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项目编号:BS-QD-002
主要需求:
考虑到实用性,该系统需要拆分为两大子系统,一个是学生端系统,一个是后台管理端系统。学生端系统主要提供给学生使用,负责一些宿舍记录及个人信息记录的基本操作;后台管理模块则是主要负责对所有学生信息的整理,提供宿舍管理、楼层管理、数据查看等权限,提供给宿舍管理员使用的。
学生系统拥有以下功能:
管理系统拥有以下功能:
超级管理员在享有上述管理员同等权限的同时额外拥有如下功能:
前端:
后台(Nodejs):
数据库:
数据库设计一览:

下面展示一下系统的部分功能:

仪表盘概揽:选择不同的宿舍楼查看相关信息


管理员管理:

宿舍楼管理

楼层管理

宿舍信息


宿舍入住学生信息

查看学生起床记录

查看学生归宿信息

查看学生宿舍打扫信息

查看个人信息

学生注册

注册后登陆系统

入住宿舍

起床打卡

归宿记录

打扫记录

后端工程:

前端工程

部门核心代码:
const { Building } = require("../model")
module.exports = {
getStudents: async function(buildingId) {
const FloorController = require("./floor_controller")
let users = []
const building = await Building.findOne({ where: { id: buildingId } })
const floors = await building.getFloors()
for (let floor of floors) {
const floorId = floor.id
users = [...users, ...(await FloorController.getStudents(floorId))]
}
return users
},
delBuilding: async function(id) {
const { setStudentRoomNull } = require("./user_controller")
const students = await this.getStudents(id)
students.forEach(student => {
setStudentRoomNull(student.id)
})
return await Building.destroy({ where: { id } })
}
}
const _ = require("lodash")
const { User } = require("../model")
module.exports = {
async getEvaluatesInfo(evaluates) {
const cpEvaluates = _.cloneDeep(evaluates)
for (let evaluate of cpEvaluates) {
const creator = await evaluate.getUser()
evaluate.dataValues.userName = creator.name
}
return cpEvaluates
}
}
const { Floor } = require("../model")
module.exports = {
getStudents: async function(floorId) {
const { getStudentInfo } = require("./user_controller")
let users = []
const floor = await Floor.findOne({ where: { id: floorId } })
const rooms = await floor.getRooms()
for (let room of rooms) {
const roomUsers = await room.getUsers()
for (let user of roomUsers) {
users.push(await getStudentInfo(user.id))
}
}
return users
}
}
module.exports = {
UserController: require("./user_controller"),
RoomController: require("./room_controller"),
FloorController: require("./floor_controller"),
BuildingController: require("./building_controller"),
EvaluateController: require("./evaluate_controller"),
RecordController: require("./record_controller")
}
const {
User,
GetupRecord,
CleanRecord,
BackRecord,
Room,
Floor,
Building
} = require("../model")
const { Op } = require("sequelize")
const moment = require("moment")
const _ = require("lodash")
const getupEarlyPoint = 8
const backEarlyPoint = 22
module.exports = {
// getup 相关
async addGetupRecord(userId) {
const user = await User.findOne({ where: { id: userId } })
const todyRecord = await GetupRecord.findOne({
where: {
userId: user.id,
roomId: user.roomId,
createdAt: {
[Op.gt]: moment()
.startOf("day")
.toDate(),
[Op.lt]: moment()
.endOf("day")
.toDate()
}
}
})
if (todyRecord) {
throw new Error("当天已经有记录,记录失败!")
}
return await GetupRecord.create({ userId: user.id, roomId: user.roomId })
},
async getUserGetupRecords(userId, days, pure = false) {
days = parseInt(days)
const user = await User.findOne({ where: { id: userId } })
const roomId = user.roomId
const room = await Room.findOne({ where: { id: roomId } })
// 获取最近 days 天的记录
const startTime = moment()
.subtract(days - 1 /* -1 代表查询天数包括今天 */, "days")
.startOf("day")
.toDate()
const allRecords = []
for (let i = 0; i < days; i++) {
const todayStart = moment(startTime)
.add(i, "days")
.toDate()
const todayEnd = moment(todayStart)
.endOf("day")
.toDate()
let record = await GetupRecord.findOne({
where: {
userId,
roomId,
createdAt: {
[Op.gt]: todayStart,
[Op.lt]: todayEnd
}
},
attributes: { exclude: ["updatedAt", "deletedAt"] }
})
if (record) {
// 如果当天有记录就推入结果
record = record.toJSON()
record.time = moment(record.createdAt).format("HH:mm")
} else if (!record && !pure) {
// 如果获取的是全部数据且当前天无数据
// 就建立一条空记录
record = GetupRecord.build({
id: "fake" + i,
roomId,
userId,
createdAt: todayStart
}).toJSON()
record.time = null
} else {
continue
}
record.date = moment(record.createdAt).format("YYYY-MM-DD")
record.userName = user.name
record.roomNumber = room.number
allRecords.push(record)
}
return allRecords.reverse()
},
async getRoomGetupRecords(roomId, days, pure = false) {
days = parseInt(days)
const room = await Room.findOne({ where: { id: roomId } })
const users = await room.getUsers()
const records = {}
for (let user of users) {
records[user.name] = await this.getUserGetupRecords(user.id, days, pure)
}
return records
},
async getGetupRecordLineCharData(roomId) {
const room = await Room.findOne({ where: { id: roomId } })
const users = await room.getUsers()
const data = { columns: ["周期"], rows: [] }
const dataCount = 5 // 获取的记录条数
const dataStep = 7 // 每条记录相隔的条数
// 初始化记录值
for (let i = 0; i < dataCount; i++) {
data.rows.push({ 周期: `最近${(i + 1) * dataStep}天` })
}
// 遍历当前宿舍的用户
for (let user of users) {
data.columns.push(user.name)
for (let i = 0; i < dataCount; i++) {
const days = (i + 1) * dataStep
// 获取某学生最近 days 天的早起记录
const records = await this.getUserGetupRecords(user.id, days, true)
let earlyTimes = 0
records.forEach(record => {
// 统计这些记录中有几天是早起的
const timeHour = parseInt(moment(record.createdAt).format("HH"))
if (timeHour < getupEarlyPoint) {
earlyTimes++
}
})
// 计算早起率
const probability = (earlyTimes / days).toFixed(4)
data.rows[i][user.name] = probability
}
}
return data
},
async getGetupTableData({
current,
step,
buildingId,
floorId,
roomId,
userId,
startTime,
endTime
}) {
// 初始化时间
startTime = startTime
? moment(startTime)
.startOf("day")
.toDate()
: moment(0).toDate()
endTime = endTime
? moment(endTime)
.endOf("day")
.toDate()
: moment()
.endOf("day")
.toDate()
console.log("endTime: ", endTime)
// 开始分情况获取数据
let result
if (userId) {
result = await GetupRecord.findAndCountAll({
where: {
userId: userId,
createdAt: {
[Op.gt]: startTime,
[Op.lt]: endTime
}
},
limit: step,
offset: step * (current - 1),
order: [["createdAt", "DESC"]]
})
} else if (roomId) {
result = await GetupRecord.findAndCountAll({
where: {
roomId: roomId,
createdAt: {
[Op.gt]: startTime,
[Op.lt]: endTime
}
},
limit: step,
offset: step * (current - 1),
