Javascript 将excel转换为json数组时无法分析日期

我必须为文件上传创建一个api，它是一个xlsx文件。 我已经成功地上传文件使用multer和能够打开它 我需要解析文件并将其转换为数组json对象。 我的代码是：-

let workbook = xlsx.readFile(`uploads/${req.file.filename}`)
    let worksheet = workbook.Sheets['Sheet1']
    let headers = {}
    let data = []
    for (z in worksheet) {
        if (z[0] === '!') continue
        //parse out the column, row, and value
        let tt = 0
        for (let i = 0; i < z.length; i++) {
            if (!isNaN(z[i])) {
                tt = i
                break
            }
            tt = i
        }
        let col = z.substring(0, tt)
        let row = parseInt(z.substring(tt))
        let value = worksheet[z].v
        //store header names
        if (row == 1 && value) {
            headers[col] = value
            continue
        }
        if (!data[row]) data[row] = {}
        data[row][headers[col]] = value
    }
    // drop those first two rows which are empty
    data.shift()
    data.shift()
    console.log(data)
    const studentList = []
    data.map(object => {
        if (object['Year of Enrollment']) object['Year of Enrollment'] = parseInt(object['Year of Enrollment'])
        if (object['Semester']) object['Semester'] = parseInt(object['Semester'])
        if (object['Aadhar Number']) object['Aadhar Number'] = parseInt(object['Aadhar Number'])
        if (object['Phone Number']) object['Phone Number'] = parseInt(object['Phone Number'])
        if (object['Alternate Phone Number']) object['Alternate Phone Number'] = parseInt(object['Alternate Phone Number'])
        let obj = {
            "student_first_name": object['First Name'],
            "student_last_name": object['Last Name'],
            "student_branch": object['Branch'],
            "student_year": object['Year of Enrollment'],
            "student_semester": object['Semester'],
            "student_gender": object['Gender'],
            "student_email": object['Email'],
            "student_address": object['Address'],
            "student_linkedin_profile": object['Linkedin Profile'],
            "student_github_profile": object['Github Profile'],
            "student_aadhar_number": object['Aadhar Number'],
            "student_phone_number": object['Phone Number'],
            "student_date_of_birth": object['Date of Birth'],
            college_id: req.body.college_id
        }
        if (object['Alternate Email']) obj.student_alternate_email = object['Alternate Email']
        if (object['Alternate Phone Number']) obj.student_alternate_phone_number = object['Alternate Phone Number']
        studentList.push(obj)
    })
    console.log(studentList)

在excel文件的“出生日期”字段中，它是20-04-1999 有人能帮助我使输出如下所示：-

[
  {
    student_first_name: 'Ekansh',
    student_last_name: 'Jain',
    student_branch: 'CSE',
    student_year: 2017,
    student_semester: 6,
    student_gender: 'male',
    student_email: '17etcd11@technar.org',
    student_address: 'Udfr',
    student_linkedin_profile: 'http://linkedin.com/ekansh',
    student_github_profile: 'http://github.com/ekansh',
    student_aadhar_number: 123456789011,
    student_phone_number: 7894561230,
    student_date_of_birth: "1999-04-20",
    college_id: 'college-f9NsLo7Ww6oTIlICElG5GZD5JHKTxqbF',
    student_alternate_email: 'ejundertaker@gmail.com'
  }
]

---

在读取xlsx文件（第1行）时，只需将cellDates true作为选项传递，如下代码：-

let workbook = xlsx.readFile(`uploads/${req.file.filename}`, { cellDates: true })
    let worksheet = workbook.Sheets['Sheet1']
    let headers = {}
    let data = []
    for (z in worksheet) {
        if (z[0] === '!') continue
        //parse out the column, row, and value
        let tt = 0
        for (let i = 0; i < z.length; i++) {
            if (!isNaN(z[i])) {
                tt = i
                break
            }
            tt = i
        }
        let col = z.substring(0, tt)
        let row = parseInt(z.substring(tt))
        let value = worksheet[z].v
        //store header names
        if (row == 1 && value) {
            headers[col] = value
            continue
        }
        if (!data[row]) data[row] = {}
        data[row][headers[col]] = value
    }
    // drop those first two rows which are empty
    data.shift()
    data.shift()
    console.log(data)
    const studentList = []
    data.map(object => {
        if (object['Year of Enrollment']) object['Year of Enrollment'] = parseInt(object['Year of Enrollment'])
        if (object['Semester']) object['Semester'] = parseInt(object['Semester'])
        if (object['Aadhar Number']) object['Aadhar Number'] = parseInt(object['Aadhar Number'])
        if (object['Phone Number']) object['Phone Number'] = parseInt(object['Phone Number'])
        if (object['Alternate Phone Number']) object['Alternate Phone Number'] = parseInt(object['Alternate Phone Number'])
        let obj = {
            "student_first_name": object['First Name'],
            "student_last_name": object['Last Name'],
            "student_branch": object['Branch'],
            "student_year": object['Year of Enrollment'],
            "student_semester": object['Semester'],
            "student_gender": object['Gender'],
            "student_email": object['Email'],
            "student_address": object['Address'],
            "student_linkedin_profile": object['Linkedin Profile'],
            "student_github_profile": object['Github Profile'],
            "student_aadhar_number": object['Aadhar Number'],
            "student_phone_number": object['Phone Number'],
            "student_date_of_birth": object['Date of Birth'],
            college_id: req.body.college_id
        }
        if (object['Alternate Email']) obj.student_alternate_email = object['Alternate Email']
        if (object['Alternate Phone Number']) obj.student_alternate_phone_number = object['Alternate Phone Number']
        studentList.push(obj)
    })
    console.log(studentList)

