JAVA日常遊玩-----用EnumMap優化代碼。

1.首先認識一下EnumMap

import cn.chinaunicom.consts.FirstEnum;
import cn.chinaunicom.consts.TEnum;
import cn.chinaunicom.pojo.vo.one.v3.Son;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import org.junit.Test;

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.EnumMap;
import java.util.List;
import java.util.Map;

/**
 * @author chenzhen
 *         Created by chenzhen on 2018/11/26.
 */
public class EnumTest {

	@Test
	public void testEnum() {
		List enumList = Lists.newArrayList();
		enumList.addAll(Lists.newArrayList(FirstEnum.values()));

	}

	static class TEnumMap {

		private EnumMap<FirstEnum, Map<String, String>> enumMap = new EnumMap<>(FirstEnum.class);

		{
			Map<String, String> map1 = Maps.newHashMap();
			map1.put("服務1", "ServerOne");
			map1.put("服務2", "ServerTwo");
			map1.put("服務3", "ServerThree");
			enumMap.put(FirstEnum.APP_SERVICE, map1);

			Map<String, String> map2 = Maps.newHashMap();
			map2.put("資産1", "AssertOne");
			map2.put("資産2", "AssertTwo");
			map2.put("資産3", "AssertThree");
			enumMap.put(FirstEnum.ASSERT, map2);
		}

	}

	@Test
	public void testTEnumMap() {
		TEnumMap tEnum = new TEnumMap();

		for (Map.Entry<FirstEnum, Map<String, String>> e : tEnum.enumMap.entrySet()) {
			System.out.println(e.getKey());
			for (Map.Entry<String, String> m : e.getValue().entrySet()) {
				System.out.print(m.getKey() + "\t" + m.getValue());
			}
			System.out.println();
		}

	}

}

2.貼上需要優化的代碼片段

private ArrayList<Son> getSons(FirstEnum firstEnum) {

		switch (firstEnum){
			case APP_SERVICE:{
				ArrayList<Son> sonArrayList = Lists.newArrayList();
				//app_service
				for(AppServiceEnum appServiceEnum : AppServiceEnum.values()){
					Son son = Son.builder()
							.id(appServiceEnum.getDescription())
							.number(TypeNumberCache.getKey(appServiceEnum.getIdentification()))
							.healthy(TypeNumberCache.getKey(appServiceEnum.getIdentification()))
							.unHealthy(0)
							.build();
					sonArrayList.add(son);
				}
				return sonArrayList;
			}
			case ASSERT:{
				ArrayList<Son> sonArrayList = Lists.newArrayList();
				//app_service
				for(AssertEnum assertEnum : AssertEnum.values()){
					Son son = Son.builder()
							.id(assertEnum.getDescription())
							.number(TypeNumberCache.getKey(assertEnum.getIdentification()))
							.healthy(TypeNumberCache.getKey(assertEnum.getIdentification()))
							.unHealthy(0)
							.build();
					sonArrayList.add(son);
				}
				return sonArrayList;
			}
			case INSTANCE_NODE:{
				ArrayList<Son> sonArrayList = Lists.newArrayList();
				//app_service
				for(InstanceNodeEnum instanceNode : InstanceNodeEnum.values()){
					Son son = Son.builder()
							.id(instanceNode.getDescription())
							.number(TypeNumberCache.getKey(instanceNode.getIdentification()))
							.healthy(TypeNumberCache.getKey(instanceNode.getIdentification()))
							.unHealthy(0)
							.build();
					sonArrayList.add(son);
				}
				return sonArrayList;
			}
			case CONFIG_INFO:{
				ArrayList<Son> sonArrayList = Lists.newArrayList();
				//config_info
				for(ConfigInfoEnum configInfoEnum : ConfigInfoEnum.values()){
					Son son = Son.builder()
							.id(configInfoEnum.getDescription())
							.number(TypeNumberCache.getKey(configInfoEnum.getIdentification()))
							.healthy(TypeNumberCache.getKey(configInfoEnum.getIdentification()))
							.unHealthy(0)
							.build();
					sonArrayList.add(son);
				}
				return sonArrayList;
			}
			case CLUSTER:{
				ArrayList<Son> sonArrayList = Lists.newArrayList();
				for(ClusterEnum clusterEnum : ClusterEnum.values()){
					Son son = Son.builder()
							.id(clusterEnum.getDescription())
							.number(TypeNumberCache.getKey(clusterEnum.getIdentification()))
							.healthy(TypeNumberCache.getKey(clusterEnum.getIdentification()))
							.unHealthy(0)
							.build();
					sonArrayList.add(son);
				}
				return sonArrayList;
			}
			default:{

