4. Apache POI library – Reading an Excel file The below code explains how to read an Excel file using Apache POI libraries. The functiongetCellTypeEnumis deprecated in version 3.15 and will be renamed togetCellTypefrom version 4.0 onwards. ApachePOIExcelRead.java packagecom.mkyong;importorg.a...
In Java, reading an excel file is not easy as the other file formats, like Microsoft Word. However, it can be easily understood why, as excel sheets contain cells. JDK (Java Development Kit) does not allow the user to handle files such as Microsoft Excel and Microsoft Word. Furthermore,...
First, we open the file we want to read and convert it into aFileInputStreamfor further processing.FileInputStreamconstructor throws ajava.io.FileNotFoundExceptionso we need to wrap it around a try-catch block and close the stream at the end: publicstaticvoidreadExcel(String filePath){Filef...
The program shows three different ways of iterating over sheets, rows, and columns in the excel file - importorg.apache.poi.openxml4j.exceptions.InvalidFormatException;importorg.apache.poi.ss.usermodel.*;importjava.io.File;importjava.io.IOException;importjava.util.Iterator;publicclassExcelReader{pub...
title Reading a specific column in Excel section Initialize Start --> Input Excel File section Read Data Input Excel File --> Read Specific Column section End Read Specific Column --> End 操作步骤 第一步:导入需要的库 首先,你需要导入apache poi库来处理Excel文件。
Tip and trick: Read large data from Excel file in C#, VB.NET, Java, PHP, Classic ASP, C++, C++.NET, VB6, VBS, ColdFusion. XLSX, XLSM, XLSB, XLS files by EasyXLS
3. Reading a Large Excel File 3.1. API FastExcelprovides a streaming API that iterates over all rows and providesget()methods to read the cell values according to cell value types. try(Stream<Row>rows=sheet.openStream()){rows.forEach(r->{BigDecimalnum=r.getCellAsNumber(0).orElse(null)...
Java读取大文件处理 使用FileChannel 2. 使用RandomAccessFile 3. 使用BufferedReader ...Java高效读取大文件 [size=large][b]1、在内存中读取[/b][/size] 读取文件行的标准方式是在内存中读取,Guava 和Apache Commons IO都提供了如下所示快速读取文件行的方法: 这种方法带来的问题是文件的所有行都被存放在...
We are reading a file that has 2 sheets and some values in the sheets. Let us use ExcelReaderHandler to read the excel and print the values read in the process. import java.io.File; import java.net.URL; public class ReadExcelUsingSaxParserExample { public static void main(String[] ...
* @param fileName 文件名称 * @return org.apache.poi.ss.usermodel.Workbook **/ public static Workbook getTypeFromExtends(InputStream in , String fileName) throws Exception { String[] str = fileName.split("\\."); //获取文件后缀 String extend = str[1]; ...