马府强
2 years ago
15 changed files with 225 additions and 0 deletions
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# Default ignored files |
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/shelf/ |
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/workspace.xml |
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# Datasource local storage ignored files |
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/../../../../:\java project\celuemoshijingjian\.idea/dataSources/ |
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/dataSources.local.xml |
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# Editor-based HTTP Client requests |
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/httpRequests/ |
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<?xml version="1.0" encoding="UTF-8"?> |
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<project version="4"> |
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<component name="CompilerConfiguration"> |
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<annotationProcessing> |
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<profile name="Maven default annotation processors profile" enabled="true"> |
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<sourceOutputDir name="target/generated-sources/annotations" /> |
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<sourceTestOutputDir name="target/generated-test-sources/test-annotations" /> |
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<outputRelativeToContentRoot value="true" /> |
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<module name="celuemoshijingjian" /> |
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</profile> |
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</annotationProcessing> |
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</component> |
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</project> |
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<?xml version="1.0" encoding="UTF-8"?> |
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<project version="4"> |
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<component name="RemoteRepositoriesConfiguration"> |
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<remote-repository> |
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<option name="id" value="central" /> |
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<option name="name" value="Central Repository" /> |
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<option name="url" value="https://repo.maven.apache.org/maven2" /> |
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</remote-repository> |
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<remote-repository> |
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<option name="id" value="central" /> |
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<option name="name" value="Maven Central repository" /> |
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<option name="url" value="https://repo1.maven.org/maven2" /> |
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</remote-repository> |
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<remote-repository> |
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<option name="id" value="jboss.community" /> |
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<option name="name" value="JBoss Community repository" /> |
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<option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" /> |
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</remote-repository> |
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</component> |
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</project> |
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<?xml version="1.0" encoding="UTF-8"?> |
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<project version="4"> |
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<component name="ExternalStorageConfigurationManager" enabled="true" /> |
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<component name="MavenProjectsManager"> |
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<option name="originalFiles"> |
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<list> |
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<option value="$PROJECT_DIR$/pom.xml" /> |
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</list> |
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</option> |
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</component> |
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<component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="1.8" project-jdk-type="JavaSDK"> |
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<output url="file://$PROJECT_DIR$/out" /> |
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</component> |
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</project> |
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<?xml version="1.0" encoding="UTF-8"?> |
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<module type="JAVA_MODULE" version="4" /> |
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<?xml version="1.0" encoding="UTF-8"?> |
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<project xmlns="http://maven.apache.org/POM/4.0.0" |
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" |
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> |
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<modelVersion>4.0.0</modelVersion> |
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<groupId>com.woniu</groupId> |
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<artifactId>celuemoshijingjian</artifactId> |
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<version>1.0-SNAPSHOT</version> |
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</project> |
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package com.woniu.celuejj; |
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import java.util.function.Function; |
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import java.util.function.Predicate; |
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/** |
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* 用java 8的函数式接口和泛型 优化策略模式(简化写法) |
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* 进而优化if else逻辑 |
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* @className: FunctionStrategy |
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* @author: woniu |
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* @date: 2023/2/11 |
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**/ |
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public interface FunctionStrategy<P, T, R> { |
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/** |
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* 暴露当前策略的钩子 |
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* |
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* @return 判断钩子 |
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*/ |
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Predicate<P> predicate(); |
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/** |
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* 暴露当前策略的生产逻辑 |
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* |
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* @return 消费逻辑 |
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*/ |
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Function<T, R> function(); |
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} |
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package com.woniu.celuejj; |
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import java.util.function.Function; |
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import java.util.function.Predicate; |
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/** |
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* 策略模式简化写法 来优化if else逻辑 |
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* String 代表来自区域风险系数 |
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* Integer 打工人 |
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* String 村里开具证明 |
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*/ |
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enum ReturnHomeStrategy implements FunctionStrategy<String, Integer, String> { |
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/** |
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* 高风险 |
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*/ |
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HIGH_RISK(from -> "HIGH_RISK".equals(from), i -> i+"在高风险回来了,get out!"), |
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/** |
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* 中风险 |
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*/ |
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MIDDLE_RISK(from -> "MIDDLE_RISK".equals(from), i -> i+"在中风险回来了,get out!"), |
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/** |
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* 低风险 |
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*/ |
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LOW_RISK(from -> "LOW_RISK".equals(from), i -> i+"在低风险回来了,拉走先做个核酸检测!"); |
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private final Predicate<String> predicate; |
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private final Function<Integer, String> function; |
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public Predicate<String> getPredicate() { |
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return predicate; |
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} |
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public Function<Integer, String> getFunction() { |
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return function; |
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} |
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ReturnHomeStrategy(Predicate<String> predicate, Function<Integer, String> function) { |
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this.predicate = predicate; |
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this.function = function; |
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} |
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@Override |
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public Predicate<String> predicate() { |
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return this.predicate; |
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} |
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@Override |
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public Function<Integer, String> function() { |
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return this.function; |
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} |
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} |
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package com.woniu.celuejj; |
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/** |
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* 策略模式简化写法 来优化if else逻辑 |
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*/ |
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public class TestMain { |
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public static void main(String[] args) { |
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String low_risk = returnHome("LOW_RISK", 1); |
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System.out.println(low_risk); |
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} |
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/** |
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* 某人回村 |
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* @param from 代表区域风险系数 |
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* @param id 打工人 |
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* @return 要证明 |
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*/ |
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public static String returnHome(String from, Integer id) { |
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for (ReturnHomeStrategy value : ReturnHomeStrategy.values()) { |
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if (value.predicate().test(from)) { |
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return value.function().apply(id); |
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} |
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} |
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throw new RuntimeException("外星人,抓起来放进动物园卖门票!"); |
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} |
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} |
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package com.woniu.celuejj.celueyuanxing; |
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/** |
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* 用java 8的函数式接口和泛型 优化策略模式(简化写法) |
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* 进而优化if else逻辑 |
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* 疫情期间 某人回村为例 |
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* @className: FunctionStrategy |
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* @author: woniu |
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* @date: 2023/2/11 |
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**/ |
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public interface FunctionStrategy { |
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void huicun(); |
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} |
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package com.woniu.celuejj.celueyuanxing; |
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public class HighRiskFunctionStrategy implements FunctionStrategy { |
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@Override |
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public void huicun() { |
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System.out.println("在高风险回来了,get out!"); |
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} |
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} |
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package com.woniu.celuejj.celueyuanxing; |
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public class LowRiskStrategy implements FunctionStrategy { |
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@Override |
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public void huicun() { |
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System.out.println("在低风险回来了,先做个核酸吧!"); |
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} |
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} |
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package com.woniu.celuejj.celueyuanxing; |
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public class MiddleRiskStrategy implements FunctionStrategy { |
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@Override |
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public void huicun() { |
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System.out.println("在中风险回来了,get out!"); |
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} |
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} |
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