order: [["createdAt", "DESC"]]
})
} else if (floorId) {
result = await GetupRecord.findAndCountAll({
where: {
createdAt: {
[Op.gt]: startTime,
[Op.lt]: endTime
}
},
include: [
{
model: Room,
where: { floorId }
}
],
limit: step,
offset: step * (current - 1),
order: [["createdAt", "DESC"]]
})
} else if (buildingId) {
result = await GetupRecord.findAndCountAll({
where: {
createdAt: {
[Op.gt]: startTime,
[Op.lt]: endTime
}
},
include: [
{
model: Room,
where: { buildingId }
}
],
limit: step,
offset: step * (current - 1),
order: [["createdAt", "DESC"]]
})
} else {
result = await GetupRecord.findAndCountAll({
where: {
createdAt: {
[Op.gt]: startTime,
[Op.lt]: endTime
}
},
limit: step,
offset: step * (current - 1),
order: [["createdAt", "DESC"]]
})
}
const getStudentInfo = require("./user_controller").getStudentInfo
let rows = []
for (let record of result.rows) {
record = record.toJSON()
delete record.room
const userInfo = await getStudentInfo(record.userId)
record = Object.assign(userInfo, record)
record.time = moment(record.createdAt).format("HH:mm")
record.date = moment(record.createdAt).format("YYYY-MM-DD")
if (parseInt(moment(record.createdAt).format("HH")) < getupEarlyPoint) {
record.early = true
} else {
record.early = false
}
rows.push(record)
}
result.rows = rows
return result
},
// back 相关
async addBackRecord(userId) {
const user = await User.findOne({ where: { id: userId } })
const todyRecord = await BackRecord.findOne({
where: {
userId: user.id,
roomId: user.roomId,
createdAt: {
[Op.gt]: moment()
.startOf("day")
.toDate(),
[Op.lt]: moment()
.endOf("day")
.toDate()
}
}
})
if (todyRecord) {
throw new Error("当天已经有记录,记录失败!")
}
return await BackRecord.create({ userId: user.id, roomId: user.roomId })
},
async getUserBackRecords(userId, days, pure = false) {
days = parseInt(days)
const user = await User.findOne({ where: { id: userId } })
const roomId = user.roomId
const room = await Room.findOne({ where: { id: roomId } })
// 获取最近 days 天的记录
const startTime = moment()
.subtract(days - 1 /* -1 代表查询天数包括今天 */, "days")
.startOf("day")
.toDate()
const allRecords = []
for (let i = 0; i < days; i++) {
const todayStart = moment(startTime)
.add(i, "days")
.toDate()
const todayEnd = moment(todayStart)
.endOf("day")
.toDate()
let record = await BackRecord.findOne({
where: {
userId,
roomId,
createdAt: {
[Op.gt]: todayStart,
[Op.lt]: todayEnd
}
},
attributes: { exclude: ["updatedAt", "deletedAt"] }
})
if (record) {
// 如果当天有记录就推入结果
record = record.toJSON()
record.time = moment(record.createdAt).format("HH:mm")
} else if (!record && !pure) {
// 如果获取的是全部数据且当前天无数据
// 就建立一条空记录
record = BackRecord.build({
id: "fake" + i,
roomId,
userId,
createdAt: todayStart
}).toJSON()
record.time = null
} else {
continue
}
record.date = moment(record.createdAt).format("YYYY-MM-DD")
record.userName = user.name
record.roomNumber = room.number
allRecords.push(record)
}
return allRecords.reverse()
},
async getRoomBackRecords(roomId, days, pure = false) {
days = parseInt(days)
const room = await Room.findOne({ where: { id: roomId } })
