自动生成的枚举接口（不高级但实用）

枚举要对前端提供接口，提供一个自动装配的工具

1、建model对枚举包装一下

public class EnumBody {

    public String label;
    public Object value;
    public String desc;

    public EnumBody() {
    }

    public EnumBody(String label, Object value) {
        this.label = label;
        this.value = value;
    }

    public EnumBody(String label, Object value, String desc) {
        this.label = label;
        this.value = value;
        this.desc = desc;
    }

    public String getLabel() {
        return label;
    }

    public void setLabel(String label) {
        this.label = label;
    }

    public Object getValue() {
        return value;
    }

    public void setValue(Object value) {
        this.value = value;
    }
}

2、定义枚举，每个枚举有个label的字段用于显示

public enum AlertType {
    OFFLINE("表下线"),
    MODIFY("表变更"),
    EXPIRE("表到期"),
    ;
    public String label;

    AlertType(String label) {
        this.label = label;
    }

    public String getLabel() {
        if(label == null || label.length() == 0){
            label = this.name();
        }
        return label;
    }
}

3、用枚举生成EnumBody的集合

private <E extends Enum> List<EnumBody> getEnumBodies(Class<E> enumClass){
        List<EnumBody> datas = new ArrayList<>();
        Enum[] es = enumClass.getEnumConstants();
        if(es == null || es.length == 0){
            return datas;
        }
        for (Enum e : es) {
            EnumBody body = new EnumBody();
            body.setValue(e.name());
            body.setLabel(e.name());
            String label = getLabel(enumClass, e);
            if(label != null && label.length() > 0){
                body.setLabel(label);
            }
            datas.add(body);
        }
        return datas;
    }

    private <E extends Enum> String getLabel(Class<E> enumClass, Enum e){
        try {
            Field lableField = enumClass.getDeclaredField("label");
            if(lableField == null){
                return null;
            }

            Object fieldValueObject = lableField.get(e);
            if(fieldValueObject == null){
                return null;
            }

            return fieldValueObject.toString();
        } catch (NoSuchFieldException ex) {
            return null;
        } catch (IllegalAccessException ex) {
            return null;
        }
    }

5、调用

List<EnumBody> datas = getEnumBodies(AlertType.class);