AuthMiddleware.java

@@ -1,27 +0,0 @@
-package middleware;
-
-/**
- * 认证中间件装饰器
- * 具体装饰器类，用于验证请求的认证信息
- */
-public class AuthMiddleware extends MiddlewareDecorator {
-    
-    public AuthMiddleware(HttpRequestHandler decoratedHandler) {
-        super(decoratedHandler);
-    }
-    
-    @Override
-    public HttpResponse handle(HttpRequest request) {
-        // 简单的认证检查逻辑
-        String authHeader = request.getHeaders();
-        if (authHeader != null && authHeader.contains("Authorization: Bearer token123")) {
-            System.out.println("Authentication successful");
-            return super.handle(request);
-        } else {
-            HttpResponse response = new HttpResponse();
-            response.setStatusCode(401);
-            response.setBody("Unauthorized");
-            return response;
-        }
-    }
-}

BasicHttpRequestHandler.java

@@ -1,15 +0,0 @@
-package middleware;
-
-/**
- * 基本的HTTP请求处理器实现
- * 装饰器模式中的具体组件类
- */
-public class BasicHttpRequestHandler implements HttpRequestHandler {
-    @Override
-    public HttpResponse handle(HttpRequest request) {
-        HttpResponse response = new HttpResponse();
-        response.setBody("Hello from Basic Handler: " + request.getPath());
-        response.setHeaders("Content-Type: text/plain");
-        return response;
-    }
-}

CORSMiddleware.java

@@ -1,23 +0,0 @@
-package middleware;
-
-/**
- * CORS中间件装饰器
- * 具体装饰器类，用于处理跨域资源共享请求
- */
-public class CORSMiddleware extends MiddlewareDecorator {
-    
-    public CORSMiddleware(HttpRequestHandler decoratedHandler) {
-        super(decoratedHandler);
-    }
-    
-    @Override
-    public HttpResponse handle(HttpRequest request) {
-        HttpResponse response = super.handle(request);
-        
-        // 添加CORS头信息
-        String existingHeaders = response.getHeaders() != null ? response.getHeaders() + "\n" : "";
-        response.setHeaders(existingHeaders + "Access-Control-Allow-Origin: *\nAccess-Control-Allow-Methods: GET, POST, PUT, DELETE\nAccess-Control-Allow-Headers: *");
-        
-        return response;
-    }
-}

Circle.java

@@ -1,80 +0,0 @@
-package challenge;
-
-import basic.Shape;
-import advanced.Resizable;
-
-/**
- * 圆形类，实现Shape接口和Resizable接口
- */
-public class Circle implements Shape, Resizable {
-    private String color;
-    private double radius;
-    
-    /**
-     * 构造方法
-     * @param color 圆形的颜色
-     * @param radius 圆形的半径
-     */
-    public Circle(String color, double radius) {
-        this.color = color;
-        this.radius = radius;
-    }
-    
-    @Override
-    public String getColor() {
-        return color;
-    }
-    
-    @Override
-    public double getArea() {
-        return Math.PI * radius * radius;
-    }
-    
-    @Override
-    public void display() {
-        System.out.println("Circle [color=" + color + ", radius=" + radius + ", area=" + getArea() + "]");
-    }
-    
-    @Override
-    public void enlarge(double factor) {
-        if (factor > 0) {
-            this.radius *= factor;
-        }
-    }
-    
-    @Override
-    public void shrink(double factor) {
-        if (factor > 0 && factor < 1) {
-            this.radius *= factor;
-        }
-    }
-    
-    @Override
-    public String getSizeInfo() {
-        return "Circle with radius: " + radius + ", area: " + getArea();
-    }
-    
-    /**
-     * 获取半径
-     * @return 半径
-     */
-    public double getRadius() {
-        return radius;
-    }
-    
-    /**
-     * 设置半径
-     * @param radius 新的半径
-     */
-    public void setRadius(double radius) {
-        this.radius = radius;
-    }
-    
-    /**
-     * 设置颜色
-     * @param color 新的颜色
-     */
-    public void setColor(String color) {
-        this.color = color;
-    }
-}