const users = await room.getUsers()
const records = {}
for (let user of users) {
records[user.name] = await this.getUserBackRecords(user.id, days, pure)
}
return records
},
async getBackRecordLineCharData(roomId) {
const room = await Room.findOne({ where: { id: roomId } })
const users = await room.getUsers()
const data = { columns: ["周期"], rows: [] }
const dataCount = 5 // 获取的记录条数
const dataStep = 7 // 每条记录相隔的条数
// 初始化记录值
for (let i = 0; i < dataCount; i++) {
data.rows.push({ 周期: `最近${(i + 1) * dataStep}天` })
}
// 遍历当前宿舍的用户
for (let user of users) {
data.columns.push(user.name)
for (let i = 0; i < dataCount; i++) {
const days = (i + 1) * dataStep
// 获取某学生最近 days 天的归宿记录
const records = await this.getUserBackRecords(user.id, days, true)
let earlyTimes = 0
records.forEach(record => {
// 统计这些记录中有几天是早归的
const timeHour = parseInt(moment(record.createdAt).format("HH"))
if (timeHour < backEarlyPoint) {
earlyTimes++
}
})
// 计算早起率
const probability = (earlyTimes / days).toFixed(4)
data.rows[i][user.name] = probability
}
}
return data
},
async getBackTableData({
current,
step,
buildingId,
floorId,
roomId,
userId,
startTime,
endTime
}) {
// 初始化时间
startTime = startTime
? moment(startTime)
.startOf("day")
.toDate()
: moment(0).toDate()
endTime = endTime
? moment(endTime)
.endOf("day")
.toDate()
: moment()
.endOf("day")
.toDate()
// 开始分情况获取数据
let result
if (userId) {
result = await BackRecord.findAndCountAll({
where: {
userId: userId,
createdAt: {
[Op.gt]: startTime,
[Op.lt]: endTime
}
},
limit: step,
offset: step * (current - 1),
order: [["createdAt", "DESC"]]
})
} else if (roomId) {
result = await BackRecord.findAndCountAll({
where: {
roomId: roomId,
createdAt: {
[Op.gt]: startTime,
[Op.lt]: endTime
}
},
limit: step,
offset: step * (current - 1),
order: [["createdAt", "DESC"]]
})
} else if (floorId) {
result = await BackRecord.findAndCountAll({
where: {
createdAt: {
[Op.gt]: startTime,
[Op.lt]: endTime
}
},
include: [
{
model: Room,
where: { floorId }
}
],
limit: step,
offset: step * (current - 1),
order: [["createdAt", "DESC"]]
})
} else if (buildingId) {
result = await BackRecord.findAndCountAll({
where: {
createdAt: {
[Op.gt]: startTime,
[Op.lt]: endTime
}
},
include: [
{
model: Room,
where: { buildingId }
}
],
limit: step,
offset: step * (current - 1),
order: [["createdAt", "DESC"]]
})
} else {
result = await BackRecord.findAndCountAll({
where: {
createdAt: {
[Op.gt]: startTime,
[Op.lt]: endTime
}
},
limit: step,
offset: step * (current - 1),
order: [["createdAt", "DESC"]]
})
}
const getStudentInfo = require("./user_controller").getStudentInfo
let rows = []
for (let record of result.rows) {
record = record.toJSON()
delete record.room
const userInfo = await getStudentInfo(record.userId)
record = Object.assign(userInfo, record)
record.time = moment(record.createdAt).format("HH:mm")
record.date = moment(record.createdAt).format("YYYY-MM-DD")
if (parseInt(moment(record.createdAt).format("HH")) < backEarlyPoint) {
record.early = true
} else {
record.early = false
