JAVA日常游玩-----用EnumMap优化代码。

1.首先认识一下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("服务1", "ServerOne");
			map1.put("服务2", "ServerTwo");
			map1.put("服务3", "ServerThree");
			enumMap.put(FirstEnum.APP_SERVICE, map1);

			Map<String, String> map2 = Maps.newHashMap();
			map2.put("资产1", "AssertOne");
			map2.put("资产2", "AssertTwo");
			map2.put("资产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.贴上需要优化的代码片段

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.上面代码涉及到的枚举类（FirstEnum,AppServiceEnum,AssertEnum,ClusterEnum,ConfigInfoEnum,InstanceNodeEnum)

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

	/**
	 * 首层展示支持,V3版本
	 */
	APP_SERVICE(1,"服务","app_server"),
	ASSERT(2,"资产","Asset"),
	INSTANCE_NODE(3,"节点","Instancenode"),
	CLUSTER(4,"集群","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支撑
 * @author chenzhen
 *         Created by chenzhen on 2018/11/19.
 */
public enum AppServiceEnum {

	/**
	 * 服务类型枚举
	 */
	TuxedoService(1,"tuxedo服务", "tuxedo_app_server"),
	MicroServiceRestful(2,"微服务接口服务", "microServiceRestfull_app_server"),
	WeblogicService(3,"weblogic服务", "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支撑
 * @author chenzhen
 *         Created by chenzhen on 2018/11/19.
 */
public enum  AssertEnum {
	/**
	 * 资产类型枚举
	 */
	Server(1,"服务器", "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 {
	/**
	 * 集群枚举
	 */
	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 {
	/**
	 * 配置类型枚举
	 */
	JDBC(1,"JDBC连接配置", "JDBC"),
	MARATHON_APP(2,"marathon_app节点定义", "manathon"),
	//NetworkPoint("Network point", "Network point", 22),
	//Office("Office", "Office", 23),
	ORACLE_STORE(3,"Oracle存储", "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("人力资源", "Employee", 46),
	APPLICATION(10,"应用服务", "Application"),
	APP_CLUSTER(11,"应用集群", "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 {
	/**
	 * 实例节点枚举
	 */
	F5Info(1,"F5负载均衡节点", "F5Info"),
	Hbase(2,"Hbase节点", "Hbaseserver"),
	HDFS(3,"HDFS节点", "HDFS"),
	Kafka(4,"Kafka节点", "Kafka"),
	Marath(5,"marath_lb负载均衡", "marath"),
	Mysql(6,"Mysql节点", "Mysqlserver"),
	OracleDb(7,"Oracle数据库节点", "Oracledb"),
	Redis(8,"redis节点", "redis"),
	Tomcat(9,"Tomcat节点", "Tomcatserver"),
	Tuxedo(10,"Tuxedo服务节点", "Tuxedoserver"),
	WeblogicConsle(11,"weblogic控制台节点", "weblogicconsle"),
	Weblogic(12,"weblogic节点", "weblogic"),
	Zookeeper(13,"Zookeeper节点", "ZooKeeper"),
	OtherSoftware(14,"其他软件节点", "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.从上面看这个代码的异常的臃肿。

5.接下来我们来借助EnumMap来优化它。

精简枚举类

FirstEnum不变

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

	/**
	 * 首层展示支持,V3版本
	 */
	APP_SERVICE(1,"服务","app_server"),
	ASSERT(2,"资产","Asset"),
	INSTANCE_NODE(3,"节点","Instancenode"),
	//CLUSTER(4,"集群","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;
	}
}

添加一个EnumMap类

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服务");
		map1.put("microServiceRestfull_app_server", "微服务接口服务");
		map1.put("weblogic_app_server", "WebLogic服务");
		typeEnumMap.put(FirstEnum.APP_SERVICE, map1);

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


		Map<String, String> map3 = Maps.newHashMap();
		map3.put("JDBC", "JDBC连接配置");
		map3.put("manathon", "marathon_app节点定义");
		map3.put("Oracle_store", "Oracle存储");
		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", "应用服务");
		map3.put("app_cluster", "应用集群");

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



		Map<String,String> map4 = Maps.newHashMap();
		map4.put("HDFS","HDFS节点");
		map4.put("Tuxedoserver","Tuxedo服务节点");
		map4.put("weblogicconsle","weblogic控制台节点");
		map4.put("weblogic","weblogic节点");
		map4.put("ZooKeeper","Zookeeper节点");
		map4.put("F5Info","F5负载均衡节点");
		map4.put("Hbaseserver","HBase节点");
		map4.put("Kafka","Kafka节点");
		map4.put("marath","marathon_lb负载均衡节点");
		map4.put("Oracledb","Oracle数据库节点");
		map4.put("Mysqlserver","Mysql节点");
		map4.put("redis","Redis节点");
		map4.put("Tomcatserver","Tomcat节点");
		map4.put("Othersoftware","其他软件节点");
		typeEnumMap.put(FirstEnum.INSTANCE_NODE,map4);


	}
}

修改原来冗余丑陋可扩展行差的switchcase

/**
	 * 获取son的list
	 *
	 * @param firstEnum 枚举元素
	 * @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;
	}

至此优化结束。

JAVA日常游玩-----用EnumMap优化代码。

JAVA日常游玩-----用EnumMap优化代码。

继续阅读

关于ssm分布式项目中的No converter found for return value of type问题

IDEA中properties文件中unicode 编码设置小写

Linux服务器Java jdk11 安装和配置(2)更新apt安装openJdk jre11查看java安装路径环境变量配置

如何通过JDBC连接远程服务端的数据库1.本地navicat链接到远程服务端

docker拉取镜像报错

集合List＜?＞根据属性分组列表

精讲RestTemplate-POST请求方法使用详解

SpringBoot 中使用 HandlerInterceptor 拦截器 @Autowired 注入的 DAO 为空

java 8中 Consumer、Function、Predicate、Supplier接口的冒号使用详解

java收徒 java辅导

idea　检出　maven工程下源文件目录main/src/java问题

Java List sort 报错java.lang.UnsupportedOperationException

拦截器+自定义注解验证 Token 登录

JVM运行时内存划分与JVM内存模型

ssm框架中静态资源的访问不到_解决方法

Spring配置AOP切入点execution详解