CircleToEllipseConverter.java

@@ -1,60 +0,0 @@
-package challenge;
-
-import basic.Shape;
-
-/**
- * 圆形到椭圆形的转换器，实现ShapeConverter接口
- */
-public class CircleToEllipseConverter implements ShapeConverter {
-    private double stretchFactor; // 拉伸因子，用于确定椭圆的长半轴
-    
-    /**
-     * 构造方法
-     * @param stretchFactor 拉伸因子，大于1时会将圆形拉伸成椭圆形
-     */
-    public CircleToEllipseConverter(double stretchFactor) {
-        this.stretchFactor = Math.max(stretchFactor, 1.0); // 确保拉伸因子至少为1
-    }
-    
-    @Override
-    public Shape convert(Shape sourceShape) {
-        if (!canConvert(sourceShape)) {
-            return null;
-        }
-        
-        Circle circle = (Circle) sourceShape;
-        double radius = circle.getRadius();
-        
-        // 将圆形转换为椭圆形：保持颜色不变，半径作为短半轴，拉伸后的半径作为长半轴
-        double semiMinorAxis = radius;
-        double semiMajorAxis = radius * stretchFactor;
-        
-        return new Ellipse(circle.getColor(), semiMajorAxis, semiMinorAxis);
-    }
-    
-    @Override
-    public boolean canConvert(Shape sourceShape) {
-        return sourceShape instanceof Circle;
-    }
-    
-    @Override
-    public String getConversionDescription() {
-        return "将圆形转换为椭圆形，拉伸因子为：" + stretchFactor;
-    }
-    
-    /**
-     * 获取拉伸因子
-     * @return 拉伸因子
-     */
-    public double getStretchFactor() {
-        return stretchFactor;
-    }
-    
-    /**
-     * 设置拉伸因子
-     * @param stretchFactor 新的拉伸因子
-     */
-    public void setStretchFactor(double stretchFactor) {
-        this.stretchFactor = Math.max(stretchFactor, 1.0);
-    }
-}

ClassRoom.java

@@ -1,39 +0,0 @@
-package advanced;
-
-public class ClassRoom {
-    private String id;
-    private String name;
-    private Teacher teacher;
-    
-    public ClassRoom() {
-    }
-    
-    public ClassRoom(String id, String name) {
-        this.id = id;
-        this.name = name;
-    }
-    
-    public void setTeacher(Teacher teacher) {
-        this.teacher = teacher;
-    }
-    
-    public String getId() {
-        return id;
-    }
-    
-    public void setId(String id) {
-        this.id = id;
-    }
-    
-    public String getName() {
-        return name;
-    }
-    
-    public void setName(String name) {
-        this.name = name;
-    }
-    
-    public Teacher getTeacher() {
-        return teacher;
-    }
-}

