js实现的学生管理系统

云博小周宇2024年5月5日2023年8月11日6 Mins Read

let readline = require(“readline-sync”); // 引入输入模块 // 清屏函数 let clear = () => process.stdout.write(process.platform === ‘win32‘ ? ‘\x1Bc‘ : ‘\x1B[2J\x1B[3J\x1B[H‘); // 管理员信息 let adminInfo = [ { “adminID”: “dengfeng”, “adminPWD”: “123” }, { “adminID”: “liangdaye”, “adminPWD”: “321” } ]; // 初始化3个班级的学生信息使用2维数组来存储 let stuInfo = [ [ { “stuID”: “1”, “stuName”: “bdy”, “stuAge”: “18”, “stuGender”: “male”, “stuScore”: “100”, “className”: “1班” }, { “stuID”: “2”, “stuName”: “luc”, “stuAge”: “23”, “stuGender”: “female”, “stuScore”: “89”, “className”: “1班” }, { “stuID”: “3”, “stuName”: “lc”, “stuAge”: “17”, “stuGender”: “male”, “stuScore”: “93”, “className”: “1班” }, { “stuID”: “4”, “stuName”: “xu”, “stuAge”: “19”, “stuGender”: “female”, “stuScore”: “91”, “className”: “1班” }, { “stuID”: “5”, “stuName”: “chao”, “stuAge”: “20”, “stuGender”: “male”, “stuScore”: “95”, “className”: “1班” } ], [ { “stuID”: “1”, “stuName”: “wf”, “stuAge”: “18”, “stuGender”: “female”, “stuScore”: “85”, “className”: “2班” }, { “stuID”: “2”, “stuName”: “xtf”, “stuAge”: “19”, “stuGender”: “female”, “stuScore”: “91”, “className”: “2班” }, { “stuID”: “3”, “stuName”: “xj”, “stuAge”: “19”, “stuGender”: “male”, “stuScore”: “92”, “className”: “2班” }, { “stuID”: “4”, “stuName”: “ls”, “stuAge”: “21”, “stuGender”: “male”, “stuScore”: “94”, “className”: “2班” }, { “stuID”: “5”, “stuName”: “xjs”, “stuAge”: “22”, “stuGender”: “female”, “stuScore”: “89”, “className”: “2班” } ], [ { “stuID”: “1”, “stuName”: “yaj”, “stuAge”: “22”, “stuGender”: “male”, “stuScore”: “86”, “className”: “3班” }, { “stuID”: “2”, “stuName”: “xj”, “stuAge”: “25”, “stuGender”: “female”, “stuScore”: “89”, “className”: “3班” }, { “stuID”: “3”, “stuName”: “xiz”, “stuAge”: “24”, “stuGender”: “female”, “stuScore”: “80”, “className”: “3班” }, { “stuID”: “4”, “stuName”: “yhq”, “stuAge”: “26”, “stuGender”: “female”, “stuScore”: “92”, “className”: “3班” }, { “stuID”: “5”, “stuName”: “npa”, “stuAge”: “19”, “stuGender”: “male”, “stuScore”: “96”, “className”: “3班” } ] ]; // 管理员登录验证函数账号密码能匹配上返回true 不能匹配上返回false let adminLogin = function (adminID, adminPWD) { for (let i = 0; i < adminInfo.length; i++) { if (adminID === adminInfo[i].adminID && adminPWD === adminInfo[i].adminPWD) { return true; } } return false; } // 班级选择函数用于打印出用户可选的班级返回一个字符串 let classSelect = function () { let str = “”; // 使用for循环拼接出所有的班级，例如：1.第1班 2.第2班 3.第3班 4.返回 for (let i = 0; i < stuInfo.length; i++) { if (stuInfo[i] !== null) { str += (i + 1) + “.” + “第” + (i + 1) + “班 “; } } return “请选择班级：” + str + (stuInfo.length + 1) + “.返回”; } // 班级确认函数用于确认用户输入的班级是否正确 let classCheck = function (classNo) { for (let i = 0; i < stuInfo.length; i++) { if (classNo === (i + 1) && stuInfo[i] !