search
HomeJavajavaTutorialHow to use poi to read Excel in Java

前言

用户可以直接读取本地文件,也可以通过上传文件的形式读取excel

注意:poi对于读取到空白行的时候,会默认的认为是最后一行,将不会再读取空白行下面的数据

第一步导入依赖

        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>4.1.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>4.1.2</version>
        </dependency>

第二步实现测试类+测试

  • 创建ReloadExcelTest .java文件

  • 此时找到excel的文件路径,写文件全名:路径+文件全名

  • 例:String reloadPath=“D:\ExcelTest\test.xlsx”;

  • windows路径之间加\\

  • 测试

package tech.niua.admin.outputvalue.util.reloadexcel;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import tech.niua.admin.outputvalue.domain.OutputValue;
import java.io.IOException;
public class ReloadExcelTest {
    public static void readExcel(String reloadPath) throws IOException {
        //1.获取工作簿
        XSSFWorkbook workbook = new XSSFWorkbook(reloadPath);
        //2.获取工作表
        XSSFSheet sheet = workbook.getSheetAt(0);
        //获取行
        //cell.setCellType(Cell.CELL_TYPE_STRING);    //将不同类型的数据类型转为String
        int lastRowNum = sheet.getLastRowNum();
        for (int i = 1; i <= lastRowNum; i++) {
            OutputValue outputValueEntity = OutputValue.builder().build();
            Row rowValue = sheet.getRow(i);
            //获取每一行中每一个单元格的数据的数据
            for (int j = 0; j < 4; j++) {
                DataFormatter formatter = new DataFormatter();
                String value = formatter.formatCellValue(rowValue.getCell(j));
                System.out.print(value+" ");
            }
            System.out.println();
        }
    }
}

注意:4.1.2版本的poi已经不在使用cell.setCellType(Cell.CELL_TYPE_STRING);这种对于读取到数据设置为String类型的这种形式,将不再支持

改用为:

DataFormatter formatter = new DataFormatter();

String value = formatter.formatCellValue(rowValue.getCell(j));

此时value就是我们读取到的值,可以做一个相应的转换存储到集合或者对象的形式接收

测试

    public static void main(String[] args) throws IOException {
        String reloadPath="D:\\ExcelTest\\test.xlsx";
        ReloadExcelTest.readExcel(reloadPath);
    }

How to use poi to read Excel in Java

How to use poi to read Excel in Java

实际应用

我们可以用集合的形式接收,或者以集合对象的形式接收,这样就能够对于读取到的数据做一个操作处理,以便于后面实现批量上传功能。

----->批量上传:前端页面上传excel文件,由系统自动导入excel的数据到数据库

The above is the detailed content of How to use poi to read Excel in Java. For more information, please follow other related articles on the PHP Chinese website!

Statement
This article is reproduced at:亿速云. If there is any infringement, please contact admin@php.cn delete
JVM performance vs other languagesJVM performance vs other languagesMay 14, 2025 am 12:16 AM

JVM'sperformanceiscompetitivewithotherruntimes,offeringabalanceofspeed,safety,andproductivity.1)JVMusesJITcompilationfordynamicoptimizations.2)C offersnativeperformancebutlacksJVM'ssafetyfeatures.3)Pythonisslowerbuteasiertouse.4)JavaScript'sJITisles

Java Platform Independence: Examples of useJava Platform Independence: Examples of useMay 14, 2025 am 12:14 AM

JavaachievesplatformindependencethroughtheJavaVirtualMachine(JVM),allowingcodetorunonanyplatformwithaJVM.1)Codeiscompiledintobytecode,notmachine-specificcode.2)BytecodeisinterpretedbytheJVM,enablingcross-platformexecution.3)Developersshouldtestacross

JVM Architecture: A Deep Dive into the Java Virtual MachineJVM Architecture: A Deep Dive into the Java Virtual MachineMay 14, 2025 am 12:12 AM

TheJVMisanabstractcomputingmachinecrucialforrunningJavaprogramsduetoitsplatform-independentarchitecture.Itincludes:1)ClassLoaderforloadingclasses,2)RuntimeDataAreafordatastorage,3)ExecutionEnginewithInterpreter,JITCompiler,andGarbageCollectorforbytec

JVM: Is JVM related to the OS?JVM: Is JVM related to the OS?May 14, 2025 am 12:11 AM

JVMhasacloserelationshipwiththeOSasittranslatesJavabytecodeintomachine-specificinstructions,managesmemory,andhandlesgarbagecollection.ThisrelationshipallowsJavatorunonvariousOSenvironments,butitalsopresentschallengeslikedifferentJVMbehaviorsandOS-spe

Java: Write Once, Run Anywhere (WORA) - A Deep Dive into Platform IndependenceJava: Write Once, Run Anywhere (WORA) - A Deep Dive into Platform IndependenceMay 14, 2025 am 12:05 AM

Java implementation "write once, run everywhere" is compiled into bytecode and run on a Java virtual machine (JVM). 1) Write Java code and compile it into bytecode. 2) Bytecode runs on any platform with JVM installed. 3) Use Java native interface (JNI) to handle platform-specific functions. Despite challenges such as JVM consistency and the use of platform-specific libraries, WORA greatly improves development efficiency and deployment flexibility.

Java Platform Independence: Compatibility with different OSJava Platform Independence: Compatibility with different OSMay 13, 2025 am 12:11 AM

JavaachievesplatformindependencethroughtheJavaVirtualMachine(JVM),allowingcodetorunondifferentoperatingsystemswithoutmodification.TheJVMcompilesJavacodeintoplatform-independentbytecode,whichittheninterpretsandexecutesonthespecificOS,abstractingawayOS

What features make java still powerfulWhat features make java still powerfulMay 13, 2025 am 12:05 AM

Javaispowerfulduetoitsplatformindependence,object-orientednature,richstandardlibrary,performancecapabilities,andstrongsecurityfeatures.1)PlatformindependenceallowsapplicationstorunonanydevicesupportingJava.2)Object-orientedprogrammingpromotesmodulara

Top Java Features: A Comprehensive Guide for DevelopersTop Java Features: A Comprehensive Guide for DevelopersMay 13, 2025 am 12:04 AM

The top Java functions include: 1) object-oriented programming, supporting polymorphism, improving code flexibility and maintainability; 2) exception handling mechanism, improving code robustness through try-catch-finally blocks; 3) garbage collection, simplifying memory management; 4) generics, enhancing type safety; 5) ambda expressions and functional programming to make the code more concise and expressive; 6) rich standard libraries, providing optimized data structures and algorithms.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use