CompositeShape.java

@@ -1,143 +0,0 @@
-package challenge;
-
-import basic.Shape;
-import advanced.Resizable;
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * 复合图形类，实现Shape接口和Resizable接口，用于组合多个图形
- */
-public class CompositeShape implements Shape, Resizable {
-    private String color;
-    private String name;
-    private List<Shape> shapes;
-    
-    /**
-     * 构造方法
-     * @param name 复合图形的名称
-     * @param color 复合图形的颜色
-     */
-    public CompositeShape(String name, String color) {
-        this.name = name;
-        this.color = color;
-        this.shapes = new ArrayList<>();
-    }
-    
-    /**
-     * 添加子图形
-     * @param shape 要添加的图形
-     */
-    public void addShape(Shape shape) {
-        if (shape != null) {
-            shapes.add(shape);
-        }
-    }
-    
-    /**
-     * 移除子图形
-     * @param shape 要移除的图形
-     * @return 如果移除成功则返回true，否则返回false
-     */
-    public boolean removeShape(Shape shape) {
-        return shapes.remove(shape);
-    }
-    
-    /**
-     * 移除所有子图形
-     */
-    public void clearShapes() {
-        shapes.clear();
-    }
-    
-    /**
-     * 获取子图形列表
-     * @return 子图形列表
-     */
-    public List<Shape> getShapes() {
-        return new ArrayList<>(shapes); // 返回副本，防止外部修改
-    }
-    
-    @Override
-    public String getColor() {
-        return color;
-    }
-    
-    @Override
-    public double getArea() {
-        double totalArea = 0.0;
-        for (Shape shape : shapes) {
-            totalArea += shape.getArea();
-        }
-        return totalArea;
-    }
-    
-    @Override
-    public void display() {
-        System.out.println("CompositeShape [name=" + name + ", color=" + color + ", totalShapes=" + shapes.size() + ", totalArea=" + getArea() + "]");
-        System.out.println("  子图形列表:");
-        for (int i = 0; i < shapes.size(); i++) {
-            System.out.print("  " + (i + 1) + ". ");
-            shapes.get(i).display();
-        }
-    }
-    
-    @Override
-    public void enlarge(double factor) {
-        if (factor > 0) {
-            for (Shape shape : shapes) {
-                if (shape instanceof Resizable) {
-                    ((Resizable) shape).enlarge(factor);
-                }
-            }
-        }
-    }
-    
-    @Override
-    public void shrink(double factor) {
-        if (factor > 0 && factor < 1) {
-            for (Shape shape : shapes) {
-                if (shape instanceof Resizable) {
-                    ((Resizable) shape).shrink(factor);
-                }
-            }
-        }
-    }
-    
-    @Override
-    public String getSizeInfo() {
-        return "CompositeShape '" + name + "' with " + shapes.size() + " shapes, total area: " + getArea();
-    }
-    
-    /**
-     * 获取复合图形的名称
-     * @return 名称
-     */
-    public String getName() {
-        return name;
-    }
-    
-    /**
-     * 设置复合图形的名称
-     * @param name 新的名称
-     */
-    public void setName(String name) {
-        this.name = name;
-    }
-    
-    /**
-     * 设置颜色
-     * @param color 新的颜色
-     */
-    public void setColor(String color) {
-        this.color = color;
-    }
-    
-    /**
-     * 获取子图形的数量
-     * @return 子图形数量
-     */
-    public int getShapeCount() {
-        return shapes.size();
-    }
-}

Course.java

@@ -1,59 +0,0 @@
-package advanced;
-
-public class AdvancedCourse {
-    private int id;
-    private String name;
-    private int credit;
-    private java.util.List<AdvancedCourse> prerequisiteCourses;
-    
-    public AdvancedCourse() {
-        this.prerequisiteCourses = new java.util.ArrayList<>();
-    }
-    
-    public AdvancedCourse(int id, String name, int credit) {
-        this.id = id;
-        this.name = name;
-        this.credit = credit;
-        this.prerequisiteCourses = new java.util.ArrayList<>();
-    }
-    
-    public void addPrerequisiteCourse(AdvancedCourse course) {
-        prerequisiteCourses.add(course);
-    }
-    
-    public void removePrerequisiteCourse(AdvancedCourse course) {
-        prerequisiteCourses.remove(course);
-    }
-    
-    public int getId() {
-        return id;
-    }
-    
-    public void setId(int id) {
-        this.id = id;
-    }
-    
-    public String getName() {
-        return name;
-    }
-    
-    public void setName(String name) {
-        this.name = name;
-    }
-    
-    public int getCredit() {
-        return credit;
-    }
-    
-    public void setCredit(int credit) {
-        this.credit = credit;
-    }
-    
-    public java.util.List<AdvancedCourse> getPrerequisiteCourses() {
-        return prerequisiteCourses;
-    }
-    
-    public void setPrerequisiteCourses(java.util.List<AdvancedCourse> prerequisiteCourses) {
-        this.prerequisiteCourses = prerequisiteCourses;
-    }
-}

