为我完成这份代码
时间: 2024-02-18 20:06:18 浏览: 23
由于时间和篇幅的限制,我无法为您完成整个代码,但是我可以给您提供一个代码框架和思路,供您参考。
首先,我们可以定义三个实体类:Student、Book、Borrow,分别对应学生、图书和借阅信息。
```java
public class Student {
private int id; // 学号
private String name; // 姓名
private String major; // 专业
private String className; // 班级
private int borrowCount; // 已借图书数量
// 省略 getter 和 setter 方法
}
public class Book {
private int id; // 图书登记号
private String isbn; // 书号
private String name; // 书名
private String author; // 作者
private double price; // 单价
private int stockCount; // 库存数量
private String publishDate; // 出版时间
private String publishUnit; // 出版单位
private String status; // 图书状态(已借出、未借出、丢失、销毁等)
// 省略 getter 和 setter 方法
}
public class Borrow {
private int id; // 借阅序列号
private int studentId; // 学生学号
private int bookId; // 图书登记号
private String borrowDate; // 借阅时间
private String returnDate; // 归还时间
// 省略 getter 和 setter 方法
}
```
接着,我们可以使用 JDBC 连接 MySQL 数据库,实现对三个实体类的增删改查操作。下面是一个示例代码:
```java
public class DBUtil {
private static final String URL = "jdbc:mysql://localhost:3306/library?useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC";
private static final String USERNAME = "root";
private static final String PASSWORD = "123456";
// 获取数据库连接
public static Connection getConnection() throws SQLException {
return DriverManager.getConnection(URL, USERNAME, PASSWORD);
}
// 关闭数据库连接
public static void close(Connection conn, Statement stmt, ResultSet rs) {
try {
if (rs != null) {
rs.close();
}
if (stmt != null) {
stmt.close();
}
if (conn != null) {
conn.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public class StudentDao {
// 添加学生信息
public boolean add(Student student) {
Connection conn = null;
PreparedStatement stmt = null;
try {
conn = DBUtil.getConnection();
stmt = conn.prepareStatement("INSERT INTO student VALUES (?, ?, ?, ?, ?)");
stmt.setInt(1, student.getId());
stmt.setString(2, student.getName());
stmt.setString(3, student.getMajor());
stmt.setString(4, student.getClassName());
stmt.setInt(5, student.getBorrowCount());
int rows = stmt.executeUpdate();
return rows > 0;
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.close(conn, stmt, null);
}
return false;
}
// 删除学生信息
public boolean delete(int id) {
Connection conn = null;
PreparedStatement stmt = null;
try {
conn = DBUtil.getConnection();
stmt = conn.prepareStatement("DELETE FROM student WHERE id = ?");
stmt.setInt(1, id);
int rows = stmt.executeUpdate();
return rows > 0;
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.close(conn, stmt, null);
}
return false;
}
// 更新学生信息
public boolean update(Student student) {
Connection conn = null;
PreparedStatement stmt = null;
try {
conn = DBUtil.getConnection();
stmt = conn.prepareStatement("UPDATE student SET name = ?, major = ?, class_name = ?, borrow_count = ? WHERE id = ?");
stmt.setString(1, student.getName());
stmt.setString(2, student.getMajor());
stmt.setString(3, student.getClassName());
stmt.setInt(4, student.getBorrowCount());
stmt.setInt(5, student.getId());
int rows = stmt.executeUpdate();
return rows > 0;
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.close(conn, stmt, null);
}
return false;
}
// 查询所有学生信息
public List<Student> findAll() {
Connection conn = null;
PreparedStatement stmt = null;
ResultSet rs = null;
List<Student> students = new ArrayList<>();
try {
conn = DBUtil.getConnection();
stmt = conn.prepareStatement("SELECT * FROM student");
rs = stmt.executeQuery();
while (rs.next()) {
Student student = new Student();
student.setId(rs.getInt("id"));
student.setName(rs.getString("name"));
student.setMajor(rs.getString("major"));
student.setClassName(rs.getString("class_name"));
student.setBorrowCount(rs.getInt("borrow_count"));
students.add(student);
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.close(conn, stmt, rs);
}
return students;
}
// 根据学号查询学生信息
public Student findById(int id) {
Connection conn = null;
PreparedStatement stmt = null;
ResultSet rs = null;
try {
conn = DBUtil.getConnection();
stmt = conn.prepareStatement("SELECT * FROM student WHERE id = ?");
stmt.setInt(1, id);
rs = stmt.executeQuery();
if (rs.next()) {
Student student = new Student();
student.setId(rs.getInt("id"));
student.setName(rs.getString("name"));
student.setMajor(rs.getString("major"));
student.setClassName(rs.getString("class_name"));
student.setBorrowCount(rs.getInt("borrow_count"));
return student;
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.close(conn, stmt, rs);
}
return null;
}
}
// BookDao 和 BorrowDao 类似,这里省略代码
```
最后,我们可以使用 Servlet 或 Spring MVC 等框架,实现对前端页面的请求响应,从而实现图书借阅管理系统的完整功能。
希望这个代码框架和思路能够对您有所帮助!