基于javaweb设计一个mysql数据库学生信息管理系统，要数据库设计过程和源码

数据库设计过程：

1. 确定需求：学生信息管理系统需要存储的数据包括学生基本信息、课程信息和成绩信息。

2. 设计ER图：根据需求，设计ER图，包括学生、课程和成绩三个实体，以及它们之间的关系，如学生与课程之间的选课关系，课程与成绩之间的关系等。

3. 范式化：对ER图进行范式化，消除冗余数据，提高数据库的效率和安全性。

4. 设计数据库表：根据ER图和范式化结果，设计数据库表，并设置主键、外键等约束条件。

5. 编写SQL脚本：根据数据库表的设计，编写SQL脚本，创建数据库及表结构，并插入初始数据。

源码：

由于时间和篇幅有限，我提供一个基本的学生信息管理系统的源码框架，供参考。具体实现过程需要根据具体需求进行调整和完善。

1. 数据库连接类：

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class DBConnection {
    private static final String URL = "jdbc:mysql://localhost:3306/student";
    private static final String USER = "root";
    private static final String PASSWORD = "password";
    private static Connection conn = null;

    static {
        try {
            Class.forName("com.mysql.jdbc.Driver");
            conn = DriverManager.getConnection(URL, USER, PASSWORD);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    public static Connection getConnection() {
        return conn;
    }
}

2. 学生类：

public class Student {
    private int id;
    private String name;
    private String gender;
    private int age;

    public Student(int id, String name, String gender, int age) {
        this.id = id;
        this.name = name;
        this.gender = gender;
        this.age = age;
    }

    // getter and setter methods
}

3. 课程类：

public class Course {
    private int id;
    private String name;
    private int credit;

    public Course(int id, String name, int credit) {
        this.id = id;
        this.name = name;
        this.credit = credit;
    }

    // getter and setter methods
}

4. 成绩类：

public class Score {
    private int id;
    private int studentId;
    private int courseId;
    private int score;

    public Score(int id, int studentId, int courseId, int score) {
        this.id = id;
        this.studentId = studentId;
        this.courseId = courseId;
        this.score = score;
    }

    // getter and setter methods
}

5. 数据库操作类：

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

public class DBUtil {
    public static List<Student> getAllStudents() {
        List<Student> students = new ArrayList<Student>();
        Connection conn = DBConnection.getConnection();
        String sql = "SELECT * FROM student";
        try {
            PreparedStatement ps = conn.prepareStatement(sql);
            ResultSet rs = ps.executeQuery();
            while (rs.next()) {
                int id = rs.getInt("id");
                String name = rs.getString("name");
                String gender = rs.getString("gender");
                int age = rs.getInt("age");
                students.add(new Student(id, name, gender, age));
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return students;
    }

    public static List<Course> getAllCourses() {
        List<Course> courses = new ArrayList<Course>();
        Connection conn = DBConnection.getConnection();
        String sql = "SELECT * FROM course";
        try {
            PreparedStatement ps = conn.prepareStatement(sql);
            ResultSet rs = ps.executeQuery();
            while (rs.next()) {
                int id = rs.getInt("id");
                String name = rs.getString("name");
                int credit = rs.getInt("credit");
                courses.add(new Course(id, name, credit));
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return courses;
    }

    public static List<Score> getAllScores() {
        List<Score> scores = new ArrayList<Score>();
        Connection conn = DBConnection.getConnection();
        String sql = "SELECT * FROM score";
        try {
            PreparedStatement ps = conn.prepareStatement(sql);
            ResultSet rs = ps.executeQuery();
            while (rs.next()) {
                int id = rs.getInt("id");
                int studentId = rs.getInt("student_id");
                int courseId = rs.getInt("course_id");
                int score = rs.getInt("score");
                scores.add(new Score(id, studentId, courseId, score));
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return scores;
    }

    public static void addStudent(Student student) {
        Connection conn = DBConnection.getConnection();
        String sql = "INSERT INTO student(id, name, gender, age) VALUES (?, ?, ?, ?)";
        try {
            PreparedStatement ps = conn.prepareStatement(sql);
            ps.setInt(1, student.getId());
            ps.setString(2, student.getName());
            ps.setString(3, student.getGender());
            ps.setInt(4, student.getAge());
            ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    public static void addCourse(Course course) {
        Connection conn = DBConnection.getConnection();
        String sql = "INSERT INTO course(id, name, credit) VALUES (?, ?, ?)";
        try {
            PreparedStatement ps = conn.prepareStatement(sql);
            ps.setInt(1, course.getId());
            ps.setString(2, course.getName());
            ps.setInt(3, course.getCredit());
            ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    public static void addScore(Score score) {
        Connection conn = DBConnection.getConnection();
        String sql = "INSERT INTO score(id, student_id, course_id, score) VALUES (?, ?, ?, ?)";
        try {
            PreparedStatement ps = conn.prepareStatement(sql);
            ps.setInt(1, score.getId());
            ps.setInt(2, score.getStudentId());
            ps.setInt(3, score.getCourseId());
            ps.setInt(4, score.getScore());
            ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    // other database operations, such as update, delete, search, etc.
}

6. 主程序：

import java.util.List;

public class Main {
    public static void main(String[] args) {
        // add a new student
        Student student = new Student(1, "Tom", "male", 20);
        DBUtil.addStudent(student);

        // get all students
        List<Student> students = DBUtil.getAllStudents();
        for (Student s : students) {
            System.out.println(s.getName());
        }

        // add a new course
        Course course = new Course(1, "Java", 3);
        DBUtil.addCourse(course);

        // get all courses
        List<Course> courses = DBUtil.getAllCourses();
        for (Course c : courses) {
            System.out.println(c.getName());
        }

        // add a new score
        Score score = new Score(1, 1, 1, 90);
        DBUtil.addScore(score);

        // get all scores
        List<Score> scores = DBUtil.getAllScores();
        for (Score s : scores) {
            System.out.println(s.getScore());
        }
    }
}