			}
		}
		return Lists.newArrayList();
	}

3.上面代碼涉及到的枚舉類（FirstEnum,AppServiceEnum,AssertEnum,ClusterEnum,ConfigInfoEnum,InstanceNodeEnum)

/**
 * v3支撐
 * @author chenzhen
 *         Created by chenzhen on 2018/11/19.
 */
public enum FirstEnum {

	/**
	 * 首層展示支援,V3版本
	 */
	APP_SERVICE(1,"服務","app_server"),
	ASSERT(2,"資産","Asset"),
	INSTANCE_NODE(3,"節點","Instancenode"),
	CLUSTER(4,"叢集","app_server_cluster"),
	CONFIG_INFO(5,"配置","Configinfo");
	int code;
	String description;
	String identification;

	FirstEnum(int code, String description, String identification) {
		this.code = code;
		this.description = description;
		this.identification = identification;
	}

	public int getCode() {
		return code;
	}

	public void setCode(int code) {
		this.code = code;
	}

	public String getDescription() {
		return description;
	}

	public void setDescription(String description) {
		this.description = description;
	}

	public String getIdentification() {
		return identification;
	}

	public void setIdentification(String identification) {
		this.identification = identification;
	}
}

/**
 * v3支撐
 * @author chenzhen
 *         Created by chenzhen on 2018/11/19.
 */
public enum AppServiceEnum {

	/**
	 * 服務類型枚舉
	 */
	TuxedoService(1,"tuxedo服務", "tuxedo_app_server"),
	MicroServiceRestful(2,"微服務接口服務", "microServiceRestfull_app_server"),
	WeblogicService(3,"weblogic服務", "weblogic_app_server");
	int code;
	String description;
	String identification;

	AppServiceEnum(int id, String description, String identification) {
		this.code = id;
		this.description = description;
		this.identification = identification;
	}

	public int getCode() {
		return code;
	}

	public void setCode(int code) {
		this.code = code;
	}

	public String getDescription() {
		return description;
	}

	public void setDescription(String description) {
		this.description = description;
	}

	public String getIdentification() {
		return identification;
	}

	public void setIdentification(String identification) {
		this.identification = identification;
	}
}

/**
 * v3支撐
 * @author chenzhen
 *         Created by chenzhen on 2018/11/19.
 */
public enum  AssertEnum {
	/**
	 * 資産類型枚舉
	 */
	Server(1,"伺服器", "Server");
	int code;
	String description;
	String identification;

	AssertEnum(int code, String description, String identification) {
		this.code = code;
		this.description = description;
		this.identification = identification;
	}

	public int getCode() {
		return code;
	}

	public void setCode(int code) {
		this.code = code;
	}

	public String getDescription() {
		return description;
	}

	public void setDescription(String description) {
		this.description = description;
	}

	public String getIdentification() {
		return identification;
	}

	public void setIdentification(String identification) {
		this.identification = identification;
	}
}

/**
 * @author chenzhen
 *         Created by chenzhen on 2018/11/21.
 */
public enum ClusterEnum {
	/**
	 * 叢集枚舉
	 */
	TUXEDO_CLUSTER(1,"Tuxedo_app_group", "App_server_cluster_tuxedo"),
	WeblogicCluster(2,"weblogic_app_group", "App_server_cluster_weblogic");
	int code;
	String description;
	String identification;

	ClusterEnum(int code, String description, String identification) {
		this.code = code;
		this.description = description;
		this.identification = identification;
	}

	public int getCode() {
		return code;
	}

	public void setCode(int code) {
		this.code = code;
	}

	public String getDescription() {
		return description;
	}

	public void setDescription(String description) {
		this.description = description;
	}

	public String getIdentification() {
		return identification;
	}

	public void setIdentification(String identification) {
		this.identification = identification;
	}
}

