Merge branch 'init' into 'main'

init

See merge request !1

src/main/java/factory/static1/StaticFactory.java

+package factory.static1;
+
+import factory.BMW;
+
+/**
+ * Copyright (c) 2021, ustchcs and its affiliates. All rights reserved. More info see www.ustchcs.com
+ *
+ * @author cch
+ * @package Thymeleaf1 com.example.demo.design
+ * @node
+ */
+public class StaticFactory {
+    public static void main(String[] args) {
+        BMW car730 = BMWFactory.productBMW("730");
+        BMW car840 = BMWFactory.productBMW("840");
+
+        if (car730 != null) {
+            car730.run();
+        }
+        if (car840 != null) {
+            car840.run();
+        }
+    }
+}

src/main/java/strategy/CustomAuthenticator.java

+package strategy;
+
+/**
+ * Copyright (c) 2023, ustchcs and its affiliates. All rights reserved. More info see www.ustchcs.com
+ *
+ * @author cch
+ * @package java-test strategy
+ * @node
+ */
+public class CustomAuthenticator {
+    private IStrategy strategy;
+
+    public CustomAuthenticator(IStrategy strategyInput) {
+        this.strategy = strategyInput;
+    }
+
+    public void authenticate(String name, String password) {
+        if (this.strategy == null) {
+            System.out.println("no strategy");
+            return;
+        }
+        this.strategy.authenticate(name, password);
+    }
+
+    public void setStrategy(IStrategy strategy) {
+        this.strategy = strategy;
+    }
+}

src/main/java/strategy/IStrategy.java

+package strategy;
+
+/**
+ * Copyright (c) 2023, ustchcs and its affiliates. All rights reserved. More info see www.ustchcs.com
+ *
+ * @author cch
+ * @package java-test strategy
+ * @node
+ */
+public interface IStrategy {
+    void authenticate(String name, String password);
+}

src/main/java/strategy/LocalStrategy.java

+package strategy;
+
+import tool.StrUtils;
+
+/**
+ * Copyright (c) 2023, ustchcs and its affiliates. All rights reserved. More info see www.ustchcs.com
+ *
+ * @author cch
+ * @package java-test strategy
+ * @node
+ */
+public class LocalStrategy implements IStrategy {
+    @Override
+    public void authenticate(String name, String password) {
+        System.out.println(StrUtils.concatNullToEmpty("local login:name=", name));
+    }
+}

src/main/java/strategy/StrategyDesign.java

+package strategy;
+
+/**
+ * Copyright (c) 2021, ustchcs and its affiliates. All rights reserved. More info see www.ustchcs.com
+ *
+ * @author cch
+ * @package Thymeleaf1 com.example.demo.design.strategy
+ * @node
+ */
+public class StrategyDesign {
+    public static void main(String[] args) {
+        WechatStrategy wechatStrategy = new WechatStrategy();
+        CustomAuthenticator customAuthenticator = new CustomAuthenticator(wechatStrategy);
+        customAuthenticator.authenticate("cch", "1234556");
+
+        customAuthenticator.setStrategy(new LocalStrategy());
+        customAuthenticator.authenticate("cch2", "12345567");
+    }
+}
+

src/main/java/strategy/WechatStrategy.java

+package strategy;
+
+import tool.StrUtils;
+
+/**
+ * Copyright (c) 2023, ustchcs and its affiliates. All rights reserved. More info see www.ustchcs.com
+ *
+ * @author cch
+ * @package java-test strategy
+ * @node
+ */
+public class WechatStrategy implements IStrategy {
+    @Override
+    public void authenticate(String name, String password) {
+        System.out.println(StrUtils.concatNullToEmpty("wechat login:name=", name));
+    }
+}

src/main/java/tool/StrUtils.java

+
+package tool;
+
+
+/**
+ * Copyright (c) 2023, ustchcs and its affiliates. All rights reserved. More
+ * info see www.ustchcs.com
+ *
+ * @author cch
+ * @package backend com.ustchcs.qualityhub.system.utils
+ * @node
+ */
+public class StrUtils {
+    public static final String EMPTY = "";
+
+    public static String concatNullToEmpty(CharSequence... strs) {
+        return concat(true, strs);
+    }
+
+    public static String concat(boolean isNullToEmpty, CharSequence... strs) {
+        final StringBuilder sb = new StringBuilder();
+        for (CharSequence str : strs) {
+            if (isNullToEmpty) {
+                sb.append(nullToEmpty(str));
+            } else {
+                sb.append(str);
+            }
+        }
+        return sb.toString();
+    }
+
+    public static String nullToEmpty(CharSequence str) {
+        return nullToDefault(str, EMPTY);
+    }
+
+    public static String nullToDefault(CharSequence str, String defaultStr) {
+        if (str == null) {
+            return defaultStr;
+        }
+
+        return str.toString();
+    }
+}