HTML+JavaScript+Servlet+MySQL实现一个简单的学生信息管理系统<link rel="style

话不多说，先上效果图
1、登录界面
在这里插入图片描述

2、学生信息管理界面
展示信息

添加信息
在这里插入图片描述
修改信息

3、课程信息管理界面

4、成绩信息管理界面

部分代码

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>登录</title>
    <link rel="stylesheet" href="../bootstrap/css/bootstrap.min.css">
</head>
<body>
    <h1 class="text-center">学生信息管理系统</h1>
    <div class="container">
        <div class="form-group">
            <label>用户名</label>
            <input type="text" class="form-control" id="username" placeholder="请输入用户名"/>
        </div>
        <div class="form-group">
            <label>密码</label>
            <input type="password" class="form-control" id="password" placeholder="请输入密码"/>
        </div>
        <div class="row">
            <div class="col-md-6">
                <button class="btn btn-info btn-block btn-flat" id="loginBtn">登录</button>
            </div>
            <div class="col-md-6">
                <button class="btn btn-info btn-block btn-flat" id="resetBtn" type="reset">重置</button>
            </div>
        </div>
    </div>
    <script src="../js/jQuery-2.1.4.min.js"></script>
    <script src="../bootstrap/js/bootstrap.min.js"></script>
    <script>
        $('#loginBtn').on('click',function(){

            var username = $('#username').val();
            var password = $('#password').val();
            //alert(username+" "+password);
            var url = "/LoginServlet";
            var d={
                "username":username,
                "password":password
            };
            $.ajax({
                type:"post",
                url:url,
                dataType:"json",
                data:d,
                success:function(res){
                    if(res.code == 1){
                        window.location='/student/student.html';
                    }else{
                        alert("用户名或密码错误！");
                    }
                }
            })
        });
    </script>
</body>
</html>

package login;

import database.DataBaseAccess;

import java.sql.*;

public class LoginAccess extends DataBaseAccess
{
    public static boolean checkUser(String username, String password)
    {
        Connection connection = null;
        PreparedStatement p = null;
        ResultSet resultSet = null;
        String sql = "select * from user where name=? and password=?";
        try
        {
            connection = getConnection();
            assert connection != null;
            p = connection.prepareStatement(sql);
            p.setString(1,username);
            p.setString(2,password);
            resultSet = p.executeQuery();
            if(resultSet.next())
            {
                return true;
            }
        }
        catch (SQLException e)
        {
            e.printStackTrace();
        }
        finally
        {
            close(resultSet,p,connection);
        }
        return false;
    }
}

package login;

import com.alibaba.fastjson.JSONObject;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

@WebServlet("/LoginServlet")
public class LoginServlet extends HttpServlet
{
    private static final long serialVersionUID = 1L;

    protected void doPost(HttpServletRequest res, HttpServletResponse resp) throws IOException
    {
        // 设置响应的内容编码方式为UTF-8，才能使用中文
        //resp.setCharacterEncoding("UTF-8");
        //resp.setContentType("text/html;charset=UTF-8");
        // 从前端的请求中拿到用户名和密码
        String username = res.getParameter("username");
        String password = res.getParameter("password");
        //System.out.println(username+" "+password);
        // 开始验证
        JSONObject jsonObject = new JSONObject();
        if(LoginAccess.checkUser(username, password))
        {
            jsonObject.put("code",1);
        }else
        {
            jsonObject.put("code",0);
        }
        // 返回前端
        PrintWriter printWriter = resp.getWriter();
        printWriter.print(jsonObject);
        printWriter.close();
    }
}

package student;


public class Student {

	private int id;
	private String name;
	private String major;

	public Student(int id, String name,String major) {
		this.id=id;
		this.name=name;
		this.major=major;
	}
	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 String getMajor() {
		return major;
	}
	public void setMajor(String major) {
		this.major = major;
	}
	public void print() {
		System.out.println(this.id+"\t\t"+this.name+"\t\t"+this.major);
	}
}

package grade;

import course.Course;
import student.Student;

public class Grade
{
    private String studentName; // 该成绩所对应的学生姓名
    private String courseName; // 该成绩所对应的课程名称
    private double grade; // 成绩

    public Grade(String studentName, String courseName, double grade)
    {
        this.studentName = studentName;
        this.courseName = courseName;
        this.grade = grade;
    }

    public String getStudentName()
    {
        return studentName;
    }

    public void setStudentName(String studentName)
    {
        this.studentName = studentName;
    }

    public String getCourseName()
    {
        return courseName;
    }

    public void setCourseName(String courseName)
    {
        this.courseName = courseName;
    }

    public double getGrade()
    {
        return grade;
    }

    public void setGrade(double grade)
    {
        this.grade = grade;
    }
}