package poi;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.DateUtil;
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;
public class Testpoi {
public static void main(String[] args) {
Workbook wb =null;
Sheet sheet = null;
Row row = null;
List<Map<String,String>> list = null;
String cellData = null;
String filePath = "D:\test.xlsx";
String columns[] = {
"name","age","score"}
;
wb = readExcel(filePath);
if(wb != null){
//用来存放表中数据 list = new ArrayList<Map<String,String>>();
//获取第一个sheet sheet = wb.getSheetAt(0);
//获取最大行数 int rownum = sheet.getPhysicalNumberOfRows();
//获取第一行 row = sheet.getRow(0);
//获取最大列数 int colnum = row.getPhysicalNumberOfCells();
for (int i = 1;
i<rownum;
i++) {
Map<String,String> map = new LinkedHashMap<String,String>();
row = sheet.getRow(i);
if(row !=null){
for (int j=0;
j<colnum;
j++){
cellData = (String) getCellFormatValue(row.getCell(j));
map.put(columns[j], cellData);
}
}
else{
break;
}
list.add(map);
}
}
//遍历解析出来的list for (Map<String,String> map : list) {
for (Entry<String,String> entry : map.entrySet()) {
System.out.print(entry.getKey()+":"+entry.getValue()+",");
}
System.out.println();
}
}
//读取excel public static Workbook readExcel(String filePath){
Workbook wb = null;
if(filePath==null){
return null;
}
String extString = filePath.substring(filePath.lastIndexOf("."));
InputStream is = null;
try {
is = new FileInputStream(filePath);
if(".xls".equals(extString)){
return wb = new HSSFWorkbook(is);
}
else if(".xlsx".equals(extString)){
return wb = new XSSFWorkbook(is);
}
else{
return wb = null;
}
}
catch (FileNotFoundException e) {
e.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
}
return wb;
}
public static Object getCellFormatValue(Cell cell){
Object cellValue = null;
if(cell!=null){
//判断cell类型 switch(cell.getCellType()){
case Cell.CELL_TYPE_NUMERIC:{
cellValue = String.valueOf(cell.getNumericCellValue());
break;
}
case Cell.CELL_TYPE_FORMULA:{
//判断cell是否为日期格式 if(DateUtil.isCellDateFormatted(cell)){
//转换为日期格式YYYY-mm-dd cellValue = cell.getDateCellValue();
}
else{
//数字 cellValue = String.valueOf(cell.getNumericCellValue());
}
break;
}
case Cell.CELL_TYPE_STRING:{
cellValue = cell.getRichStringCellValue().getString();
break;
}
default: cellValue = "";
}
}
else{
cellValue = "";
}
return cellValue;
}
}