}
rows.push(record)
}
result.rows = rows
return result
},
// clean 相关
async addCleanRecord(userId) {
const user = await User.findOne({ where: { id: userId } })
const todyRecord = await CleanRecord.findOne({
where: {
roomId: user.roomId,
createdAt: {
[Op.gt]: moment()
.startOf("day")
.toDate(),
[Op.lt]: moment()
.endOf("day")
.toDate()
}
}
})
if (todyRecord) {
throw new Error("当天已经有清扫记录,记录失败")
}
return await CleanRecord.create({
userId: user.id,
roomId: user.roomId
})
},
async getUserCleanRecords(userId, days) {
// 获取打扫记录不会自动补全每一天的信息
days = parseInt(days)
const user = await User.findOne({ where: { id: userId } })
const roomId = user.roomId
const room = await Room.findOne({ where: { id: roomId } })
// 获取最近 days 天的记录
const startTime = moment()
.subtract(days - 1 /* -1 代表查询天数包括今天 */, "days")
.startOf("day")
.toDate()
const todayEnd = moment()
.endOf("day")
.toDate()
const records = await CleanRecord.findAll({
where: {
userId,
roomId,
createdAt: {
[Op.gt]: startTime,
[Op.lt]: todayEnd
}
},
attributes: { exclude: ["updatedAt", "deletedAt"] },
order: [["createdAt", "DESC"]]
})
const allRecords = []
records.forEach(record => {
record = record.toJSON()
record.time = moment(record.createdAt).format("HH:mm")
record.date = moment(record.createdAt).format("YYYY-MM-DD")
record.userName = user.name
record.roomNumber = room.number
allRecords.push(record)
})
return allRecords
},
async getRoomCleanRecords(roomId, days) {
const room = await Room.findOne({ where: { id: roomId } })
const startTime = moment()
.subtract(days - 1 /* -1 代表查询天数包括今天 */, "days")
.startOf("day")
.toDate()
const todayEnd = moment()
.endOf("day")
.toDate()
const records = await room.getCleanRecords({
where: {
createdAt: {
[Op.gt]: startTime,
[Op.lt]: todayEnd
}
},
attributes: { exclude: ["updatedAt", "deletedAt"] },
order: [["createdAt", "DESC"]]
})
const allRecords = []
for (let record of records) {
const user = await record.getUser()
record = record.toJSON()
record.date = moment(record.createdAt).format("YYYY-MM-DD")
record.time = moment(record.createdAt).format("HH:mm")
record.userName = user.name
record.roomNumber = room.number
allRecords.push(record)
}
return allRecords
},
async getCleanTableData({
current,
step,
buildingId,
floorId,
roomId,
userId,
startTime,
endTime
}) {
// 初始化时间
startTime = startTime
? moment(startTime)
.startOf("day")
.toDate()
: moment(0).toDate()
endTime = endTime
? moment(endTime)
.endOf("day")
.toDate()
: moment()
.endOf("day")
.toDate()
// 开始分情况获取数据
let result
if (userId) {
result = await CleanRecord.findAndCountAll({
where: {
userId: userId,
createdAt: {
[Op.gt]: startTime,
[Op.lt]: endTime
}
},
limit: step,
offset: step * (current - 1),
order: [["createdAt", "DESC"]]
})
} else if (roomId) {
result = await CleanRecord.findAndCountAll({
where: {
roomId: roomId,
createdAt: {
[Op.gt]: startTime,
[Op.lt]: endTime
}
},
limit: step,
offset: step * (current - 1),
order: [["createdAt", "DESC"]]
})
} else if (floorId) {
result = await CleanRecord.findAndCountAll({
where: {
createdAt: {
