Question

我在这里发现了一些类似的问题，但不完全相同。

如果我的枚举值不是序数，我如何将类字段映射到该枚举类型？

---数据库级别 - 查找表值

insert into ShowInfoLookup(ID, Name) values (0 | 64, 'Hide (auto set by the system)');

insert into ShowInfoLookup(ID, Name) values (1 | 64, 'Show (auto set by the system)');

insert into ShowInfoLookup(ID, Name) values (0 | 128, 'Hide (manually set)');

insert into ShowInfoLookup(ID, Name) values (1 | 128, 'Show (manually set)');

---枚举的Java代码

package com.test.constants;

public enum ShowInfoLookup {

    Invalid(0),
    HideAutoSet(Value.HIDE | Value.AUTO_SET), // 64
    ShowAutoSet(Value.SHOW | Value.AUTO_SET), // 65
    HideManuallySet(Value.HIDE | Value.MANUALLY_SET), // 128
    ShowManuallySet(Value.SHOW | Value.MANUALLY_SET); // 129

    private static class Value {
        private static final int HIDE = 0; // false - hide
        private static final int SHOW = 1; // true - show
        private static final int AUTO_SET = 64;
        private static final int MANUALLY_SET = 128;
    }

    private int value = 0;

    private ShowInfoLookup(int value) {
        this.value = value;
    }

    public int getValue() {
        return value;
    }

    public String toString() {
        return String.valueOf(value);
    }

    public static ShowInfoLookup getInstance(int value) {
        for (ShowInfoLookup type : ShowInfoLookup.values()) {
            if (value == type.value) {
                return type;
            }
        }

        return Invalid;
    }

}

---我有Hibernate Entity类，我知道EnumType.ORDINAL在这里工作

public class Item {

    @Column(name ="ShowAnalystInfo", nullable = false)
    @Enumerated(EnumType.ORDINAL)
    private ShowInfoLookup showInfo;

}

Hibernate - 将列映射到枚举类型（值不是序数）

0 个答案: