diff --git a/project/HTMLReportGenerator.java b/project/HTMLReportGenerator.java deleted file mode 100644 index 7a6855e..0000000 --- a/project/HTMLReportGenerator.java +++ /dev/null @@ -1,214 +0,0 @@ -package com.project.report; - -import com.project.analyzer.PostAnalyzer; -import com.project.model.PostInfo; - -import java.io.BufferedWriter; -import java.io.FileWriter; -import java.io.IOException; -import java.nio.charset.StandardCharsets; -import java.nio.file.Files; -import java.nio.file.Paths; -import java.time.LocalDateTime; -import java.time.format.DateTimeFormatter; -import java.util.Map; - -public class HTMLReportGenerator { - - private static final String OUTPUT_DIR = "d:\\java\\project\\reports"; - - public static void generateReport(PostAnalyzer analyzer) { - try { - Files.createDirectories(Paths.get(OUTPUT_DIR)); - - String timestamp = LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyyMMdd_HHmmss")); - String filename = "report_" + timestamp + ".html"; - String filepath = OUTPUT_DIR + "/" + filename; - - try (BufferedWriter writer = new BufferedWriter( - new FileWriter(filepath, StandardCharsets.UTF_8))) { - - writer.write(generateHTMLContent(analyzer)); - } - - System.out.println("HTML报告已生成: " + filepath); - - } catch (IOException e) { - System.err.println("生成HTML报告时出错: " + e.getMessage()); - } - } - - private static String generateHTMLContent(PostAnalyzer analyzer) { - StringBuilder html = new StringBuilder(); - - html.append("\n"); - html.append("\n"); - html.append("\n"); - html.append(" \n"); - html.append(" \n"); - html.append(" 图文帖子数据分析报告\n"); - html.append(" \n"); - html.append("\n"); - html.append("\n"); - html.append("
\n"); - html.append("

图文帖子数据分析报告

\n"); - html.append("

生成时间: ").append(LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"))).append("

\n"); - - html.append(generateSummarySection(analyzer)); - html.append(generateSentimentSection(analyzer)); - html.append(generateEngagementSection(analyzer)); - html.append(generateAuthorSection(analyzer)); - html.append(generateChartsSection()); - - html.append("
\n"); - html.append("\n"); - html.append(""); - - return html.toString(); - } - - private static String generateSummarySection(PostAnalyzer analyzer) { - StringBuilder section = new StringBuilder(); - - int totalPosts = analyzer.getPosts().size(); - double avgLikes = analyzer.getPosts().stream() - .mapToInt(PostInfo::getLikeCount) - .average() - .orElse(0); - - section.append("
\n"); - section.append("
\n"); - section.append("

").append(totalPosts).append("

\n"); - section.append("

帖子总数

\n"); - section.append("
\n"); - section.append("
\n"); - section.append("

").append(String.format("%.1f", avgLikes)).append("

\n"); - section.append("

平均点赞

\n"); - section.append("
\n"); - section.append("
\n"); - - section.append("
\n"); - section.append("

分析摘要

\n"); - section.append(" \n"); - section.append("
\n"); - - return section.toString(); - } - - private static String generateSentimentSection(PostAnalyzer analyzer) { - StringBuilder section = new StringBuilder(); - Map sentimentData = analyzer.getSentimentDistributionData(); - - section.append("
\n"); - section.append("

情感倾向分布分析

\n"); - section.append(" \n"); - section.append(" \n"); - - long total = sentimentData.values().stream().mapToLong(Long::longValue).sum(); - - for (Map.Entry entry : sentimentData.entrySet()) { - double percent = (entry.getValue() * 100.0) / total; - section.append(" \n"); - } - - section.append("
情感倾向帖子数量占比
").append(entry.getKey()) - .append("").append(entry.getValue()) - .append("").append(String.format("%.1f%%", percent)) - .append("
\n"); - section.append("
\n"); - - return section.toString(); - } - - private static String generateEngagementSection(PostAnalyzer analyzer) { - StringBuilder section = new StringBuilder(); - Map engagementData = analyzer.getEngagementData(); - - section.append("
\n"); - section.append("

互动指标分析

\n"); - section.append(" \n"); - section.append(" \n"); - - for (Map.Entry entry : engagementData.entrySet()) { - section.append(" \n"); - } - - section.append("
指标平均值
").append(entry.getKey()) - .append("").append(String.format("%.1f", entry.getValue())) - .append("
\n"); - section.append("
\n"); - - return section.toString(); - } - - private static String generateAuthorSection(PostAnalyzer analyzer) { - StringBuilder section = new StringBuilder(); - Map authorData = analyzer.getAuthorPostCount(); - - section.append("
\n"); - section.append("

热门作者排行TOP10

\n"); - section.append(" \n"); - section.append(" \n"); - - int rank = 1; - for (Map.Entry entry : authorData.entrySet()) { - section.append(" \n"); - } - - section.append("
排名作者帖子数量
").append(rank++) - .append("").append(entry.getKey()) - .append("").append(entry.getValue()) - .append("
\n"); - section.append("
\n"); - - return section.toString(); - } - - private static String generateChartsSection() { - StringBuilder section = new StringBuilder(); - - section.append("
\n"); - section.append("

数据可视化图表

\n"); - section.append("
\n"); - section.append("

情感倾向分布

\n"); - section.append(" \"情感倾向分布图\"\n"); - section.append("
\n"); - section.append("
\n"); - section.append("

互动指标分析

\n"); - section.append(" \"互动指标图\"\n"); - section.append("
\n"); - section.append("
\n"); - section.append("

热门作者排行

\n"); - section.append(" \"作者排行图\"\n"); - section.append("
\n"); - section.append("
\n"); - - return section.toString(); - } -} diff --git a/project/Main.java b/project/Main.java deleted file mode 100644 index 148520e..0000000 --- a/project/Main.java +++ /dev/null @@ -1,67 +0,0 @@ -package com.project; - -import com.project.analyzer.PostAnalyzer; -import com.project.chart.SimpleChartGenerator; -import com.project.model.PostInfo; -import com.project.reader.ExcelReader; -import com.project.report.HTMLReportGenerator; -import com.project.storage.DataStorage; -import com.project.util.DataCleaner; - -import java.util.List; -import java.util.Scanner; - -public class Main { - - public static void main(String[] args) { - System.out.println("========================================"); - System.out.println(" Java网络爬虫与数据分析系统"); - System.out.println("========================================\n"); - - String dataFilePath = "D:\\计量经济学\\计量实验资料及作业要求\\计量实验资料及作业要求\\图文帖子原始信息计量实验使用.xlsx"; - String outputDir = "d:\\java\\project\\data"; - int maxRows = 300; - - try { - System.out.println("开始读取本地数据文件..."); - System.out.println("数据文件: " + dataFilePath); - System.out.println("读取前 " + maxRows + " 条数据"); - - List rawPosts = ExcelReader.readExcelData(dataFilePath, maxRows); - - if (rawPosts.isEmpty()) { - System.out.println("未获取到任何数据，程序退出"); - return; - } - - System.out.println("\n开始数据清洗..."); - List cleanedPosts = DataCleaner.cleanPosts(rawPosts); - - System.out.println("\n保存数据到文件..."); - DataStorage.saveToCSV(cleanedPosts, outputDir); - DataStorage.saveToJSON(cleanedPosts, outputDir); - - System.out.println("\n开始数据分析..."); - PostAnalyzer analyzer = new PostAnalyzer(cleanedPosts); - analyzer.analyzeAll(); - - System.out.println("\n生成图表..."); - SimpleChartGenerator.generateAllCharts(analyzer); - - System.out.println("\n生成HTML报告..."); - HTMLReportGenerator.generateReport(analyzer); - - System.out.println("\n========================================"); - System.out.println(" 程序执行完成！"); - System.out.println("========================================"); - System.out.println("\n输出文件位置:"); - System.out.println("- 数据文件: " + outputDir); - System.out.println("- 图表文件: d:\\java\\project\\charts"); - System.out.println("- 报告文件: d:\\java\\project\\reports"); - - } catch (Exception e) { - System.err.println("程序执行出错: " + e.getMessage()); - e.printStackTrace(); - } - } -} diff --git a/project/PostAnalyzer.java b/project/PostAnalyzer.java deleted file mode 100644 index 76a5216..0000000 --- a/project/PostAnalyzer.java +++ /dev/null @@ -1,200 +0,0 @@ -package com.project.analyzer; - -import com.project.model.PostInfo; - -import java.util.*; -import java.util.stream.Collectors; - -public class PostAnalyzer { - - private final List posts; - - public PostAnalyzer(List posts) { - this.posts = posts; - } - - public List getPosts() { - return posts; - } - - public void analyzeAll() { - System.out.println("\n========== 数据分析报告 ==========\n"); - - analyzeSentimentDistribution(); - analyzeEngagementMetrics(); - analyzePopularAuthors(); - analyzeContentLength(); - analyzeTemporalTrends(); - - System.out.println("\n========== 分析完成 ==========\n"); - } - - public void analyzeSentimentDistribution() { - System.out.println("【情感倾向分布分析】"); - System.out.println("----------------------------------------"); - - Map sentimentCounts = posts.stream() - .collect(Collectors.groupingBy( - PostInfo::getSentiment, - Collectors.counting() - )); - - System.out.printf("%-20s %s%n", "情感倾向", "帖子数量"); - System.out.println("----------------------------------------"); - - sentimentCounts.entrySet().stream() - .sorted(Map.Entry.comparingByValue().reversed()) - .forEach(entry -> System.out.printf("%-20s %d%n", entry.getKey(), entry.getValue())); - - System.out.println(); - } - - public void analyzeEngagementMetrics() { - System.out.println("【互动指标分析】"); - System.out.println("----------------------------------------"); - - double avgLikes = posts.stream() - .mapToInt(PostInfo::getLikeCount) - .average() - .orElse(0); - - double avgComments = posts.stream() - .mapToInt(PostInfo::getCommentCount) - .average() - .orElse(0); - - double avgViews = posts.stream() - .mapToInt(PostInfo::getViewCount) - .average() - .orElse(0); - - System.out.printf("平均点赞数: %.1f%n", avgLikes); - System.out.printf("平均评论数: %.1f%n", avgComments); - System.out.printf("平均浏览量: %.1f%n", avgViews); - - System.out.println(); - } - - public void analyzePopularAuthors() { - System.out.println("【热门作者排行】"); - System.out.println("----------------------------------------"); - System.out.printf("%-30s %10s %10s %10s%n", "作者", "帖子数", "总点赞", "总评论"); - System.out.println("----------------------------------------"); - - Map> authorPosts = posts.stream() - .collect(Collectors.groupingBy(PostInfo::getAuthor)); - - authorPosts.entrySet().stream() - .sorted(Map.Entry.>comparingByValue((a, b) -> b.size() - a.size())) - .limit(10) - .forEach(entry -> { - String author = entry.getKey(); - List authorPostList = entry.getValue(); - int postCount = authorPostList.size(); - int totalLikes = authorPostList.stream().mapToInt(PostInfo::getLikeCount).sum(); - int totalComments = authorPostList.stream().mapToInt(PostInfo::getCommentCount).sum(); - - System.out.printf("%-30s %10d %10d %10d%n", - author.length() > 28 ? author.substring(0, 28) : author, - postCount, totalLikes, totalComments); - }); - - System.out.println(); - } - - public void analyzeContentLength() { - System.out.println("【内容长度分析】"); - System.out.println("----------------------------------------"); - - double avgLength = posts.stream() - .mapToInt(post -> post.getContent().length()) - .average() - .orElse(0); - - int maxLength = posts.stream() - .mapToInt(post -> post.getContent().length()) - .max() - .orElse(0); - - int minLength = posts.stream() - .mapToInt(post -> post.getContent().length()) - .min() - .orElse(0); - - System.out.printf("平均内容长度: %.1f 字符%n", avgLength); - System.out.printf("最长内容: %d 字符%n", maxLength); - System.out.printf("最短内容: %d 字符%n", minLength); - - System.out.println(); - } - - public void analyzeTemporalTrends() { - System.out.println("【时间趋势分析】"); - System.out.println("----------------------------------------"); - - Map monthlyPosts = posts.stream() - .filter(post -> post.getPostDate() != null) - .collect(Collectors.groupingBy( - post -> post.getPostDate().format(java.time.format.DateTimeFormatter.ofPattern("yyyy-MM")), - Collectors.counting() - )); - - System.out.printf("%-10s %s%n", "月份", "帖子数量"); - System.out.println("----------------------------------------"); - - monthlyPosts.entrySet().stream() - .sorted(Map.Entry.comparingByKey()) - .forEach(entry -> System.out.printf("%-10s %d%n", entry.getKey(), entry.getValue())); - - System.out.println(); - } - - public Map getSentimentDistributionData() { - return posts.stream() - .collect(Collectors.groupingBy( - PostInfo::getSentiment, - Collectors.counting() - )); - } - - public Map getEngagementData() { - Map engagementData = new LinkedHashMap<>(); - - double avgLikes = posts.stream() - .mapToInt(PostInfo::getLikeCount) - .average() - .orElse(0); - - double avgComments = posts.stream() - .mapToInt(PostInfo::getCommentCount) - .average() - .orElse(0); - - double avgViews = posts.stream() - .mapToInt(PostInfo::getViewCount) - .average() - .orElse(0); - - engagementData.put("点赞", avgLikes); - engagementData.put("评论", avgComments); - engagementData.put("浏览", avgViews); - - return engagementData; - } - - public Map getAuthorPostCount() { - return posts.stream() - .collect(Collectors.groupingBy( - PostInfo::getAuthor, - Collectors.summingInt(post -> 1) - )).entrySet().stream() - .sorted(Map.Entry.comparingByValue().reversed()) - .limit(10) - .collect(Collectors.toMap( - Map.Entry::getKey, - Map.Entry::getValue, - (e1, e2) -> e1, - LinkedHashMap::new - )); - } -} diff --git a/project/README.md b/project/README.md deleted file mode 100644 index a8687f1..0000000 --- a/project/README.md +++ /dev/null @@ -1,2 +0,0 @@ -# java - diff --git a/project/SimpleChartGenerator.java b/project/SimpleChartGenerator.java deleted file mode 100644 index 5a14324..0000000 --- a/project/SimpleChartGenerator.java +++ /dev/null @@ -1,165 +0,0 @@ -package com.project.chart; - -import com.project.analyzer.PostAnalyzer; - -import java.awt.*; -import java.awt.image.BufferedImage; -import java.io.File; -import java.io.IOException; -import java.nio.file.Files; -import java.nio.file.Paths; -import java.util.Map; -import javax.imageio.ImageIO; - -public class SimpleChartGenerator { - - private static final String OUTPUT_DIR = "d:\\java\\project\\charts"; - private static final int WIDTH = 800; - private static final int HEIGHT = 600; - - public static void generateAllCharts(PostAnalyzer analyzer) { - try { - Files.createDirectories(Paths.get(OUTPUT_DIR)); - - generateSentimentChart(analyzer); - generateEngagementChart(analyzer); - generateAuthorChart(analyzer); - - System.out.println("\n所有图表已生成，保存在: " + OUTPUT_DIR); - - } catch (IOException e) { - System.err.println("创建图表目录时出错: " + e.getMessage()); - } - } - - public static void generateSentimentChart(PostAnalyzer analyzer) { - Map data = analyzer.getSentimentDistributionData(); - - BufferedImage image = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB); - Graphics2D g2d = image.createGraphics(); - - g2d.setColor(Color.WHITE); - g2d.fillRect(0, 0, WIDTH, HEIGHT); - - g2d.setColor(Color.BLACK); - g2d.setFont(new Font("宋体", Font.BOLD, 24)); - g2d.drawString("情感倾向分布", 300, 40); - - int barWidth = 150; - int startX = 200; - int startY = 500; - int maxHeight = 400; - - long maxValue = data.values().stream().max(Long::compare).orElse(1L); - - int index = 0; - for (Map.Entry entry : data.entrySet()) { - int barHeight = (int) ((entry.getValue() * 1.0 / maxValue) * maxHeight); - - g2d.setColor(new Color(70, 130, 180)); - g2d.fillRect(startX + index * (barWidth + 50), startY - barHeight, barWidth, barHeight); - - g2d.setColor(Color.BLACK); - g2d.setFont(new Font("宋体", Font.PLAIN, 14)); - g2d.drawString(entry.getKey(), startX + index * (barWidth + 50) + 50, startY + 20); - g2d.drawString(String.valueOf(entry.getValue()), startX + index * (barWidth + 50) + 60, startY - barHeight - 5); - - index++; - } - - g2d.dispose(); - saveImage(image, "sentiment_distribution.png"); - } - - public static void generateEngagementChart(PostAnalyzer analyzer) { - Map data = analyzer.getEngagementData(); - - BufferedImage image = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB); - Graphics2D g2d = image.createGraphics(); - - g2d.setColor(Color.WHITE); - g2d.fillRect(0, 0, WIDTH, HEIGHT); - - g2d.setColor(Color.BLACK); - g2d.setFont(new Font("宋体", Font.BOLD, 24)); - g2d.drawString("互动指标分析", 300, 40); - - int barWidth = 150; - int startX = 200; - int startY = 500; - int maxHeight = 400; - - double maxValue = data.values().stream().max(Double::compare).orElse(1.0); - - int index = 0; - for (Map.Entry entry : data.entrySet()) { - int barHeight = (int) ((entry.getValue() / maxValue) * maxHeight); - - g2d.setColor(new Color(60, 179, 113)); - g2d.fillRect(startX + index * (barWidth + 50), startY - barHeight, barWidth, barHeight); - - g2d.setColor(Color.BLACK); - g2d.setFont(new Font("宋体", Font.PLAIN, 14)); - g2d.drawString(entry.getKey(), startX + index * (barWidth + 50) + 60, startY + 20); - g2d.drawString(String.format("%.1f", entry.getValue()), startX + index * (barWidth + 50) + 50, startY - barHeight - 5); - - index++; - } - - g2d.dispose(); - saveImage(image, "engagement_metrics.png"); - } - - public static void generateAuthorChart(PostAnalyzer analyzer) { - Map data = analyzer.getAuthorPostCount(); - - BufferedImage image = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB); - Graphics2D g2d = image.createGraphics(); - - g2d.setColor(Color.WHITE); - g2d.fillRect(0, 0, WIDTH, HEIGHT); - - g2d.setColor(Color.BLACK); - g2d.setFont(new Font("宋体", Font.BOLD, 24)); - g2d.drawString("热门作者排行TOP10", 280, 40); - - int barHeight = 35; - int startY = 80; - int startX = 200; - int maxWidth = 500; - - int maxValue = data.values().stream().max(Integer::compare).orElse(1); - - int index = 0; - for (Map.Entry