JAVA 枚举类遍历与switch使用

Posted 2021-02-28 DylanZ

1、定义枚举类

import com.baomidou.mybatisplus.annotation.EnumValue;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonValue;
import com.zxtech.framework.exception.UnknownEnumException;
import com.zxtech.framework.model.enums.IEnum;
import com.zxtech.framework.util.StringUtils;

/**
 * <p>
 * 流程节点名称枚举
 * </p>
 *
 * @author Caratacus
 */
public enum InstanceNodeEnum implements IEnum {

    JobsiteRequirementFeedbackMainProcess(0, "工地需求反馈主流程启动"),
    JobsiteRequirementTurnback(1, "工地需求修改"),
    FSDPICEngineerPretreatment(2,"FSD/PIC工程师预处理"),
    InstallationOrServiceManagerApproval(3,"安装/维保经理审批"),
    NonStandardDesign(4,"非标设计"),
    PackageDesign(5,"包装设计"),
    FSDPICManagerVerification(6,"FSD/PIC经理审核"),
    ExportMaterialListforJDESARelease(7,"导出物料清单用于JDE/SA释放"),
    PlanOrderConfirmationAMUIPO(8,"计划订单确认(AM/UI PO)"),
    SupplierMaterialShippment(9,"供应商物料发运"),
    MaterialConfirmation(10,"物料确认"),
    OverseasMaterialQuotation(11,"海外物料报价"),
    MaterialShippment(12,"物料发运");
    @EnumValue
    private final int value;

    private final String desc;

    InstanceNodeEnum(int value, String desc) {
        this.value = value;
        this.desc = desc;
    }

    @Override
    public int getValue() {
        return value;
    }

    public String getDesc() {
        return desc;
    }

    /**
     * 通过value取枚举
     * * @param value
     * * @return
     */
    public static InstanceNodeEnum getTypeByValue(String value) {
        if (StringUtils.isEmpty(value)) {
            return null;
        }

        int valueKey = Integer.parseInt(value);
        for (InstanceNodeEnum enums : InstanceNodeEnum.values()) {
            if (enums.getValue() == valueKey) {
                return enums;
            }
        }
        return null;
    }

    /**
     * 通过value取描述
     * * @param value
     * * @return
     */
    public static String getDescByValue(int value) {
        for (InstanceNodeEnum enums : InstanceNodeEnum.values()) {
            if (enums.getValue() == value) {
                return enums.getDesc();
            }
        }
             return"";
}
}

2、枚举类遍历

for (InstanceNodeEnum nodeTypeEnum : InstanceNodeEnum.values()) {
   nodeTypeEnum.getValue();
    nodeTypeEnum.getDesc();
   List<AMTTrackingTbFeedbackinfoDTO> curNodeList=amtTrackingInfoList.stream().filter(s-> (StringUtils.isNotEmpty(s.getInstanceNodeName())&&s.getInstanceNodeName().equals(nodeTypeEnum.getDesc()))).collect(Collectors.toList());
   calcNodeAMTTrackingInfo(String.valueOf(nodeTypeEnum.getValue()),curNodeList,resultList);
}

3、枚举类结合switch使用

private void calcNodeAMTTrackingInfo(String nodeIndex,List<AMTTrackingTbFeedbackinfoDTO> curNodeList,List<JSONObject> resultList) {
   String nowDate=DateUtils.getNowDate();
   InstanceNodeEnum instanceNodeEnum = InstanceNodeEnum.getTypeByValue(nodeIndex);
    switch (instanceNodeEnum) {
        case JobsiteRequirementFeedbackMainProcess:
　　　　　　　　doSomething（）;
　　　　  break;
        case JobsiteRequirementTurnback:
　　　　　　   doSomething();
　　　　 break;
　　　　  default:
　　　　　break;