Merge branch 'master' of http://git.innoschool.org:3000/ZhangJinxuan/java

Article.java

@@ -0,0 +1,70 @@
+package com.example.datacollect.model;
+import java.util.Date 
+public class Article {
+    private String title;
+    private String url;
+    private String content;
+    private String author;
+<<<<<<< HEAD
+    private Date publishDate;
+=======
+    private String Date publishDate;
+>>>>>>> 81e72ba458591eeb2c3e547f9801e93be758f6eb
+    public Article(String title, String url, String content,String author,Date publishDate) {
+        this.title = title;
+        this.url = url;
+        this.content = content;
+        this.author = author;
+        this.publishDate= publishDate;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public String getUrl() {
+        return url;
+    }
+
+    public void setUrl(String url) {
+        this.url = url;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public void setContent(String content) {
+        this.content = content;
+    }
+    public String getAuthor(){
+        return author;
+    }
+    public void setAuthor(String author){
+        this.author= author;
+    }
+<<<<<<< HEAD
+    public Date getPublishDate() {
+        return publishDate;
+    }
+    public void setPublishDate(Date publishDate) {
+        this.publishDate = publishDate;
+    }
+=======
+>>>>>>> 81e72ba458591eeb2c3e547f9801e93be758f6eb
+    @Override
+    public String toString() {
+        return "Article{"
+                + "title='" + title + '\''
+                + ", url='" + url + '\''
+                + '}';
+    }
+<<<<<<< HEAD
+}
+=======
+}
+>>>>>>> 81e72ba458591eeb2c3e547f9801e93be758f6eb

HistoryCommmand.java

@@ -0,0 +1,17 @@
+import java.util.ArrayList;
+import java.util.List;
+
+public class HistoryCommand {
+    // 存储所有输入过的命令
+    private final List<String> commandHistory = new ArrayList<>();
+
+    // 添加命令
+    public void addCommand(String cmd) {
+        commandHistory.add(cmd);
+    }
+
+    // 获取全部历史
+    public List<String> getHistory() {
+        return new ArrayList<>(commandHistory); // 防御性拷贝，避免外部修改
+    }
+}

ScoreAverge.java

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+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.IOException;
+
+public class ScoreCalculator {
+    public static void main(String[] args) {
+        String fileName = "scores.txt";
+        int sum = 0;
+        int count = 0;
+
+        // try-with-resources 自动关闭流，无需手动写 br.close()
+        try (BufferedReader br = new BufferedReader(new FileReader(fileName))) {
+            String line;
+            while ((line = br.readLine()) != null) {
+                // 去除字符串前后空格，避免空行或空格影响解析
+                line = line.trim();
+                if (line.isEmpty()) {
+                    continue; // 跳过空行
+                }
+
+                try {
+                    // 解析成绩为整数
+                    int score = Integer.parseInt(line);
+                    sum += score;
+                    count++;
+                } catch (NumberFormatException e) {
+                    // 数字格式错误处理
+                    System.err.println("警告：无法解析成绩 '" + line + "'，跳过该数据");
+                }
+            }
+
+            // 计算平均分
+            if (count > 0) {
+                double average = (double) sum / count;
+                System.out.println("平均分：" + average);
+            } else {
+                System.out.println("文件中没有有效成绩数据");
+            }
+
+        } catch (IOException e) {
+            // 文件不存在、读取错误处理
+            System.err.println("读取文件时发生错误：" + e.getMessage());
+            e.printStackTrace();
+        }
+    }
+}

动物叫声系统.java

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+abstract class Animal {
+    // 抽象方法：动物叫声
+    public abstract void makeSound();
+}
+
+// 2. Swimmable 接口
+interface Swimmable {
+    // 游泳方法
+    void swim();
+}
+
+// 3. Dog 类：继承 Animal，实现 Swimmable
+class Dog extends Animal implements Swimmable {
+    @Override
+    public void makeSound() {
+        System.out.println("小狗汪汪叫：汪汪汪！");
+    }
+
+    @Override
+    public void swim() {
+        System.out.println("小狗在水里狗刨式游泳！");
+    }
+}
+
+// 4. Cat 类：继承 Animal，不实现 Swimmable
+class Cat extends Animal {
+    @Override
+    public void makeSound() {
+        System.out.println("小猫喵喵叫：喵喵喵！");
+    }
+}

测试.java

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+public class AnimalTest {
+    public static void main(String[] args) {
+        // 多态方式创建对象
+        Animal dog = new Dog();
+        Animal cat = new Cat();
+
+        // 调用 makeSound 方法（多态体现）
+        System.out.println("=== 动物叫声测试 ===");
+        dog.makeSound();
+        cat.makeSound();
+
+        // 测试 Swimable 接口（Dog 能游泳，Cat 不能）
+        System.out.println("\n=== 游泳能力测试 ===");
+        if (dog instanceof Swimmable) {
+            ((Swimmable) dog).swim();
+        }
+        if (cat instanceof Swimmable) {
+            ((Swimmable) cat).swim();
+        } else {
+            System.out.println("小猫不会游泳哦！");
+        }
+    }
+}