entry : data.entrySet()) { - int barWidth = (int) ((entry.getValue() * 1.0 / maxValue) * maxWidth); - - g2d.setColor(new Color(255, 140, 0)); - g2d.fillRect(startX, startY + index * (barHeight + 10), barWidth, barHeight); - - g2d.setColor(Color.BLACK); - g2d.setFont(new Font("宋体", Font.PLAIN, 12)); - String author = entry.getKey(); - if (author.length() > 15) { - author = author.substring(0, 15) + "..."; - } - g2d.drawString(author, 50, startY + index * (barHeight + 10) + 23); - g2d.drawString(String.valueOf(entry.getValue()), startX + barWidth + 10, startY + index * (barHeight + 10) + 23); - - index++; - } - - g2d.dispose(); - saveImage(image, "author_ranking.png"); - } - - private static void saveImage(BufferedImage image, String filename) { - try { - File file = new File(OUTPUT_DIR, filename); - ImageIO.write(image, "PNG", file); - System.out.println("图表已保存: " + file.getAbsolutePath()); - } catch (IOException e) { - System.err.println("保存图表失败: " + e.getMessage()); - } - } -} diff --git a/w1/HelloWorld.java b/w1/HelloWorld.java deleted file mode 100644 index e69de29..0000000 diff --git a/w2/DataCleaner.java b/w2/DataCleaner.java deleted file mode 100644 index f0d23d6..0000000 --- a/w2/DataCleaner.java +++ /dev/null @@ -1,34 +0,0 @@ -public class DataCleaner { - public static void main(String[] args) { - int[] sensorData = {85, -5, 92, 0, 105, 999, 88, 76}; - - int validSum = 0; // 有效数据总和 - int validCount = 0; // 有效数据个数 - - // 遍历数组，按规则处理数据 - for (int num : sensorData) { - // 规则3：致命错误，遇到999直接终止流程 - if (num == 999) { - System.out.println("致命错误：传感器掉线，终止处理"); - break; - } - // 规则2：无效数据（0/负数/大于100且不是999），跳过并告警 - if (num <= 0 || num > 100) { - System.out.println("警告：发现越界数据[" + num + "]，已跳过"); - continue; - } - // 规则1：正常范围（1-100），计入总和与计数 - validSum += num; - validCount++; - } - - // 规则4：最终输出平均值 - if (validCount > 0) { - // 避免整数除法陷阱：将总和转为double再计算 - double average = (double) validSum / validCount; - System.out.printf("有效数据的平均值为：%.2f%n", average); - } else { - System.out.println("无有效数据"); - } - } -} \ No newline at end of file diff --git a/w3/BankAccount.java b/w3/BankAccount.java deleted file mode 100644 index c24d04f..0000000 --- a/w3/BankAccount.java +++ /dev/null @@ -1,63 +0,0 @@ -public class BankAccount { - // 私有属性 - private final String accountNumber; - private String ownerName; - private double balance; - - // 构造方法 - public BankAccount(String accountNumber, String ownerName) { - this.accountNumber = accountNumber; - this.ownerName = ownerName; - this.balance = 0.0; - } - - // Getter 方法 - public String getAccountNumber() { - return accountNumber; - } - - public String getOwnerName() { - return ownerName; - } - - public double getBalance() { - return balance; - } - - // Setter 方法 - public void setOwnerName(String ownerName) { - this.ownerName = ownerName; - } - - // 存款操作 - public void deposit(double amount) { - if (amount > 0) { - balance += amount; - System.out.println("存款成功！当前余额：" + balance); - } else { - System.out.println("存款金额必须大于 0"); - } - } - - // 取款操作 - public void withdraw(double amount) { - if (amount > 0) { - if (amount <= balance) { - balance -= amount; - System.out.println("取款成功！当前余额：" + balance); - } else { - System.out.println("余额不足，无法取款"); - } - } else { - System.out.println("取款金额必须大于 0"); - } - } - - // 显示账户信息 - public void displayInfo() { - System.out.println("账号：" + accountNumber); - System.out.println("户主：" + ownerName); - System.out.println("余额：" + balance); - System.out.println(); - } -} \ No newline at end of file diff --git a/w3/Car.java b/w3/Car.java deleted file mode 100644 index c934c07..0000000 --- a/w3/Car.java +++ /dev/null @@ -1,154 +0,0 @@ -// Car.java -public class Car { - // 私有属性 - private final String licensePlate; - private String brand; - private String model; - private double dailyRent; - private boolean isRented; - - // 静态变量：统计车辆总数 - private static int totalCars = 0; - - // 全参构造方法 - public Car(String licensePlate, String brand, String model, double dailyRent) { - this.licensePlate = licensePlate; - this.brand = brand; - this.model = model; - setDailyRent(dailyRent); - this.isRented = false; - totalCars++; - } - - // 重载构造方法（日租金默认300） - public Car(String licensePlate, String brand, String model) { - this(licensePlate, brand, model, 300.0); - } - - // Getter/Setter - public String getLicensePlate() { - return licensePlate; - } - - public String getBrand() { - return brand; - } - - public void setBrand(String brand) { - this.brand = brand; - } - - public String getModel() { - return model; - } - - public void setModel(String model) { - this.model = model; - } - - public double getDailyRent() { - return dailyRent; - } - - public void setDailyRent(double dailyRent) { - if (dailyRent > 0) { - this.dailyRent = dailyRent; - } else { - System.out.println("日租金必须大于0，设置失败！"); - } - } - - public boolean isRented() { - return isRented; - } - - // 业务方法：租车 - public void rentCar() { - if (isRented) { - System.out.println("车辆已租出，无法再次租用！"); - } else { - isRented = true; - System.out.println("车辆已成功租出！"); - } - } - -public class Car { - private final String licensePlate; - private String brand; - private String model; - private double dailyRent; - private boolean isRented; - private static int totalCars = 0; - - // 全参构造方法 - public Car(String licensePlate, String brand, String model, double dailyRent) { - this.licensePlate = licensePlate; - this.brand = brand; - this.model = model; - setDailyRent(dailyRent); - this.isRented = false; - totalCars++; - } - - // 重载构造方法 - public Car(String licensePlate, String brand, String model) { - this(licensePlate, brand, model, 300.0); - } - - // Getter/Setter - public String getLicensePlate() { return licensePlate; } - public String getBrand() { return brand; } - public void setBrand(String brand) { this.brand = brand; } - public String getModel() { return model; } - public void setModel(String model) { this.model = model; } - public double getDailyRent() { return dailyRent; } - - public void setDailyRent(double dailyRent) { - if (dailyRent > 0) { - this.dailyRent = dailyRent; - } else { - System.out.println("日租金必须大于0，设置失败！"); - } - } - - public boolean isRented() { return isRented; } - - // 租车方法 - public void rentCar() { - if (isRented) { - System.out.println("车辆已租出，无法再次租用！"); - } else { - isRented = true; - System.out.println("车辆已成功租出！"); - } - } - - // 还车方法 - public void returnCar() { - if (!isRented) { - System.out.println("车辆未被租用，无需归还！"); - } else { - isRented = false; - System.out.println("车辆已成功归还！"); - } - } - - // 计算租金 - public double calculateRent(int days) { - return dailyRent * days; - } - - // 静态方法：获取总车辆数 - public static int getTotalCars() { - return totalCars; - } - - // 打印车辆信息 - public void displayInfo() { - System.out.println("车牌号：" + licensePlate + - " | 品牌：" + brand + - " | 型号：" + model + - " | 日租金：" + dailyRent + - " | 状态：" + (isRented ? "已出租" : "可租")); - } -} \ No newline at end of file diff --git a/w3/Java第一次实验报告.pdf b/w3/Java第一次实验报告.pdf deleted file mode 100644 index b56d0d6..0000000 Binary files a/w3/Java第一次实验报告.pdf and /dev/null differ diff --git a/w3/TestCar.java b/w3/TestCar.java deleted file mode 100644 index 1e8bdd9..0000000 --- a/w3/TestCar.java +++ /dev/null @@ -1,32 +0,0 @@ -public class TestCar { - public static void main(String[] args) { - // 创建3个Car对象 - Car car1 = new Car("京A12345", "特斯拉", "Model 3", 280.0); - Car car2 = new Car("沪B67890", "比亚迪", "汉EV"); - Car car3 = new Car("粤C24680", "丰田", "凯美瑞", 220.0); - - // 输出车辆信息 - System.out.println("=== 所有车辆信息 ==="); - car1.displayInfo(); - car2.displayInfo(); - car3.displayInfo(); - System.out.println("总车辆数：" + Car.getTotalCars()); - - // 测试租车/还车 - System.out.println("\n=== 测试租车/还车 ==="); - car1.rentCar(); - car1.rentCar(); - car1.returnCar(); - car1.returnCar(); - - // 测试租金计算 - System.out.println("\n=== 测试租金计算 ==="); - double rent = car2.calculateRent(5); - System.out.println("租用5天总租金：" + rent + "元"); - - // 测试日租金校验 - System.out.println("\n=== 测试日租金校验 ==="); - car3.setDailyRent(-100.0); // 改为double类型字面量 - System.out.println("修改后日租金：" + car3.getDailyRent()); - } -} \ No newline at end of file