Java设计模式

heibaiying · heibaiying · commit efc1088cc862 · 2019-12-05T15:34:06.000+08:00
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/interpreter/AddExpression.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/interpreter/AddExpression.java
@@ -0,0 +1,14 @@
+package com.heibaiying.behavioral.interpreter;
+
+import java.util.HashMap;
+
+public class AddExpression extends SymbolExpression {
+	public AddExpression(Expression left, Expression right) {
+		super(left, right);
+	}
+
+	//&#25226;&#24038;&#21491;&#20004;&#20010;&#34920;&#36798;&#24335;&#36816;&#31639;&#30340;&#32467;&#26524;&#21152;&#36215;&#26469;
+	public int interpreter(HashMap<String, Integer> var) {
+		return super.left.interpreter(var) + super.right.interpreter(var);
+	}
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/interpreter/Calculator.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/interpreter/Calculator.java
@@ -0,0 +1,44 @@
+package com.heibaiying.behavioral.interpreter;
+
+import java.util.HashMap;
+import java.util.Stack;
+
+public class Calculator {
+	//&#23450;&#20041;&#34920;&#36798;&#24335;
+	private Expression expression;
+
+	//&#26500;&#36896;&#20989;&#25968;&#20256;&#21442;&#65292;&#24182;&#35299;&#26512;
+	public Calculator(String expStr) {
+		//&#23450;&#20041;&#19968;&#20010;&#26632;&#65292;&#23433;&#25490;&#36816;&#31639;&#30340;&#20808;&#21518;&#39034;&#24207;
+		Stack<Expression> stack = new Stack<>();
+		//&#34920;&#36798;&#24335;&#25286;&#20998;&#20026;&#23383;&#31526;&#25968;&#32452;
+		char[] charArray = expStr.toCharArray();
+		//&#36816;&#31639;
+		Expression left;
+		Expression right;
+		for (int i = 0; i < charArray.length; i++) {
+			switch (charArray[i]) {
+				case '+': //&#21152;&#27861;
+					//&#21152;&#27861;&#32467;&#26524;&#25918;&#21040;&#26632;&#20013;
+					left = stack.pop();
+					right = new VarExpression(String.valueOf(charArray[++i]));
+					stack.push(new AddExpression(left, right));
+					break;
+				case '-':
+					left = stack.pop();
+					right = new VarExpression(String.valueOf(charArray[++i]));
+					stack.push(new SubExpression(left, right));
+					break;
+				default: //&#20844;&#24335;&#20013;&#30340;&#21464;&#37327;
+					stack.push(new VarExpression(String.valueOf(charArray[i])));
+			}
+		}
+		//&#25226;&#36816;&#31639;&#32467;&#26524;&#25243;&#20986;&#26469;
+		this.expression = stack.pop();
+	}
+
+	//&#24320;&#22987;&#36816;&#31639;
+	public int run(HashMap<String, Integer> var) {
+		return this.expression.interpreter(var);
+	}
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/interpreter/Expression.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/interpreter/Expression.java
@@ -0,0 +1,8 @@
+package com.heibaiying.behavioral.interpreter;
+
+import java.util.HashMap;
+
+public abstract class Expression {
+	//&#35299;&#26512;&#20844;&#24335;&#21644;&#25968;&#20540;&#65292;&#20854;&#20013;var&#20013;&#30340;key&#20540;&#26159;&#20844;&#24335;&#20013;&#30340;&#21442;&#25968;&#65292;value&#20540;&#26159;&#20855;&#20307;&#30340;&#25968;&#23383;
+	public abstract int interpreter(HashMap<String, Integer> var);
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/interpreter/SubExpression.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/interpreter/SubExpression.java
@@ -0,0 +1,13 @@
+package com.heibaiying.behavioral.interpreter;
+
+import java.util.HashMap;
+
+public class SubExpression extends SymbolExpression {
+	public SubExpression(Expression left,Expression right){
+		super(left,right);
+	}
+	//&#24038;&#21491;&#20004;&#20010;&#34920;&#36798;&#24335;&#30456;&#20943;
+	public int interpreter(HashMap<String, Integer> var) {
+		return super.left.interpreter(var) - super.right.interpreter(var);
+	}
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/interpreter/SymbolExpression.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/interpreter/SymbolExpression.java
@@ -0,0 +1,12 @@
+package com.heibaiying.behavioral.interpreter;
+
+public abstract class SymbolExpression extends Expression {
+	protected Expression left;
+	protected Expression right;
+
+	//&#25152;&#26377;&#30340;&#35299;&#26512;&#20844;&#24335;&#37117;&#24212;&#21482;&#20851;&#24515;&#33258;&#24049;&#24038;&#21491;&#20004;&#20010;&#34920;&#36798;&#24335;&#30340;&#32467;&#26524;
+	public SymbolExpression(Expression left, Expression right) {
+		this.left = left;
+		this.right = right;
+	}
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/interpreter/VarExpression.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/interpreter/VarExpression.java
@@ -0,0 +1,17 @@
+package com.heibaiying.behavioral.interpreter;
+
+import java.util.HashMap;
+
+public class VarExpression extends Expression {
+
+	private String key;
+
+	public VarExpression(String key) {
+		this.key = key;
+	}
+
+	//&#20174;map&#20013;&#21462;&#20043;
+	public int interpreter(HashMap<String, Integer> var) {
+		return var.get(this.key);
+	}
