ツールの種類を記録して、List集合の中のmap対象の中のvalueの値を重要にします。

4749 ワード
package .warning.util;

import java.util.*;

/**
 * TODO:  map        
 * @author 
 * @version 1.0
 * @description TODO
 * @date 2019/10/18 18:08
 **/
public class ListMapUtil {

    public static List> toDistinctList(List> list) {

        //  set  ，  set          ，      
        Set keysSet = new HashSet();

        //      
        String equipmentNo = "";
        String depotName = "";

        Iterator> it=list.iterator();
        while(it.hasNext()) {
            Map map=it.next();
            //        key     
            equipmentNo = (String) map.get("equipmentNo");
            depotName = (String) map.get("depotName");

            //      ，   equals hashcode  
            DispatchCommandsPo  dispatchCommandsPo = new DispatchCommandsPo();
            dispatchCommandsPo.setEquipmentNo(equipmentNo);
            dispatchCommandsPo.setDepotName(depotName);

            int beforeSize = keysSet.size();
            keysSet.add(dispatchCommandsPo);
            int afterSize = keysSet.size();
            //           set   （      set        ，    map  ）
            if(afterSize != (beforeSize + 1)) {
                it.remove();
            }
        }
        return list;
    }
    static class DispatchCommandsPo {

        private String equipmentNo;
        private String depotName;

        public String getEquipmentNo() {
            return equipmentNo;
        }

        public void setEquipmentNo(String equipmentNo) {
            this.equipmentNo = equipmentNo;
        }

        public String getDepotName() {
            return depotName;
        }

        public void setDepotName(String depotName) {
            this.depotName = depotName;
        }

        //  hashcode  
        @Override
        public int hashCode() {
            int result = 17;
            result = 31 * result + (equipmentNo == null ? 0 : equipmentNo.hashCode());
            result = 31 * result + (depotName == null ? 0 : depotName.hashCode());
            return result;
        }

        //  equals  
        @Override
        public boolean equals(Object obj) {
            if (obj instanceof DispatchCommandsPo) {
                DispatchCommandsPo dispatchCommandsPo = (DispatchCommandsPo) obj;
                if (equipmentNo.equalsIgnoreCase(dispatchCommandsPo.getEquipmentNo().trim()) &&
                        depotName.equalsIgnoreCase(dispatchCommandsPo.getDepotName().trim())) {
                    return true;
                }
            }
            return false;
        }

    }


    public static List> toDistinctList2(List> list) {

        //  set  ，  set          ，      
        Set keysSet = new HashSet();

        //      
        String fenceName = "";

        Iterator> it=list.iterator();
        while(it.hasNext()) {
            Map map=it.next();
            //        key     
            fenceName = (String) map.get("fenceName");

            //      ，   equals hashcode  
            DispatchCommandsPo2  dispatchCommandsPo2 = new DispatchCommandsPo2();
            dispatchCommandsPo2.setFenceName(fenceName);


            int beforeSize = keysSet.size();
            keysSet.add(dispatchCommandsPo2);
            int afterSize = keysSet.size();
            //           set   （      set        ，    map  ）
            if(afterSize != (beforeSize + 1)) {
                it.remove();
            }
        }
        return list;
    }

    static class DispatchCommandsPo2 {

        private String fenceName;

        public String getFenceName() {
            return fenceName;
        }

        public void setFenceName(String fenceName) {
            this.fenceName = fenceName;
        }

        //  hashcode  
        @Override
        public int hashCode() {
            int result = 17;
            result = 31 * result + (fenceName == null ? 0 : fenceName.hashCode());
            return result;
        }

        //  equals  
        @Override
        public boolean equals(Object obj) {
            if (obj instanceof DispatchCommandsPo2) {
                DispatchCommandsPo2 dispatchCommandsPo2 = (DispatchCommandsPo2) obj;
                if (fenceName.equalsIgnoreCase(dispatchCommandsPo2.getFenceName().trim())) {
                    return true;
                }
            }
            return false;
        }

    }
}
六@Resourceで属性組立を完成しました。
Javaマルチスレッドの実現方式とライフサイクル