== null) { return true; } } return false; } // 班级查询函数接收一个参数用户想要查询的班级编号打印出该班级所有学生的信息 let classQuery = function (classNo) { clear(); console.log(“班级信息如下：”); console.log(“班级学号姓名年龄性别分数”); let str = “”;// 声明一个空字符串用于拼接班级里面的学生信息 for (let i = 0; i < stuInfo[classNo – 1].length; i++) { str += stuInfo[classNo – 1][i].className + “\t” + stuInfo[classNo – 1][i].stuID + “\t” + stuInfo[classNo – 1][i].stuName + “\t” + stuInfo[classNo – 1][i].stuAge + “\t” + stuInfo[classNo – 1][i].stuGender + “\t” + stuInfo[classNo – 1][i].stuScore; console.log(str); // 拼接好一行就打印一行 str = “”;// 清空字符串以便下一次拼接 } } // 学生查询函数接收一个参数学生姓名(字符串) 打印出该姓名的所有学生 let stuQuery = function (stuName) { let num = 0; let str = “”;// 声明一个空字符串用于拼接班级里面的学生信息 for (let i = 0; i < stuInfo.length; i++) { for (let j = 0; j < stuInfo[i].length; j++) { if (stuName === stuInfo[i][j].stuName) { num++; if (num === 1) { console.log(“找到该姓名学生，该学生具体信息如下：”); console.log(“班级学号姓名年龄性别分数”); } str += stuInfo[i][j].className + “\t” + stuInfo[i][j].stuID + “\t” + stuInfo[i][j].stuName + “\t” + stuInfo[i][j].stuAge + “\t” + stuInfo[i][j].stuGender + “\t” + stuInfo[i][j].stuScore; console.log(str); str = “”; } } } if (num === 0) { console.log(“对不起，没有找到该学生”); } } // 学生确认函数接收两个参数班级编号和学生学号确认该学生是否存在 let stuCheck = function (classNo, stuNo) { for (let i = 0; i < stuInfo[classNo – 1].length; i++) { if (stuNo === stuInfo[classNo – 1][i].stuID) { return stuInfo[classNo – 1][i];// 返回该学生的具体信息 } } return false; } // 学生信息修改函数接收两个参数学生对象和修改选项 let editInfo = function (singleStuInfo, editSelect) { switch (editSelect) { //修改姓名 case 1: { console.log(“请输入修改后的学生姓名：”); let newStuName = readline.question(“”); singleStuInfo.stuName = newStuName; console.log(“修改成功，按回车键返回”); } break; //修改年龄 case 2: { console.log(“请输入修改后的学生年龄：”); let newStuAge = readline.question(“”); singleStuInfo.stuAge = newStuAge; console.log(“修改成功，按回车键返回”); } break; //修改性别 case 3: { let editGender = true; let str = “”; while (editGender) { clear(); str = “”; console.log(“当前该学生信息为：”); console.log(“班级学号姓名年龄性别分数”); str += singleStuInfo.className + “\t” + singleStuInfo.stuID + “\t” + singleStuInfo.stuName + “\t” + singleStuInfo.stuAge + “\t” + singleStuInfo.stuGender + “\t” + singleStuInfo.stuScore; console.log(str); console.log(“请选择您要进行修改的学生信息： 1.姓名 2.年龄 3.性别 4.分数 5.返回”); console.log(“请选择学生的性别： 1.男 2.女”); let newStuGender = parseInt(readline.question(“”)); switch (newStuGender) { case 1: singleStuInfo.stuGender = “male”; editGender = false; console.log(“修改成功，按回车键返回”); break; case 2: singleStuInfo.stuGender = “female”; editGender = false; console.log(“修改成功，按回车键返回”); break; default: console.log(“输入有误，请重新输入”); console.log(“按回车键继续”); readline.question(“”); } } } break; //修改分数 case 4: { console.log(“请输入修改后的学生分数：”); let newStuScore = readline.question(“”); singleStuInfo.stuScore = newStuScore; console.log(“修改成功，按回车键返回”); } break; default: console.log(“选择有误，请重新选择”); break; } readline.question(“”); } // 添加学生信息函数接收5个参数班级编号，学生姓名，年龄，性别，分数 let addStu = function (classNo, addStuName, addStuAge, addStuGender, addStuScore) { for (let i = 0; i < stuInfo.length; i++) { if (classNo === (i + 1)) { let length = stuInfo[i].length; stuInfo[i][length] = {}; stuInfo[i][length].stuID = length + 1 + “”; stuInfo[i][length].stuName = addStuName; stuInfo[i][length].stuAge = addStuAge; addStuGender === 1 ? stuInfo[i][length].stuGender = “male” : stuInfo[i][length].stuGender = “female”; stuInfo[i][length].stuScore = addStuScore; stuInfo[i][length].className = classNo + “班”; console.log(“新增学生成功！”); } } } // 删除班级函数接收一个参数要删除的班级的编号 