[Training Video - 6] [File Reading] [Java] Read Excel File Using Apache POI API

读取以下两种格式的Excel ： *.xls  and *.xlsx

用Apache POI API来实现，需要用到 HSSF 和 XSSF 的类库

HSSF is the POI Project's pure Java implementation of the Excel '97(-2007) (.xls) file format.

XSSF is the POI Project's pure Java implementation of the Excel 2007 OOXML (.xlsx) file format.

These 4 JARs are needed to read excel:

将这四个JAR包加入到Java Build Path里面去

Java code to read Excel :

package com.file.properties;

import java.io.*;
import java.util.Iterator;

import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

class ReadExcel
{
static void readXlsx(File inputFile)
{
try
{
        // Get the workbook instance for XLSX file
        XSSFWorkbook wb = new XSSFWorkbook(new FileInputStream(inputFile));

        // Get first sheet from the workbook
        XSSFSheet sheet = wb.getSheetAt(0);

        Row row;
        Cell cell;

        // Iterate through each rows from first sheet
        Iterator<Row> rowIterator = sheet.iterator();

        while (rowIterator.hasNext())
        {
                row = rowIterator.next();

                // For each row, iterate through each columns
                Iterator<Cell> cellIterator = row.cellIterator();

                while (cellIterator.hasNext())
                {
                cell = cellIterator.next();

                switch (cell.getCellType())
                {

                case Cell.CELL_TYPE_BOOLEAN:
                        System.out.println(cell.getBooleanCellValue());
                        break;

                case Cell.CELL_TYPE_NUMERIC:
                        System.out.println(cell.getNumericCellValue());
                        break;

                case Cell.CELL_TYPE_STRING:
                        System.out.println(cell.getStringCellValue());
                        break;

                case Cell.CELL_TYPE_BLANK:
                        System.out.println(" ");
                        break;

                default:
                        System.out.println(cell);

                }
                }
        }
}
catch (Exception e)
{
        System.err.println("Exception :" + e.getMessage());
}
}

static void readXls(File inputFile)
{
try
{
        // Get the workbook instance for XLS file
        HSSFWorkbook workbook = new HSSFWorkbook(new FileInputStream(inputFile));
        // Get first sheet from the workbook
        HSSFSheet sheet = workbook.getSheetAt(0);
        Cell cell;
        Row row;

        // Iterate through each rows from first sheet
        Iterator<Row> rowIterator = sheet.iterator();

        while (rowIterator.hasNext())
        {
                row = rowIterator.next();

                // For each row, iterate through each columns
                Iterator<Cell> cellIterator = row.cellIterator();

                while (cellIterator.hasNext())
                {
                cell = cellIterator.next();

                switch (cell.getCellType())
                {

                case Cell.CELL_TYPE_BOOLEAN:
                        System.out.println(cell.getBooleanCellValue());
                        break;

                case Cell.CELL_TYPE_NUMERIC:
                        System.out.println(cell.getNumericCellValue());
                        break;

                case Cell.CELL_TYPE_STRING:
                        System.out.println(cell.getStringCellValue());
                        break;

                case Cell.CELL_TYPE_BLANK:
                        System.out.println(" ");
                        break;

                default:
                        System.out.println(cell);
                }
                }
        }

} 

catch (FileNotFoundException e)
{
        System.err.println("Exception" + e.getMessage());
}
catch (IOException e)
{
        System.err.println("Exception" + e.getMessage());
}
}

public static void main(String[] args)
{
        File inputFile = new File("D:\\SoapUIStudy\\input.xls");
        File inputFile2 = new File("D:\\SoapUIStudy\\input.xlsx");
        readXls(inputFile);
        readXlsx(inputFile2);
}
}

 Result :

User in xls
Password in xls
U1
P1
U2
P2
User in xlsx
Password in xlsx
User1
Password1
User2
Password2
User3
Password3