java 讀取excel 2007 .xlsx文件 poi實現

時間 2019-11-18

標籤 java 讀取 excel xlsx 文件 poi 實現欄目 Java 简体版

原文原文鏈接

工做須要讀取excel裏面的行內容，使用java實現較爲簡單。java

在最開始，嘗試使用 jxl-2.6.12 來實現讀取excel 的行內容。可是按照網上的方法，程序根本沒法正確處理文件流。通過谷姐的一番努力，發現jxl只能支持excel 2000而已（或許我用的方法有誤）。jxl 操做excel 2007 無望，無奈放棄之。apache

以後轉到apache 的poi 庫，看到它的文檔裏面說到，均可以支持office 2010了，對於2007 應該不在話下。果斷轉投poi 的懷抱。windows

poi官方網址：http://poi.apache.org/xss

我下載的是poi 3.10版本。測試

解壓包後，將下面的jar包加入工程。spa

測試poi代碼.net

package rw_excel;

import static org.junit.Assert.*;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

import org.apache.poi.hssf.extractor.ExcelExtractor;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;

public class test_poi {

    @BeforeClass
    public static void setUpBeforeClass() throws Exception {
    }

    @AfterClass
    public static void tearDownAfterClass() throws Exception {
    }

    @Test 
    public void test() throws IOException {
//        fail("Not yet implemented");
        String file_dir = "test.xlsx";
        Workbook book = null;
        book = getExcelWorkbook(file_dir);
        Sheet sheet = getSheetByNum(book,0);
        
        int lastRowNum = sheet.getLastRowNum();
        
        System.out.println("last number is "+ lastRowNum);
        
        for(int i = 0 ; i <= lastRowNum ; i++){
            Row row = null;
            row = sheet.getRow(i);
            if( row != null ){
                System.out.println("reading line is " + i);
                int lastCellNum = row.getLastCellNum();
                System.out.println("lastCellNum is " + lastCellNum );
                Cell cell = null;
                
                for( int j = 0 ; j <= lastCellNum ; j++ ){
                    cell = row.getCell(j);
                    if( cell != null ){
                        String cellValue = cell.getStringCellValue();
                        System.out.println("cell value is \n" + cellValue);
                    }
                }
            }
        }
        
    }

    public static Sheet getSheetByNum(Workbook book,int number){  
        Sheet sheet = null;  
        try {  
            sheet = book.getSheetAt(number);  
//          if(sheet == null){  
//              sheet = book.createSheet("Sheet"+number);  
//          }  
        } catch (Exception e) {  
            throw new RuntimeException(e.getMessage());  
        }  
        return sheet;  
    }  
    public static Workbook getExcelWorkbook(String filePath) throws IOException{  
        Workbook book = null;  
        File file  = null;  
        FileInputStream fis = null;   
          
        try {  
            file = new File(filePath);  
            if(!file.exists()){  
                throw new RuntimeException("文件不存在");  
            }else{  
                fis = new FileInputStream(file);  
                book = WorkbookFactory.create(fis); 
            }  
        } catch (Exception e) {  
            throw new RuntimeException(e.getMessage());  
        } finally {  
            if(fis != null){  
                fis.close();  
            }  
        }  
        return book;  
    } 
//    
}