let delClass = function (classNo) { while (true) { clear(); console.log(classNo + “班”); let str = “”; for (let i = 0; i < stuInfo[classNo – 1].length; i++) { str += stuInfo[classNo – 1][i].className + “\t” + stuInfo[classNo – 1][i].stuID + “\t” + stuInfo[classNo – 1][i].stuName + “\t” + stuInfo[classNo – 1][i].stuAge + “\t” + stuInfo[classNo – 1][i].stuGender + “\t” + stuInfo[classNo – 1][i].stuScore; console.log(str); // 拼接好一行就打印一行 str = “”;// 清空字符串以便下一次拼接 } console.log(“是否确认删除此班级？(Y/N)”); let isDel = readline.question(“”); switch (isDel) { case “Y”: case “y”: stuInfo[classNo – 1] = null; console.log(“删除班级成功，按回车键返回”); readline.question(“”); return; case “N”: case “n”: return; default: console.log(“输入有误，请重新输入！”); readline.question(“”); } } } // 删除学生函数接收2个参数所要删除的学生所在班级编号以及该学生对象 let delStu = function (classNo, stu, func) { let str = “”; for (let i = 0; i < stuInfo[classNo – 1].length; i++) { if (stu.stuID === stuInfo[classNo – 1][i].stuID) { if (func === “del”) { while (true) { clear(); str = “”; console.log(“你要删除的学生信息为：”); console.log(“班级学号姓名年龄性别分数”); str += stuInfo[classNo – 1][i].className + “\t” + stuInfo[classNo – 1][i].stuID + “\t” + stuInfo[classNo – 1][i].stuName + “\t” + stuInfo[classNo – 1][i].stuAge + “\t” + stuInfo[classNo – 1][i].stuGender + “\t” + stuInfo[classNo – 1][i].stuScore; console.log(str); console.log(“是否确认删除？(Y/N)”); let isDel = readline.question(“”); switch (isDel) { case “Y”: case “y”: stuInfo[classNo – 1].splice(i, 1); console.log(“删除学生成功，按回车键返回”); readline.question(“”); return; case “N”: case “n”: return; default: console.log(“输入有误，请重新输入，按回车键继续”); readline.question(“”); } } } else { stuInfo[classNo – 1].splice(i, 1); } } } } // 转班函数接收3个参数原本的班级编号学生对象要去的班级编号 let classTransfer = function (classNo, singleStuInfo, classNo2) { delStu(classNo, singleStuInfo, “trans”); let length = stuInfo[classNo2 – 1].length; if (length === 0) { singleStuInfo.stuID = length + 1 + “”; } else { singleStuInfo.stuID = (parseInt(stuInfo[classNo2 – 1][length – 1].stuID) + 1) + “”; } singleStuInfo.className = classNo2 + “班”; stuInfo[classNo2 – 1][length] = singleStuInfo; } let main = function () { let loginChance = 3; // 登录机会初始化为3次 while (loginChance) // 只要登录机会不为0 就可以进入系统 { clear(); console.log(“请输入您的账号：”); let adminID = readline.question(“”); console.log(“请输入您的密码：”); let adminPWD = readline.question(“”); if (adminLogin(adminID, adminPWD)) // 如果管理员身份验证通过就进入if { let useSys = true;// 设置使用系统的标识 useSys的值为true while (useSys) { clear(); console.log(“欢迎使用学生管理系统”); console.log(“请选择您要执行的功能：1.查询 2.修改 3.增加 4.删除 5.转班 6.退出”); let funcSelect = parseInt(readline.question(“”)); switch (funcSelect) { // 查询功能 case 1: let query = true;// 设置查询的标识 query的值为true while (query) { clear() console.log(“请选择您要进行的查询：1.班级查询 2.学生查询 3.返回”); let querySelect = parseInt(readline.question(“”)); switch (querySelect) { // 班级查询 case 1: { clear(); let str = “”;// 声明一个临时字符串用于拼接提示信息 let classSelectStr = classSelect(); while (true) { clear(); console.log(classSelectStr); let classNo = parseInt(readline.question(“”)); if (classCheck(classNo)) { classQuery(classNo); } else { if (classNo === stuInfo.length + 1) { break; } else { console.log(“输入有误，请重新输入”); } } console.log(“按回车键返回”); readline.question(“”); } break; } // 学生查询 case 2: { clear(); console.log(“请输入您要查询的学生的姓名：”); let stuName = readline.question(“”); stuQuery(stuName); console.log(“按回车键返回”); readline.question(“”); break; } case 3: query = false;// 设置查询的标识 query的值为false break; default: console.log(“输入有误，请重新输入！