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/interpreter/ZTest.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/interpreter/ZTest.java
@@ -0,0 +1,39 @@
+package com.heibaiying.behavioral.interpreter;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.HashMap;
+
+public class ZTest {
+	//&#36816;&#34892;&#22235;&#21017;&#36816;&#31639;
+	public static void main(String[] args) throws IOException {
+		String expStr = getExpStr();
+		//&#36171;&#20540;
+		HashMap<String, Integer> var = getValue(expStr);
+		Calculator cal = new Calculator(expStr);
+		System.out.println("&#36816;&#31639;&#32467;&#26524;&#20026;&#65306;" + expStr + "=" + cal.run(var));
+	}
+
+	//&#33719;&#24471;&#34920;&#36798;&#24335;
+	public static String getExpStr() throws IOException {
+		System.out.print("&#35831;&#36755;&#20837;&#34920;&#36798;&#24335;&#65306;");
+		return (new BufferedReader(new InputStreamReader(System.in))).readLine();
+	}
+
+	//&#33719;&#24471;&#20540;&#26144;&#23556;
+	public static HashMap<String, Integer> getValue(String exprStr) throws IOException {
+		HashMap<String, Integer> map = new HashMap<String, Integer>();
+		//&#35299;&#26512;&#26377;&#20960;&#20010;&#21442;&#25968;&#35201;&#20256;&#36882;
+		for (char ch : exprStr.toCharArray()) {
+			if (ch != '+' && ch != '-') {
+				//&#35299;&#20915;&#37325;&#22797;&#21442;&#25968;&#30340;&#38382;&#39064;
+				if (!map.containsKey(String.valueOf(ch))) {
+					String in = (new BufferedReader(new InputStreamReader(System.in))).readLine();
+					map.put(String.valueOf(ch), Integer.valueOf(in));
+				}
+			}
+		}
+		return map;
+	}
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/iterator/Book.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/iterator/Book.java
@@ -0,0 +1,13 @@
+package com.heibaiying.behavioral.iterator;
+
+import lombok.Data;
+
+@Data
+public class Book {
+	private String name;
+
+	public Book(String name) {
+		this.name = name;
+	}
+
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/iterator/BookIterator.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/iterator/BookIterator.java
@@ -0,0 +1,23 @@
+package com.heibaiying.behavioral.iterator;
+
+import java.util.List;
+
+public class BookIterator implements Iterator<Book> {
+
+	private List<Book> bookList;
+	private int position = 0;
+
+	public BookIterator(List<Book> bookList) {
+		this.bookList = bookList;
+	}
+
+	@Override
+	public Book next() {
+		return bookList.get(position++);
+	}
+
+	@Override
+	public boolean hasNext() {
+		return position < bookList.size();
+	}
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/iterator/Bookshelf.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/iterator/Bookshelf.java
@@ -0,0 +1,13 @@
+package com.heibaiying.behavioral.iterator;
+
+/**
+ * &#20070;&#26588;
+ */
+public interface Bookshelf {
+
+	void addBook(Book book);
+
+	void removeBook(Book book);
+
+	BookIterator iterator();
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/iterator/BookshelfImpl.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/iterator/BookshelfImpl.java
@@ -0,0 +1,27 @@
+package com.heibaiying.behavioral.iterator;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * &#20070;&#26588;
+ */
+public class BookshelfImpl implements Bookshelf {
+
+	private List<Book> bookList = new ArrayList<>();
+
+	@Override
+	public void addBook(Book book) {
+		bookList.add(book);
+	}
+
+	@Override
+	public void removeBook(Book book) {
+		bookList.remove(book);
+	}
+
+	@Override
+	public BookIterator iterator() {
+		return new BookIterator(bookList);
+	}
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/iterator/Iterator.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/iterator/Iterator.java
@@ -0,0 +1,6 @@
+package com.heibaiying.behavioral.iterator;
+
+public interface Iterator<E> {
+	E next();
+	boolean hasNext();
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/iterator/ZTest.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/iterator/ZTest.java
@@ -0,0 +1,14 @@
+package com.heibaiying.behavioral.iterator;
+
+public class ZTest {
+	public static void main(String[] args) {
+		BookshelfImpl bookshelf = new BookshelfImpl();
+		bookshelf.addBook(new Book("Java&#20070;&#31821;"));
+		bookshelf.addBook(new Book("Python&#20070;&#31821;"));
+		bookshelf.addBook(new Book("Go&#20070;&#31821;"));
+		BookIterator iterator = bookshelf.iterator();
+		while (iterator.hasNext()) {
+			System.out.println(iterator.next());
+		}
+	}
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/observer/Business.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/observer/Business.java
@@ -0,0 +1,26 @@
+package com.heibaiying.behavioral.observer;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Business implements Observable {
+
+	private List<Observer> observerList = new ArrayList<>();
+
+	@Override
+	public void addObserver(Observer observer) {
+		observerList.add(observer);
+	}
+
+	@Override
+	public void removeObserver(Observer observer) {
+		observerList.remove(observer);