[Op.gt]: startTime,
[Op.lt]: endTime
}
},
include: [
{
model: Room,
where: { floorId }
}
],
limit: step,
offset: step * (current - 1),
order: [["createdAt", "DESC"]]
})
} else if (buildingId) {
result = await CleanRecord.findAndCountAll({
where: {
createdAt: {
[Op.gt]: startTime,
[Op.lt]: endTime
}
},
include: [
{
model: Room,
where: { buildingId }
}
],
limit: step,
offset: step * (current - 1),
order: [["createdAt", "DESC"]]
})
} else {
result = await CleanRecord.findAndCountAll({
where: {
createdAt: {
[Op.gt]: startTime,
[Op.lt]: endTime
}
},
limit: step,
offset: step * (current - 1),
order: [["createdAt", "DESC"]]
})
}
const getStudentInfo = require("./user_controller").getStudentInfo
let rows = []
for (let record of result.rows) {
record = record.toJSON()
delete record.room
const userInfo = await getStudentInfo(record.userId)
record = Object.assign(userInfo, record)
record.time = moment(record.createdAt).format("HH:mm")
record.date = moment(record.createdAt).format("YYYY-MM-DD")
record.early = null
rows.push(record)
}
result.rows = rows
return result
},
// 通用
async getUserProbability(type, userId) {
const user = await User.findById(userId)
const startTime = user.checkTime
let records = []
let allRecords = []
switch (type) {
case "getup":
allRecords = await user.getGetupRecords({
where: {
createdAt: { [Op.gt]: startTime }
}
})
allRecords.forEach(record => {
let hour = parseInt(moment(record.createdAt).format("HH"))
if (hour < getupEarlyPoint) {
records.push(record)
}
})
break
case "back":
allRecords = await user.getBackRecords({
where: {
createdAt: { [Op.gt]: startTime }
}
})
allRecords.forEach(record => {
let hour = parseInt(moment(record.createdAt).format("HH"))
if (hour < backEarlyPoint) {
records.push(record)
}
})
break
case "clean":
records = await user.getCleanRecords({
where: {
createdAt: { [Op.gt]: startTime }
}
})
break
default:
throw new Error("参数传入错误")
}
// 计算从入住到现在有几天了
const days = Math.abs(moment(startTime).diff(moment(), "days"))
return (records.length / (days + 1)).toFixed(4)
}
}
const { User } = require("../model")
const _ = require("lodash")
const RecordController = require("./record_controller")
module.exports = {
/**
* 获取学生用户的完整信息
* @param {Number} userId
*/
async getStudentInfo(userId) {
const student = await User.findOne({
where: { id: userId },
attributes: { exclude: ["password", "deletedAt"] }
})
const room = await student.getRoom()
const floor = await room.getFloor()
const building = await floor.getBuilding()
const getupProb = await RecordController.getUserProbability("getup", userId)
const backProb = await RecordController.getUserProbability("back", userId)
const cleanProb = await RecordController.getUserProbability("clean", userId)
const info = Object.assign(student.dataValues, {
roomNumber: room.number,
floorId: floor.id,
floorLayer: floor.layer,
buildingId: building.id,
buildingName: building.name,
getupProb,
backProb,
cleanProb
})
return info
},
/**
* 获取学生用户们的完整信息
* @param {Array} users
*/
async getStudentsInfo(users) {
