Excel解析以及POI一些方法的介绍

Posted 2020-11-08 lh-masteryi

/**.
 */

package com.encdata.lihao;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;

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.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

/**.
 *
 * @author admin
 *
 */
public class ExcelParseTwo {
  
  public static void main(String[] args) throws IOException {
    
    File file = new File("D://123.xlsx");
    
    try {
      
      InputStream is = new FileInputStream(file);
      
      Workbook wb = null;  
      
      if (file.getName().endsWith("xls")) {  //Excel 2003  
        
        wb = new HSSFWorkbook(is);  
        
      } else if(file.getName().endsWith("xlsx"))    {  // Excel 2007/2010  
        
        wb = new XSSFWorkbook(is);  
        
      }
      
      int sheetCount = wb.getNumberOfSheets();
      
      for (int i=0;i<sheetCount;i++) {
        
        /*
         * 如果需要跳过第一行目录的化，设置一个count
         */
        
        int rowCount = 0;
        
        Sheet sheet = wb.getSheetAt(i);
        
        for (Row row : sheet) {
          
          /**
           * 如果存在第一行目录的化，则跳过。
           */
          /*if (rowCount == 0) {
            
            rowCount++;
            
            continue;
            
          }*/
          
          StringBuffer sb = new StringBuffer();
          
          /**
           * 方式1--For循环
           */
          /*for (Cell cell : row) {
            
            if(cell.toString() != null) {
              
              sb.append(cell.toString() + "*");
              
            }
            
          }*/
          
          /**
           * 方式1--For循环-2
           */
          /*int cellCount = row.getPhysicalNumberOfCells();
          
          for(int j=0;j<cellCount;j++){
            
            sb.append(row.getCell(j)+"*");
            
          }*/
          
          /**
           * 方式2--迭代
           */
          
          /*Iterator<Cell> cellIterator = row.cellIterator();
          
          while (cellIterator.hasNext()) {
            
            sb.append(cellIterator.next()+"*");
            
          }*/
          
          System.out.println(sb);
          
          /**
           * row.getRowNum()
           * 获取当前row对应的下标
           */
          /*System.out.println(row.getRowNum());*/
          /**
           * row.getPhysicalNumberOfCells()
           * 获取当前row有多少cell
           * row.getCell(i)
           * 获取对应下标下面的cell的value
           */
          /*System.out.println(row.getPhysicalNumberOfCells());
            System.out.println(row.getCell(i));*/
          
          System.out.println(row.getFirstCellNum());
          
          System.out.println(row.getLastCellNum());

        }
        
      }

      
    } catch (FileNotFoundException e) {
      e.printStackTrace();
    }
    
    
    
  }

}