+	}
+
+	@Override
+	public void notifyObservers(String message) {
+		for (Observer observer : observerList) {
+			observer.receive(message);
+		}
+	}
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/observer/Observable.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/observer/Observable.java
@@ -0,0 +1,10 @@
+package com.heibaiying.behavioral.observer;
+
+public interface Observable {
+
+	void addObserver(Observer observer);
+
+	void removeObserver(Observer observer);
+
+	void notifyObservers(String message);
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/observer/Observer.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/observer/Observer.java
@@ -0,0 +1,5 @@
+package com.heibaiying.behavioral.observer;
+
+public interface Observer {
+	void receive(String message);
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/observer/User.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/observer/User.java
@@ -0,0 +1,18 @@
+package com.heibaiying.behavioral.observer;
+
+import lombok.Data;
+
+@Data
+public class User implements Observer {
+
+	private String name;
+
+	public User(String name) {
+		this.name = name;
+	}
+
+	@Override
+	public void receive(String message) {
+		System.out.println(getName() + "&#25910;&#21040;&#28040;&#24687;&#65306;" + message);
+	}
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/observer/ZTest.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/observer/ZTest.java
@@ -0,0 +1,13 @@
+package com.heibaiying.behavioral.observer;
+
+public class ZTest {
+
+	public static void main(String[] args) {
+		Business business = new Business();
+		business.addObserver(new User("&#29992;&#25143;1"));
+		business.addObserver(new User("&#29992;&#25143;2"));
+		business.addObserver(new User("&#29992;&#25143;3"));
+		business.notifyObservers("&#21830;&#21697;&#20419;&#38144;&#36890;&#30693;");
+	}
+
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/strategy/BonusStrategy.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/strategy/BonusStrategy.java
@@ -0,0 +1,8 @@
+package com.heibaiying.behavioral.strategy;
+
+public class BonusStrategy implements Strategy {
+	@Override
+	public void execute() {
+		System.out.println("&#22870;&#37329;&#28608;&#21169;");
+	}
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/strategy/Company.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/strategy/Company.java
@@ -0,0 +1,15 @@
+package com.heibaiying.behavioral.strategy;
+
+public class Company {
+
+	private Strategy strategy;
+
+	public Company setStrategy(Strategy strategy) {
+		this.strategy = strategy;
+		return this;
+	}
+
+	public void execute() {
+		strategy.execute();
+	}
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/strategy/Strategy.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/strategy/Strategy.java
@@ -0,0 +1,5 @@
+package com.heibaiying.behavioral.strategy;
+
+public interface Strategy {
+	void execute();
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/strategy/TravelStrategy.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/strategy/TravelStrategy.java
@@ -0,0 +1,8 @@
+package com.heibaiying.behavioral.strategy;
+
+public class TravelStrategy implements Strategy {
+	@Override
+	public void execute() {
+		System.out.println("&#38598;&#20307;&#26053;&#28216;");
+	}
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/strategy/WorkOvertimeStrategy.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/strategy/WorkOvertimeStrategy.java
@@ -0,0 +1,8 @@
+package com.heibaiying.behavioral.strategy;
+
+public class WorkOvertimeStrategy implements Strategy {
+	@Override
+	public void execute() {
+		System.out.println("&#22870;&#21169;&#21152;&#29677;");
+	}
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/strategy/ZTest.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/strategy/ZTest.java
@@ -0,0 +1,16 @@
+package com.heibaiying.behavioral.strategy;
+
+public class ZTest {
+	public static void main(String[] args) {
+		// &#33829;&#19994;&#39069;
+		int turnover = Integer.parseInt(args[0]);
+		Company company = new Company();
+		if (turnover > 1000) {
+			company.setStrategy(new BonusStrategy()).execute();
+		} else if (turnover > 100) {
+			company.setStrategy(new TravelStrategy()).execute();
+		} else {
+			company.setStrategy(new WorkOvertimeStrategy()).execute();
+		}
+	}
+}
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/template/OlderPhone.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/template/OlderPhone.java
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/template/Phone.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/template/Phone.java
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/template/SmartPhone.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/template/SmartPhone.java
diff --git a/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/template/ZTest.java b/code/Java/design-pattern/src/main/java/com/heibaiying/behavioral/template/ZTest.java