let workbook=xlsx.readFile（`uploads/${req.file.filename}`，{cellDates:true}）
让工作表=工作簿。工作表['Sheet1']
let headers={}
让数据=[]
用于（工作表中的z）{
如果（z[0]=='！'）继续
//解析出列、行和值
设tt=0
for（设i=0；i{
if（object['Year of registration']）object['Year of registration']=parseInt（object['Year of registration']）
if（object['sement']）object['sement']=parseInt（object['sement']）
if（object['Aadhar Number']）object['Aadhar Number']=parseInt（object['Aadhar Number']））
if（object['Phone Number']）object['Phone Number']=parseInt（object['Phone Number']）
if（object['Alternate Phone Number']）object['Alternate Phone Number']=parseInt（object['Alternate Phone Number']））
设obj={
“学生名”：对象['first name']，
“学生姓氏”：对象['last name']，
“学生分支”：对象['branch']，
“学生年”：对象[‘入学年]，
“学生学期”：对象[‘学期]，
“学生性别”：对象[“性别]，
“学生电子邮件”：对象['email']，
“学生地址”：对象[“地址]，
“学生linkedin档案”：对象['linkedin档案]，
“学生档案”：对象['github档案]，
“学生编号”：对象['aadhar编号]，
“学生电话号码”：对象[“电话号码”]，
“学生出生日期”：对象[“出生日期”]，
学院id:req.body.college\u id
}
如果（object['Alternate Email']）obj.student\u Alternate\u Email=object['Alternate Email']
if（object['Alternate Phone Number']）obj.student\u Alternate\u Phone\u Number=object['Alternate Phone Number']
学生列表推送（obj）
})
console.log（学生列表）

日期甚至不像unix时间戳。确保你拿的是正确的东西我又学究了。那个输出不是JSON吗？有关更多信息，请参见。

36270

是Excel存储日期的方式

1999-04-20

。

let workbook = xlsx.readFile(`uploads/${req.file.filename}`, { cellDates: true })
    let worksheet = workbook.Sheets['Sheet1']
    let headers = {}
    let data = []
    for (z in worksheet) {
        if (z[0] === '!') continue
        //parse out the column, row, and value
        let tt = 0
        for (let i = 0; i < z.length; i++) {
            if (!isNaN(z[i])) {
                tt = i
                break
            }
            tt = i
        }
        let col = z.substring(0, tt)
        let row = parseInt(z.substring(tt))
        let value = worksheet[z].v
        //store header names
        if (row == 1 && value) {
            headers[col] = value
            continue
        }
        if (!data[row]) data[row] = {}
        data[row][headers[col]] = value
    }
    // drop those first two rows which are empty
    data.shift()
    data.shift()
    console.log(data)
    const studentList = []
    data.map(object => {
        if (object['Year of Enrollment']) object['Year of Enrollment'] = parseInt(object['Year of Enrollment'])
        if (object['Semester']) object['Semester'] = parseInt(object['Semester'])
        if (object['Aadhar Number']) object['Aadhar Number'] = parseInt(object['Aadhar Number'])
        if (object['Phone Number']) object['Phone Number'] = parseInt(object['Phone Number'])
        if (object['Alternate Phone Number']) object['Alternate Phone Number'] = parseInt(object['Alternate Phone Number'])
        let obj = {
            "student_first_name": object['First Name'],
            "student_last_name": object['Last Name'],
            "student_branch": object['Branch'],
            "student_year": object['Year of Enrollment'],
            "student_semester": object['Semester'],
            "student_gender": object['Gender'],
            "student_email": object['Email'],
            "student_address": object['Address'],
            "student_linkedin_profile": object['Linkedin Profile'],
            "student_github_profile": object['Github Profile'],
            "student_aadhar_number": object['Aadhar Number'],
            "student_phone_number": object['Phone Number'],
            "student_date_of_birth": object['Date of Birth'],
            college_id: req.body.college_id
        }
        if (object['Alternate Email']) obj.student_alternate_email = object['Alternate Email']
        if (object['Alternate Phone Number']) obj.student_alternate_phone_number = object['Alternate Phone Number']
        studentList.push(obj)
    })
    console.log(studentList)