Ellipse.java

@@ -1,101 +0,0 @@
-package challenge;
-
-import basic.Shape;
-import advanced.Resizable;
-
-/**
- * 椭圆形类，实现Shape接口和Resizable接口
- */
-public class Ellipse implements Shape, Resizable {
-    private String color;
-    private double semiMajorAxis; // 长半轴
-    private double semiMinorAxis; // 短半轴
-    
-    /**
-     * 构造方法
-     * @param color 椭圆形的颜色
-     * @param semiMajorAxis 长半轴
-     * @param semiMinorAxis 短半轴
-     */
-    public Ellipse(String color, double semiMajorAxis, double semiMinorAxis) {
-        this.color = color;
-        this.semiMajorAxis = Math.max(semiMajorAxis, semiMinorAxis); // 确保长半轴不小于短半轴
-        this.semiMinorAxis = Math.min(semiMajorAxis, semiMinorAxis);
-    }
-    
-    @Override
-    public String getColor() {
-        return color;
-    }
-    
-    @Override
-    public double getArea() {
-        return Math.PI * semiMajorAxis * semiMinorAxis;
-    }
-    
-    @Override
-    public void display() {
-        System.out.println("Ellipse [color=" + color + ", semiMajorAxis=" + semiMajorAxis + ", semiMinorAxis=" + semiMinorAxis + ", area=" + getArea() + "]");
-    }
-    
-    @Override
-    public void enlarge(double factor) {
-        if (factor > 0) {
-            this.semiMajorAxis *= factor;
-            this.semiMinorAxis *= factor;
-        }
-    }
-    
-    @Override
-    public void shrink(double factor) {
-        if (factor > 0 && factor < 1) {
-            this.semiMajorAxis *= factor;
-            this.semiMinorAxis *= factor;
-        }
-    }
-    
-    @Override
-    public String getSizeInfo() {
-        return "Ellipse with semi-major axis: " + semiMajorAxis + ", semi-minor axis: " + semiMinorAxis + ", area: " + getArea();
-    }
-    
-    /**
-     * 获取长半轴
-     * @return 长半轴
-     */
-    public double getSemiMajorAxis() {
-        return semiMajorAxis;
-    }
-    
-    /**
-     * 设置长半轴
-     * @param semiMajorAxis 新的长半轴
-     */
-    public void setSemiMajorAxis(double semiMajorAxis) {
-        this.semiMajorAxis = semiMajorAxis;
-    }
-    
-    /**
-     * 获取短半轴
-     * @return 短半轴
-     */
-    public double getSemiMinorAxis() {
-        return semiMinorAxis;
-    }
-    
-    /**
-     * 设置短半轴
-     * @param semiMinorAxis 新的短半轴
-     */
-    public void setSemiMinorAxis(double semiMinorAxis) {
-        this.semiMinorAxis = semiMinorAxis;
-    }
-    
-    /**
-     * 设置颜色
-     * @param color 新的颜色
-     */
-    public void setColor(String color) {
-        this.color = color;
-    }
-}

HttpRequest.java

@@ -1,40 +0,0 @@
-package middleware;
-
-/**
- * HTTP请求对象
- */
-public class HttpRequest {
-    private String path;
-    private String method;
-    private String headers;
-    private String body;
-    
-    public HttpRequest(String path, String method) {
-        this.path = path;
-        this.method = method;
-    }
-    
-    public String getPath() {
-        return path;
-    }
-    
-    public String getMethod() {
-        return method;
-    }
-    
-    public void setHeaders(String headers) {
-        this.headers = headers;
-    }
-    
-    public String getHeaders() {
-        return headers;
-    }
-    
-    public void setBody(String body) {
-        this.body = body;
-    }
-    
-    public String getBody() {
-        return body;
-    }
-}

HttpRequestHandler.java

@@ -1,14 +0,0 @@
-package middleware;
-
-/**
- * HTTP请求处理器接口
- * 装饰器模式的核心组件，定义了处理HTTP请求的方法
- */
-public interface HttpRequestHandler {
-    /**
-     * 处理HTTP请求并返回响应
-     * @param request HTTP请求对象
-     * @return HTTP响应对象
-     */
-    HttpResponse handle(HttpRequest request);
-}

HttpResponse.java

@@ -1,38 +0,0 @@
-package middleware;
-
-/**
- * HTTP响应对象
- */
-public class HttpResponse {
-    private int statusCode;
-    private String headers;
-    private String body;
-    
-    public HttpResponse() {
-        this.statusCode = 200;
-    }
-    
-    public int getStatusCode() {
-        return statusCode;
-    }
-    
-    public void setStatusCode(int statusCode) {
-        this.statusCode = statusCode;
-    }
-    
-    public void setHeaders(String headers) {
-        this.headers = headers;
-    }
-    
-    public String getHeaders() {
-        return headers;
-    }
-    
-    public void setBody(String body) {
-        this.body = body;
-    }
-    
-    public String getBody() {
-        return body;
-    }
-}