(按回车键继续)”); readline.question(“”); } } break; // 修改功能 case 2: { let editChoose = true; while (editChoose) { clear(); let str = “”; let classSelectStr = classSelect(); console.log(classSelectStr); let classNo = parseInt(readline.question(“”)); if (classCheck(classNo)) { clear(); console.log(“请输入您要修改的学生的学号：”); let stuNo = readline.question(“”); let singleStuInfo = stuCheck(classNo, stuNo); if (singleStuInfo) { while (true) { clear(); str = “”; console.log(“当前该学生信息为：”); console.log(“班级学号姓名年龄性别分数”); str += singleStuInfo.className + “\t” + singleStuInfo.stuID + “\t” + singleStuInfo.stuName + “\t” + singleStuInfo.stuAge + “\t” + singleStuInfo.stuGender + “\t” + singleStuInfo.stuScore; console.log(str); console.log(“请选择您要进行修改的学生信息： 1.姓名 2.年龄 3.性别 4.分数 5.返回”); let editSelect = parseInt(readline.question(“”)); if (editSelect !== 5) { editInfo(singleStuInfo, editSelect); } else { editChoose = false; break; } } } else { console.log(“对不起！没有找到对应的学生”); console.log(“按回车键返回”); readline.question(“”); break; } } else { if (classNo === stuInfo.length + 1) { break; } else { console.log(“输入有误，请重新输入”); console.log(“按回车键返回”); readline.question(“”); } } } } break; // 增加功能 case 3: { let addInfo = true; while (addInfo) { clear(); console.log(“请选择您要添加的内容： 1.添加班级 2.添加学生 3.返回”); let addSelect = parseInt(readline.question(“”)); switch (addSelect) { case 1: { clear(); let length = stuInfo.length; stuInfo[length] = []; console.log(“新增班级成功！按回车键返回”); readline.question(“”); } break; case 2: { clear(); let classSelectStr = classSelect(); console.log(classSelectStr); let classNo, addStuName, addStuAge, addStuGender, addStuScore; classNo = parseInt(readline.question(“”)); if (classCheck(classNo)) { clear(); console.log(“请输入要添加的学生的姓名：”); addStuName = readline.question(“”); clear(); console.log(“请输入要添加的学生的年龄：”); addStuAge = readline.question(“”); while (true) { clear(); console.log(“请选择学生的性别： 1.男 2.女”); addStuGender = parseInt(readline.question(“”)); if (addStuGender === 1 || addStuGender === 2) { break; } else { console.log(“选择有误，请重新选择，按回车键继续”); readline.question(“”); } } clear(); console.log(“请输入要添加的学生的分数：”); addStuScore = parseInt(readline.question(“”)); addStu(classNo, addStuName, addStuAge, addStuGender, addStuScore); console.log(“按回车键返回”); readline.question(“”); } else { if (classNo === stuInfo.length + 1) { break; } else { console.log(“输入有误，请重新输入”); console.log(“按回车键返回”); readline.question(“”); } } } break; case 3: addInfo = false; break; default: console.log(“选择有误，请重新选择，按回车键继续”); readline.question(“”); } } } break; // 删除功能 case 4: { let delInfo = true; while (delInfo) { clear(); console.log(“请选择您要删除的项目： 1.删除班级 2.删除学生 3.返回”); let delSelect = parseInt(readline.question(“”)); switch (delSelect) { // 删除班级 case 1: let delClassInfo = true; while (delClassInfo) { clear(); let classSelectStr = classSelect(); console.log(classSelectStr); let classNo = parseInt(readline.question(“”)); if (classCheck(classNo)) { delClass(classNo); delClassInfo = false;

} else { if (classNo === stuInfo.length + 1) { break; } else { console.log(“输入有误，请重新输入”); console.log(“按回车键返回”); readline.question(“”); } } } break; // 删除学生 case 2: { let delStuInfo = true; while (delStuInfo) { clear(); let classSelectStr = classSelect(); console.log(classSelectStr); let classNo = parseInt(readline.question(“”)); if (classCheck(classNo)) { clear(); console.log(“请输入您要删除的学生的学号：”); let stuNo = readline.question(“”); let singleStuInfo = stuCheck(classNo, stuNo); delStuInfo = false; if (singleStuInfo) {

delStu(classNo, singleStuInfo, “del”); } else { console.log(“对不起！没有找到对应的学生”); console.log(“按回车键返回”); readline.question(“”); } } else { if (classNo === stuInfo.length + 1) { break; } else { console.log(“输入有误，请重新输入”); console.log(“按回车键返回”); readline.question(“”); } } } } break; case 3: delInfo = false; break; default: console.log(“输入有误，请重新输入，按回车键继续”); readline.question(“”); } } } break; // 转班功能 // 核心思路：首先删除该学生，然后在其他班级上添加该学生 case 5: { let transfer = true; let str = “”; while (transfer) { clear(); let classSelectStr = classSelect(); console.log(“(学生原本所在的班级)” + classSelectStr); let classNo = parseInt(readline.question(“”)); if (classCheck(classNo)) { clear(); console.log(“请输入您要转班的学生的学号：”); let stuNo = readline.question(“”); let singleStuInfo = stuCheck(classNo, stuNo); if (singleStuInfo) { while (true) { clear(); str = “”; let classSelectStr2 = classSelect(); console.log(“班级学号姓名年龄性别分数”); str += singleStuInfo.className + “\t” + singleStuInfo.stuID + “\t” + singleStuInfo.stuName + “\t” + singleStuInfo.stuAge + “\t” + singleStuInfo.stuGender + “\t” + singleStuInfo.stuScore; console.log(str); console.log(“(学生要转去的班级)” + classSelectStr2); let classNo2 = parseInt(readline.question(“”)); if (classCheck(classNo2)) { if (classNo === classNo2) { transfer = false; console.log(“和原来班级相同！按回车键返回主菜单”); readline.question(“”); } else { classTransfer(classNo, singleStuInfo, classNo2); transfer = false; console.log(“转班成功，按回车键返回主菜单”); readline.question(“”); } break; } else { if (classNo2 === stuInfo.length + 1) { transfer = false; break; } else { console.log(“输入有误，请重新输入”); console.log(“按回车键返回”); readline.question(“”); } } } } else { console.log(“对不起！没有找到对应的学生”); console.log(“按回车键返回”); readline.question(“”); break; } } else { if (classNo === stuInfo.length + 1) { break; } else { console.log(“输入有误，请重新输入”); console.log(“按回车键返回”); readline.question(“”); } } } } break; // 退出功能 case 6: useSys = false;// 设置使用系统的标识 useSys的值为false break; default: console.log(“输入有误，请重新输入！(按回车键继续)”); readline.question(“”); } } break;// 跳出外层的循环 } else { // 没有进入上面的if 说明账号密码输入有问题 loginChance–; // 登陆机会自减1 if (loginChance === 0)// 如果登录机会为0 直接跳出while循环 { break; } else { clear(); console.log(`账号密码错误，你还剩下${loginChance}次机会！(按回车键继续)`); readline.question(“”); } } } // 根据loginChance的值来判断是用户主动跳出的，还是登录机会为0跳出的 if (loginChance === 0) { clear(); console.log(“错误次数过多！请稍后再试”); } else { clear(); console.log(“感谢您的使用！”); } } main();