/**
 * @author chenzhen
 *         Created by chenzhen on 2018/11/20.
 */
public enum ConfigInfoEnum {
	/**
	 * 配置類型枚舉
	 */
	JDBC(1,"JDBC連接配接配置", "JDBC"),
	MARATHON_APP(2,"marathon_app節點定義", "manathon"),
	//NetworkPoint("Network point", "Network point", 22),
	//Office("Office", "Office", 23),
	ORACLE_STORE(3,"Oracle存儲", "Oracle_store"),
	ORACLE_RAC(4,"Oracle_rac", "Oracle_rac"),
	//Room("Room", "Room", 26),
	//ServiceArea("service_area", "service_area", 27),
	//Supplier("Supplier", "Supplier", 28),
	//SupplierContact("SupplierContact", "SupplierContact", 29),
	//Users("Users", "Users", 30),
	//Workplace("Workplace", "Workplace", 40),
	WTC(5,"WTC", "WTC"),
	WTC_EXPORTS(6,"wtc_exports", "wtc_exports"),
	WTC_IMPORTS(7,"wtc_imports", "wtc_imports"),
	WTC_LOCAL(8,"wtc_local", "wtc_local"),
	WTC_REMOTE(9,"wtc_remote", "wtc_remote"),
	//Employee("人力資源", "Employee", 46),
	APPLICATION(10,"應用服務", "Application"),
	APP_CLUSTER(11,"應用叢集", "app_cluster");
	int id;
	String description;
	String identification;

	ConfigInfoEnum(int id, String description, String identification) {
		this.id = id;
		this.description = description;
		this.identification = identification;
	}

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getDescription() {
		return description;
	}

	public void setDescription(String description) {
		this.description = description;
	}

	public String getIdentification() {
		return identification;
	}

	public void setIdentification(String identification) {
		this.identification = identification;
	}
}

/**
 * @author chenzhen
 *         Created by chenzhen on 2018/11/19.
 */
public enum InstanceNodeEnum {
	/**
	 * 執行個體節點枚舉
	 */
	F5Info(1,"F5負載均衡節點", "F5Info"),
	Hbase(2,"Hbase節點", "Hbaseserver"),
	HDFS(3,"HDFS節點", "HDFS"),
	Kafka(4,"Kafka節點", "Kafka"),
	Marath(5,"marath_lb負載均衡", "marath"),
	Mysql(6,"Mysql節點", "Mysqlserver"),
	OracleDb(7,"Oracle資料庫節點", "Oracledb"),
	Redis(8,"redis節點", "redis"),
	Tomcat(9,"Tomcat節點", "Tomcatserver"),
	Tuxedo(10,"Tuxedo服務節點", "Tuxedoserver"),
	WeblogicConsle(11,"weblogic控制台節點", "weblogicconsle"),
	Weblogic(12,"weblogic節點", "weblogic"),
	Zookeeper(13,"Zookeeper節點", "ZooKeeper"),
	OtherSoftware(14,"其他軟體節點", "Othersoftware");
	int code;
	String description;
	String identification;

	InstanceNodeEnum(int code,String description,String identification) {
		this.code = code;
		this.identification = identification;
		this.description = description;
	}

	public int getCode() {
		return code;
	}

	public void setCode(int code) {
		this.code = code;
	}

	public String getDescription() {
		return description;
	}

	public void setDescription(String description) {
		this.description = description;
	}

	public String getIdentification() {
		return identification;
	}

	public void setIdentification(String identification) {
		this.identification = identification;
	}
}

4.從上面看這個代碼的異常的臃腫。

5.接下來我們來借助EnumMap來優化它。

精簡枚舉類

FirstEnum不變

/**
 * v3支撐
 * @author chenzhen
 *         Created by chenzhen on 2018/11/19.
 */
public enum FirstEnum {

	/**
	 * 首層展示支援,V3版本
	 */
	APP_SERVICE(1,"服務","app_server"),
	ASSERT(2,"資産","Asset"),
	INSTANCE_NODE(3,"節點","Instancenode"),
	//CLUSTER(4,"叢集","app_server_cluster"),
	CONFIG_INFO(5,"配置","Configinfo");
	int code;
	String description;
	String identification;

