JAVA small exercise-9 POI processing Excel file-read XLSX file

package tests;

import java.io.File;
import java.io.FileInputStream;
//import java.io.FileNotFoundException;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.apache.poi.ss.usermodel.CellType;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class ReadXLSX {
    
    
	public static void main(String[] args) {
    
    
		File f = new File("C:\\Users\\Admin\\Desktop\\测试01.xlsx");
		FileInputStream fip;		
		try {
    
    			
			fip = new FileInputStream(f);
			XSSFWorkbook xwb = new XSSFWorkbook(fip);
			XSSFSheet st = xwb.getSheet("新表");//获取表
			int row_sum = st.getLastRowNum();
			for (int i = 0;i<=row_sum;i++){
    
    
				XSSFRow sxr = st.getRow(i);
				int col_sum = sxr.getPhysicalNumberOfCells();
				//String info = "";
				for(int j = 0; j < col_sum;j++){
    
    
					XSSFCell sxc = sxr.getCell(j);
					CellType ct = sxc.getCellType();
					String ctt = ct.toString();
					Object content;
					switch(ctt)
					{
    
    
					case "STRING":
						content = sxc.getStringCellValue();
						break;
					case "NUMERIC":
						int v = (int)sxc.getNumericCellValue();
						if(v>3000){
    
    
							Date d = sxc.getDateCellValue();//单元格为日期类型可用Date接收
							SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日");
							content = sdf.format(d);//格式化日期
						}else{
    
    
							content = v;
						}						
						break;
					default:
						content = "这个数据类型未知";					
					}
					//System.out.print(info);
					System.out.print(content+"\t");
				}				
				System.out.println("");
			}			
			fip.close();
			xwb.close();
		} catch (IOException e) {
    
    
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}
}

Output:

package tests;

import java.io.File;
import java.io.FileInputStream;
//import java.io.FileNotFoundException;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.apache.poi.ss.usermodel.CellType;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class ReadXLSXRe {
    
    
	public static void main(String[] args) {
    
    
		File f = new File("C:\\Users\\Admin\\Desktop\\测试01.xlsx");
		FileInputStream fip;		
		try {
    
    			
			fip = new FileInputStream(f);
			XSSFWorkbook xwb = new XSSFWorkbook(fip);
			XSSFSheet st = xwb.getSheet("新表");//获取表
			int row_sum = st.getLastRowNum();
			
			for (int i = 0;i<=row_sum;i++){
    
    
				String val = "";
				XSSFRow sxr = st.getRow(i);
				int col_sum = sxr.getPhysicalNumberOfCells();
				//String info = "";
				for(int j = 0; j < col_sum;j++){
    
    
					XSSFCell sxc = sxr.getCell(j);
					val = ReadXLSXRe.getValue(sxc);
					System.out.print(val+"\t\t");
				}				
				System.out.println("");
			}			
			fip.close();
			xwb.close();
		} catch (IOException e) {
    
    
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		
	}
	
public static String getValue(XSSFCell xsc){
    
    
	String val = "";
	CellType ct = xsc.getCellType();
	String ctt = ct.toString();
	switch(ctt)
	{
    
    
	case "STRING":
		val = xsc.getStringCellValue();
		break;
	case "NUMERIC":
		int v = (int)xsc.getNumericCellValue();
		if(v>3000){
    
    
			Date d = xsc.getDateCellValue();//单元格为日期类型可用Date接收
			SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日");
			val = sdf.format(d)+"";//格式化日期
		}else{
    
    
			val = v+"";
		}						
		break;
	case "BLANK"://合并单元格只会读到第一个格的值，其余单元格getCellType()返回为“BLANK"
		val = "null";
		break;
		
	default:
		val = "这个数据类型未知";					
	}
	return val;
}
}