import org.springframework.util.CollectionUtils;

/**
 * @Author: JCccc
 * @Description: 将枚举转换为list类型
 * @Date: Create in 19:03 2021/1/26
 */

public class EnumListUtil {

    private static String ENUM_CLASSPATH="java.lang.Enum";

    public static List<Map<String, Object>> enumToListMap(Class<?> enumClass) {
        List<Map<String, Object>> resultList= new ArrayList<>();
        if (!ENUM_CLASSPATH.equals(enumClass.getSuperclass().getCanonicalName())) {
            return resultList;
        }
        // 获取所有public方法
        Method[] methods = enumClass.getMethods();
        List<Field> fieldList = new ArrayList<>();
        //1.通过get方法提取字段，避免get作为自定义方法的开头，建议使用 ‘find’或其余命名
        Arrays.stream(methods)
                .map(Method::getName)
                .filter(
                        methodName -> methodName.startsWith("get") && !"getDeclaringClass".equals(methodName) && !"getClass".equals(methodName)
                ).forEachOrdered(methodName -> {
                    try {
                        Field field = enumClass.getDeclaredField(StringUtils.uncapitalize(methodName.substring(3)));
                        if (null != field) {
                            fieldList.add(field);
                        }
                    } catch (NoSuchFieldException | SecurityException e) {
                        e.printStackTrace();
                    }
        });

        //2.将字段作为key，逐一把枚举值作为value 存入list
        if (CollectionUtils.isEmpty(fieldList)) {
            return resultList;
        }

        Enum<?>[] enums = (Enum[]) enumClass.getEnumConstants();
        for (Enum<?> anEnum : enums) {
            Map<String, Object> map = new HashMap<>(fieldList.size());
            for (Field field : fieldList) {
                field.setAccessible(true);
                try {
                    // 向map集合添加字段名称 和 字段值
                    map.put(field.getName(), field.get(anEnum));
                } catch (IllegalArgumentException | IllegalAccessException e) {
                    e.printStackTrace();
                }
            }
            // 将Map添加到集合中
            resultList.add(map);
        }
        return resultList;
    }

    public static void main(String[] args) {


        // 枚举类
        System.out.println(enumToListMap(EducateStatusEnum.class));


    }

}      

实现效果： 

[

{name=在读, code=1},

{name=肆业, code=2},

{name=休学, code=3},

{name=辍学, code=4},