	FirstEnum(int code, String description, String identification) {
		this.code = code;
		this.description = description;
		this.identification = identification;
	}

	public int getCode() {
		return code;
	}

	public void setCode(int code) {
		this.code = code;
	}

	public String getDescription() {
		return description;
	}

	public void setDescription(String description) {
		this.description = description;
	}

	public String getIdentification() {
		return identification;
	}

	public void setIdentification(String identification) {
		this.identification = identification;
	}
}

添加一個EnumMap類

import com.google.common.collect.Maps;

import java.util.EnumMap;
import java.util.Map;

/**
 * @author chenzhen
 *         Created by chenzhen on 2018/11/29.
 */
public class TypeEnumMap {

	public static EnumMap<FirstEnum, Map<String, String>> typeEnumMap = new EnumMap<>(FirstEnum.class);

	static {
		Map<String, String> map1 = Maps.newHashMap();
		map1.put("tuxedo_app_server", "Tuxedo服務");
		map1.put("microServiceRestfull_app_server", "微服務接口服務");
		map1.put("weblogic_app_server", "WebLogic服務");
		typeEnumMap.put(FirstEnum.APP_SERVICE, map1);

		Map<String, String> map2 = Maps.newHashMap();
		map2.put("Server", "伺服器");
		typeEnumMap.put(FirstEnum.ASSERT, map2);


		Map<String, String> map3 = Maps.newHashMap();
		map3.put("JDBC", "JDBC連接配接配置");
		map3.put("manathon", "marathon_app節點定義");
		map3.put("Oracle_store", "Oracle存儲");
		map3.put("Oracle_rac", "Oracle_rac");
		map3.put("WTC", "WTC");
		map3.put("wtc_exports", "wtc_exports");
		map3.put("wtc_imports", "wtc_imports");
		map3.put("wtc_local", "wtc_local");
		map3.put("wtc_remote", "wtc_remote");
		map3.put("Application", "應用服務");
		map3.put("app_cluster", "應用叢集");

		map3.put("App_server_cluster_tuxedo","Tuxedo叢集");
		map3.put("App_server_cluster_weblogic","WebLogic叢集");
		typeEnumMap.put(FirstEnum.CONFIG_INFO,map3);



		Map<String,String> map4 = Maps.newHashMap();
		map4.put("HDFS","HDFS節點");
		map4.put("Tuxedoserver","Tuxedo服務節點");
		map4.put("weblogicconsle","weblogic控制台節點");
		map4.put("weblogic","weblogic節點");
		map4.put("ZooKeeper","Zookeeper節點");
		map4.put("F5Info","F5負載均衡節點");
		map4.put("Hbaseserver","HBase節點");
		map4.put("Kafka","Kafka節點");
		map4.put("marath","marathon_lb負載均衡節點");
		map4.put("Oracledb","Oracle資料庫節點");
		map4.put("Mysqlserver","Mysql節點");
		map4.put("redis","Redis節點");
		map4.put("Tomcatserver","Tomcat節點");
		map4.put("Othersoftware","其他軟體節點");
		typeEnumMap.put(FirstEnum.INSTANCE_NODE,map4);


	}
}

修改原來備援醜陋可擴充行差的switchcase

/**
	 * 擷取son的list
	 *
	 * @param firstEnum 枚舉元素
	 * @return sonArrayList
	 */
	private ArrayList<SubAnalysisResult> getSons(FirstEnum firstEnum) {

		ArrayList<SubAnalysisResult> sonArrayList = Lists.newArrayList();

		Map<String, String> stringStringMap = TypeEnumMap.typeEnumMap.get(firstEnum);

		for (Map.Entry<String, String> entry : stringStringMap.entrySet()) {
			SubAnalysisResult subAnalysisResult = SubAnalysisResult.builder()
					.id(entry.getValue())
					.number(TypeNumberCache.getKey(entry.getKey()))
					.healthy(TypeNumberCache.getKey(entry.getKey()))
					.unHealthy(0)
					.build();
			sonArrayList.add(subAnalysisResult);
		}
		return sonArrayList;
	}

至此優化結束。

JAVA日常遊玩-----用EnumMap優化代碼。

JAVA日常遊玩-----用EnumMap優化代碼。

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