枚举的使用

package com.erp.sign.pojo.constants;

import java.util.HashMap;
import java.util.Map;

/**
 *
 * 合同状态枚举
 * @auther han
 * @date 2021/1/19
 */
public enum MyContractStatus {
    DRAFT("DRAFT","草稿"),
    SIGNING("SIGNING","签署中"),
    COMPLETE("COMPLETE","已完成"),
    REJECTED("REJECTED","已退回"),
    RECALLED("RECALLED","已撤回"),
    EXPIRED("EXPIRED","已过期"),
    FILLING("FILLING","拟定中"),
    TERMINATING("TERMINATING","作废确认中"),
    TERMINATED("TERMINATED","已作废"),
    DELETE("DELETE","已删除"),
    FINISHED("FINISHED","已完成"),
    CANCELLED("CANCELLED","已作废");

    private final String val;
    private final String labCode;

    private static Map<String, MyContractStatus> enumMap;

    MyContractStatus(String val, String labCode) {
        this.val = val;
        this.labCode = labCode;
    }

    public String getVal() {
        return val;
    }

    public String getLabel() {
        return labCode;
    }
    public static MyContractStatus getInstByVal(String key) {
        if (enumMap == null) {
            synchronized (MyContractStatus.class) {
                if (enumMap == null) {
                    enumMap = new HashMap<String, MyContractStatus>();
                    for (MyContractStatus perEnum : MyContractStatus.values()) {
                        enumMap.put(perEnum.getVal() + "", perEnum);
                    }
                }
            }
        }
        if (!enumMap.containsKey(key)) {
            throw new RuntimeException("状态值" + key + "对应的MyContractStatus枚举值不存在。");
        }
        return enumMap.get(key);
    }

}