亚洲国产日韩欧美一区二区三区,精品亚洲国产成人av在线,国产99视频精品免视看7,99国产精品久久久久久久成人热,欧美日韩亚洲国产综合乱

? Java Java??? Java?? Excel ??? ???? ??

Java?? Excel ??? ???? ??

Nov 16, 2019 pm 01:13 PM
?? ?? java ??

Java?? Excel ??? ???? ??

Java? POI? ???? Excel ??? ?????. ?? ????? ??? ???? xlsx ??? ?????.

POI ??? ??? ????

?? ?????? POI? ???????. ? ??? ??? ??? 3.17??, ???? ? ???? poi-bin-3.17.zip???. ???? ??? ?? ???? ?? ????? ???? ??? ?????, ??? ????? ????? ??? ??? ???? ?????.

poi-3.17 ??? jar ???? poi-3.17lib*.jar ???? ?? ????? WEB-INFlib? ???? ?????? ??? ??? ?????.

Java?? Excel ??? ???? ??

Java ??? ?? ??? ?????. ??? hssf? xls ???? xssf? xlsx ?????

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.DataFormatter;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

Excel ?? ??

HSSFWorkbook workbook = null;
try {
    // 讀取Excel文件
    InputStream inputStream = new FileInputStream('c:\test.xlsx');
    workbook = new HSSFWorkbook(inputStream);
    inputStream.close();
} catch (Exception e) {
    e.printStackTrace();
}

Excel ?? ????

// 遍歷Excel Sheetfor (int numSheet = 0; numSheet < workbook.getNumberOfSheets(); numSheet++) {
    workbook.getSheetAt(numSheet);
}

? ?? 

HSSFSheet sheet = workbook.getSheetAt(0);
if (sheet != null) {
    // 循環(huán)行
    for     (int rowNum = 1; rowNum <= sheet.getLastRowNum(); rowNum++) {
        HSSFRow row = sheet.getRow(rowNum);
        if (row == null) {
            continue;// 忽略并繼續(xù)讀取
        }
        HSSFCell cell = row.getCell(0);
      if (cell == null) {
            continue;
        }
      //System.out.println(&#39;cell.getStringCellValue0():&#39; + cell.getStringCellValue());
        cell = row.getCell(1);
       if (cell == null) {
            continue;
       }
        //System.out.println(&#39;cell.getStringCellValue1():&#39; + cell.getStringCellValue());
   }
}

POI?? C?? ? “Poi”?? ??? ?? ??? ? ?? ??? ??????annot get a text value from a numeric cell “Poi”

導入Excel文件時，如果某列是數(shù)值類型，直接通過cell.getStringCellValue()會報Cannot get a text value from a numeric cell “Poi”

Excel ??? ??? ? ?? ?? ??? ?? ? ?? ?????. code>cell.getStringCellValue()? ?? ? "Poi"?? ??? ?? ??? ? ???? ??? ?????.

???: 

DataFormatter formatter = new DataFormatter();
String val = formatter.formatCellValue(sheet.getRow(col).getCell(row));
?? ????:
Java ????????

? ??? Java?? Excel ??? ???? ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!

? ????? ??
? ?? ??? ????? ???? ??? ??????, ???? ?????? ????. ? ???? ?? ???? ?? ??? ?? ????. ???? ??? ???? ???? ??? ?? admin@php.cn?? ?????.

? AI ??

Undresser.AI Undress

Undresser.AI Undress

???? ?? ??? ??? ?? AI ?? ?

AI Clothes Remover

AI Clothes Remover

???? ?? ???? ??? AI ?????.

Video Face Swap

Video Face Swap

??? ??? AI ?? ?? ??? ???? ?? ???? ??? ?? ????!

???

??? ??

???++7.3.1

???++7.3.1

???? ?? ?? ?? ???

SublimeText3 ??? ??

SublimeText3 ??? ??

??? ??, ???? ?? ????.

???? 13.0.1 ???

???? 13.0.1 ???

??? PHP ?? ?? ??

???? CS6

???? CS6

??? ? ?? ??

SublimeText3 Mac ??

SublimeText3 Mac ??

? ??? ?? ?? ?????(SublimeText3)

???

??? ??