LoggingMiddleware.java

@@ -1,20 +0,0 @@
-package middleware;
-
-/**
- * 日志中间件装饰器
- * 具体装饰器类，用于记录请求信息
- */
-public class LoggingMiddleware extends MiddlewareDecorator {
-    
-    public LoggingMiddleware(HttpRequestHandler decoratedHandler) {
-        super(decoratedHandler);
-    }
-    
-    @Override
-    public HttpResponse handle(HttpRequest request) {
-        System.out.println("Logging request: " + request.getMethod() + " " + request.getPath());
-        HttpResponse response = super.handle(request);
-        System.out.println("Logging response status: " + response.getStatusCode());
-        return response;
-    }
-}

MiddlewareDecorator.java

@@ -1,18 +0,0 @@
-package middleware;
-
-/**
- * 中间件装饰器抽象类
- * 装饰器模式中的装饰器类，实现了HttpRequestHandler接口并持有一个HttpRequestHandler引用
- */
-public abstract class MiddlewareDecorator implements HttpRequestHandler {
-    protected HttpRequestHandler decoratedHandler;
-    
-    public MiddlewareDecorator(HttpRequestHandler decoratedHandler) {
-        this.decoratedHandler = decoratedHandler;
-    }
-    
-    @Override
-    public HttpResponse handle(HttpRequest request) {
-        return decoratedHandler.handle(request);
-    }
-}

Parent.java

@@ -1,49 +0,0 @@
-package advanced;
-
-public class Parent {
-    private String id;
-    private String name;
-    private java.util.List<basic.Student> children;
-    
-    public Parent() {
-        this.children = new java.util.ArrayList<>();
-    }
-    
-    public Parent(String id, String name) {
-        this.id = id;
-        this.name = name;
-        this.children = new java.util.ArrayList<>();
-    }
-    
-    public void addChild(basic.Student student) {
-        children.add(student);
-    }
-    
-    public void removeChild(basic.Student student) {
-        children.remove(student);
-    }
-    
-    public String getId() {
-        return id;
-    }
-    
-    public void setId(String id) {
-        this.id = id;
-    }
-    
-    public String getName() {
-        return name;
-    }
-    
-    public void setName(String name) {
-        this.name = name;
-    }
-    
-    public java.util.List<basic.Student> getChildren() {
-        return children;
-    }
-    
-    public void setChildren(java.util.List<basic.Student> children) {
-        this.children = children;
-    }
-}

ShapeConversionSystem.java

@@ -1,109 +0,0 @@
-package challenge;
-
-import basic.Shape;
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * 图形转换系统，用于管理和执行图形转换
- */
-public class ShapeConversionSystem {
-    private List<ShapeConverter> converters;
-    
-    /**
-     * 构造方法
-     */
-    public ShapeConversionSystem() {
-        this.converters = new ArrayList<>();
-    }
-    
-    /**
-     * 添加图形转换器
-     * @param converter 要添加的转换器
-     */
-    public void addConverter(ShapeConverter converter) {
-        if (converter != null && !converters.contains(converter)) {
-            converters.add(converter);
-        }
-    }
-    
-    /**
-     * 移除图形转换器
-     * @param converter 要移除的转换器
-     * @return 如果移除成功则返回true，否则返回false
-     */
-    public boolean removeConverter(ShapeConverter converter) {
-        return converters.remove(converter);
-    }
-    
-    /**
-     * 查找可以转换指定图形的转换器
-     * @param sourceShape 源图形
-     * @return 可以转换该图形的转换器列表
-     */
-    public List<ShapeConverter> findSuitableConverters(Shape sourceShape) {
-        List<ShapeConverter> suitableConverters = new ArrayList<>();
-        for (ShapeConverter converter : converters) {
-            if (converter.canConvert(sourceShape)) {
-                suitableConverters.add(converter);
-            }
-        }
-        return suitableConverters;
-    }
-    
-    /**
-     * 使用指定的转换器转换图形
-     * @param converter 要使用的转换器
-     * @param sourceShape 源图形
-     * @return 转换后的图形，如果转换失败则返回null
-     */
-    public Shape convert(ShapeConverter converter, Shape sourceShape) {
-        if (converter != null && converter.canConvert(sourceShape)) {
-            return converter.convert(sourceShape);
-        }
-        return null;
-    }
-    
-    /**
-     * 使用第一个合适的转换器转换图形
-     * @param sourceShape 源图形
-     * @return 转换后的图形，如果没有合适的转换器则返回null
-     */
-    public Shape convert(Shape sourceShape) {
-        List<ShapeConverter> suitableConverters = findSuitableConverters(sourceShape);
-        if (!suitableConverters.isEmpty()) {
-            return suitableConverters.get(0).convert(sourceShape);
-        }
-        return null;
-    }
-    
-    /**
-     * 获取所有可用的转换器
-     * @return 转换器列表
-     */
-    public List<ShapeConverter> getAllConverters() {
-        return new ArrayList<>(converters);
-    }
-    
-    /**
-     * 显示所有可用的转换器信息
-     */
-    public void displayAvailableConverters() {
-        System.out.println("===== 可用的图形转换器 =====");
-        if (converters.isEmpty()) {
-            System.out.println("暂无可用的转换器");
-        } else {
-            for (int i = 0; i < converters.size(); i++) {
-                System.out.println((i + 1) + ". " + converters.get(i).getConversionDescription());
-            }
-        }
-        System.out.println("=============================");
-    }
-    
-    /**
-     * 清空所有转换器
-     */
-    public void clearConverters() {
-        converters.clear();
-    }
-}