const cloneUsers = _.cloneDeep(users)
for (let user of cloneUsers) {
delete user.dataValues.password
delete user.dataValues.deletedAt
const room = await user.getRoom()
const floor = await room.getFloor()
const building = await floor.getBuilding()
Object.assign(user.dataValues, {
roomNumber: room.number,
floorId: floor.id,
floorLayer: floor.layer,
buildingId: building.id,
buildingName: building.name
})
}
return cloneUsers
},
async setStudentRoomNull(id) {
const student = await User.findOne({ where: { id, role: "student" } })
const result = await student.update({ roomId: null })
return result
}
}
我正在使用i18n从头开始构建一个多语言网络应用程序,虽然我自己可以处理一大堆yml文件,但我说的语言(非常)有限,最终我想寻求外部帮助帮助。我想知道这里是否有人在使用UI插件/gem(与django上的django-rosetta不同)来处理多个翻译器,其中一些翻译器不愿意或无法处理存储库中的100多个文件,处理语言数据。谢谢&问候,安德拉斯(如果您已经在rubyonrails-talk上遇到了这个问题,我们深表歉意) 最佳答案 有一个rails3branchofthetolkgem在github上。您可以通过在Gemfi
我有一个用户工厂。我希望默认情况下确认用户。但是鉴于unconfirmed特征,我不希望它们被确认。虽然我有一个基于实现细节而不是抽象的工作实现,但我想知道如何正确地做到这一点。factory:userdoafter(:create)do|user,evaluator|#unwantedimplementationdetailshereunlessFactoryGirl.factories[:user].defined_traits.map(&:name).include?(:unconfirmed)user.confirm!endendtrait:unconfirmeddoenden
我安装了ruby版本管理器,并将RVM安装的ruby实现设置为默认值,这样'哪个ruby'显示'~/.rvm/ruby-1.8.6-p383/bin/ruby'但是当我在emacs中打开inf-ruby缓冲区时,它使用安装在/usr/bin中的ruby。有没有办法让emacs像shell一样尊重ruby的路径?谢谢! 最佳答案 我创建了一个emacs扩展来将rvm集成到emacs中。如果您有兴趣,可以在这里获取:http://github.com/senny/rvm.el
是否有简单的方法来更改默认ISO格式(yyyy-mm-dd)的ActiveAdmin日期过滤器显示格式? 最佳答案 您可以像这样为日期选择器提供额外的选项,而不是覆盖js:=f.input:my_date,as::datepicker,datepicker_options:{dateFormat:"mm/dd/yy"} 关于ruby-on-rails-事件管理员日期过滤器日期格式自定义,我们在StackOverflow上找到一个类似的问题: https://s
导读:随着叮咚买菜业务的发展,不同的业务场景对数据分析提出了不同的需求,他们希望引入一款实时OLAP数据库,构建一个灵活的多维实时查询和分析的平台,统一数据的接入和查询方案,解决各业务线对数据高效实时查询和精细化运营的需求。经过调研选型,最终引入ApacheDoris作为最终的OLAP分析引擎,Doris作为核心的OLAP引擎支持复杂地分析操作、提供多维的数据视图,在叮咚买菜数十个业务场景中广泛应用。作者|叮咚买菜资深数据工程师韩青叮咚买菜创立于2017年5月,是一家专注美好食物的创业公司。叮咚买菜专注吃的事业,为满足更多人“想吃什么”而努力,通过美好食材的供应、美好滋味的开发以及美食品牌的孵
电脑0x0000001A蓝屏错误怎么U盘重装系统教学分享。有用户电脑开机之后遇到了系统蓝屏的情况。系统蓝屏问题很多时候都是系统bug,只有通过重装系统来进行解决。那么蓝屏问题如何通过U盘重装新系统来解决呢?来看看以下的详细操作方法教学吧。 准备工作: 1、U盘一个(尽量使用8G以上的U盘)。 2、一台正常联网可使用的电脑。 3、ghost或ISO系统镜像文件(Win10系统下载_Win10专业版_windows10正式版下载-系统之家)。 4、在本页面下载U盘启动盘制作工具:系统之家U盘启动工具。 U盘启动盘制作步骤: 注意:制作期间,U盘会被格式化,因此U盘中的重要文件请注
华为OD机试题本篇题目:明明的随机数题目输入描述输出描述:示例1输入输出说明代码编写思路最近更新的博客华为od2023|什么是华为od,od薪资待遇,od机试题清单华为OD机试真题大全,用Python解华为机试题|机试宝典【华为OD机试】全流程解析+经验分享,题型分享,防作弊指南华为o
在应用开发中,有时候我们需要获取系统的设备信息,用于数据上报和行为分析。那在鸿蒙系统中,我们应该怎么去获取设备的系统信息呢,比如说获取手机的系统版本号、手机的制造商、手机型号等数据。1、获取方式这里分为两种情况,一种是设备信息的获取,一种是系统信息的获取。1.1、获取设备信息获取设备信息,鸿蒙的SDK包为我们提供了DeviceInfo类,通过该类的一些静态方法,可以获取设备信息,DeviceInfo类的包路径为:ohos.system.DeviceInfo.具体的方法如下:ModifierandTypeMethodDescriptionstatic StringgetAbiList()Obt
C#实现简易绘图工具一.引言实验目的:通过制作窗体应用程序(C#画图软件),熟悉基本的窗体设计过程以及控件设计,事件处理等,熟悉使用C#的winform窗体进行绘图的基本步骤,对于面向对象编程有更加深刻的体会.Tutorial任务设计一个具有基本功能的画图软件**·包括简单的新建文件,保存,重新绘图等功能**·实现一些基本图形的绘制,包括铅笔和基本形状等,学习橡皮工具的创建**·设计一个合理舒适的UI界面**注明:你可能需要先了解一些关于winform窗体应用程序绘图的基本知识,以及关于GDI+类和结构的知识二.实验环境Windows系统下的visualstudio2017C#窗体应用程序三.
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