??? ????
1597
29
PHP ????
1488
72
???
vscode settings.json ?? vscode settings.json ?? Aug 01, 2025 am 06:12 AM

settings.json ??? ??? ?? ?? ?? ?? ?? ??? ??? VSCODE ??? ??? ???? ? ?????. 1. ??? ?? ?? : Windows? C : \ Users \\ AppData \ Roaming \ Code \ User \ Settings.json, MacOS IS /users//library/applicationsupport/code/user/settings.json, linux? /home//.config/code/user/settings.json; 2. Workspace ?? ?? : .vscode/settings project root ????

JDBC? Java? ??? ???? ??? ?????? JDBC? Java? ??? ???? ??? ?????? Aug 02, 2025 pm 12:29 PM

JDBC ????? ???? ????? ?? ?? ?? ??? ?? ?? ??? ?? ? ?? ??? ?? ?? ?? ??? ???????. 1. ????? ????? Conn.SetAutoCommit (False)?? ??????. 2. ??? ? ????? ?? ?? SQL ??? ?????. 3. ?? ??? ??? ?? Conn.commit ()?? ???? ??? ???? ???? ?? ??? ???? Conn.Rollback ()?? ??????. ???, ? ??? ???? ????, ??? ???? ????, ?? ??? ??? ?? ??? ??? ???? ? ???????. ?? ?? ?? ???? ????? ??? ???? ?? ?? ???? ???? ??? ????? ?? ??? ??? ? ?? ???? ?? ????.

???? ??? ?? Java? ??? ?? ??? ? ???? ??? ?? Java? ??? ?? ??? ? Aug 01, 2025 am 05:53 AM

??? (DI) ISADESIGNPATTORNWHEREWHEDROUDIVESTESTESTETESTERGROWCONSTRUCTOR, 2.SPRINGFRAMEWWERTHUSENONTATIONS? ??@autowiredWithjava ?? CONCUTTATIONS LIKERWITHCONSTRUCTOR, ORFIELDINGESS.2.SPRINGFRAMEWWERTHUSENNOTATIONS

Java? ??? ?? ??? ?????? Java? ??? ?? ??? ?????? Aug 02, 2025 am 02:38 AM

?? ?? ? ?? ???? ???? ?? Java.Time ???? ???? ??????. 2. LocalDate, LocalDateTime ? LocalTime? ?? ?? ??? ??? ?????. 3. () ???? ???? ?? ??? ??? ????. 4. ???/???? ??? ???? ??? ????? ??? ??????. 5. ZonedDateTime ? Zoneid? ???? ???? ??????. 6. DateTimeFormatter? ?? ?? ? ?? ?? ?? ???; 7. ??? ?? ?? ?? ??? ????? ?? ??????. ?? Java? ?? ??? ???? ??? ??? ???? Java.Timeapi ??? ?? ??? ???????.

JVM (Java Virtual Machine) ?? ?? JVM (Java Virtual Machine) ?? ?? Aug 01, 2025 am 06:31 AM

thejvmenablesjava? "WriteOnce, Runynywhere"??? ?? excodecodethroughfourmaincomponents : 1. theclassloadersubsystemloads, ??, ? intinitializes.classfilesusingbootsprap, extension, andapplicationclassloaders, ensuringsecureandlazyclasloa

Google Chrome? ?? ??? ? ? ???? Google Chrome? ?? ??? ? ? ???? Aug 01, 2025 am 05:24 AM

chromecanopenlocalfiles likehtmlandpdfsbyusing "OpenFile"OrdraggingTheMintoTheBrowser; ensuretHeadDressStartSwithFile : ///; 2.SecurityRestrictionSblockajax, LocalStorage, andcross-folderaccessonfile : //; usealocalsertpython-mhtpython-mhtpython-mhtppy

Java ??? ?? ?? : Spring Boot vs Quarkus vs Micronaut Java ??? ?? ?? : Spring Boot vs Quarkus vs Micronaut Aug 04, 2025 pm 12:48 PM

Pre-FormancetArtUptimeMoryUsage, Quarkusandmicronautleadduetocompile-timeprocessingandgraalvsupport, withquarkusoftenperforminglightbetterine serverless sinarios.2.thyvelopecosyste,

???? ?? ? ??? ?? ???? ?? ? ??? ?? Aug 01, 2025 am 06:40 AM

NetworkPortSandfirewallsworkTogetToenableCommunication whileensuringsecurity.1.networkportSarevirtualendpointsnumbered0–65535, Withwell-nownports like80 (http), 443 (https), 22 (ssh) ? 25 (smtp) ?? (specservices

See all articles