ShapeConverter.java

@@ -1,28 +0,0 @@
-package challenge;
-
-import basic.Shape;
-
-/**
- * 图形转换接口，定义图形之间的转换行为
- */
-public interface ShapeConverter {
-    /**
-     * 将源图形转换为目标图形
-     * @param sourceShape 源图形
-     * @return 转换后的目标图形，如果转换不支持则返回null
-     */
-    Shape convert(Shape sourceShape);
-    
-    /**
-     * 检查是否支持从源图形类型转换到目标图形类型
-     * @param sourceShape 源图形
-     * @return 如果支持转换则返回true，否则返回false
-     */
-    boolean canConvert(Shape sourceShape);
-    
-    /**
-     * 获取转换的描述信息
-     * @return 转换描述
-     */
-    String getConversionDescription();
-}

Student.java

@@ -1,50 +0,0 @@
-package advanced;
-
-public class AdvancedStudent {
-    private int id;
-    private String name;
-    private Parent parent;
-    private java.util.List<basic.Grade> grades;
-    
-    public AdvancedStudent() {
-        this.grades = new java.util.ArrayList<>();
-    }
-    
-    public AdvancedStudent(int id, String name) {
-        this.id = id;
-        this.name = name;
-        this.grades = new java.util.ArrayList<>();
-    }
-    
-    public int getId() {
-        return id;
-    }
-    
-    public void setId(int id) {
-        this.id = id;
-    }
-    
-    public String getName() {
-        return name;
-    }
-    
-    public void setName(String name) {
-        this.name = name;
-    }
-    
-    public Parent getParent() {
-        return parent;
-    }
-    
-    public void setParent(Parent parent) {
-        this.parent = parent;
-    }
-    
-    public java.util.List<basic.Grade> getGrades() {
-        return grades;
-    }
-    
-    public void setGrades(java.util.List<basic.Grade> grades) {
-        this.grades = grades;
-    }
-}

Teacher.java

@@ -1,49 +0,0 @@
-package advanced;
-
-public class Teacher {
-    private String id;
-    private String name;
-    private java.util.List<ClassRoom> classes;
-    
-    public Teacher() {
-        this.classes = new java.util.ArrayList<>();
-    }
-    
-    public Teacher(String id, String name) {
-        this.id = id;
-        this.name = name;
-        this.classes = new java.util.ArrayList<>();
-    }
-    
-    public void addClass(ClassRoom classRoom) {
-        classes.add(classRoom);
-    }
-    
-    public void removeClass(ClassRoom classRoom) {
-        classes.remove(classRoom);
-    }
-    
-    public String getId() {
-        return id;
-    }
-    
-    public void setId(String id) {
-        this.id = id;
-    }
-    
-    public String getName() {
-        return name;
-    }
-    
-    public void setName(String name) {
-        this.name = name;
-    }
-    
-    public java.util.List<ClassRoom> getClasses() {
-        return classes;
-    }
-    
-    public void setClasses(java.util.List<ClassRoom> classes) {
-        this.classes = classes;
-    }
-}