java解析Excel(xls、xlsx两种格式)

https://www.cnblogs.com/hhhshct/p/7255915.html

*********************************************************

一、需要导入的jar

  1.commons-collections4-4.1.jar

  2.poi-3.17-beta1.jar

  3.poi-ooxml-3.17-beta1.jar

  4.poi-ooxml-schemas-3.17-beta1.jar

  5.xmlbeans-2.6.0.jar

maven

  <dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.17</version>
</dependency>

二、主要API

  1.import org.apache.poi.ss.usermodel.Workbook,对应Excel文档;

  2.import org.apache.poi.hssf.usermodel.HSSFWorkbook,对应xls格式的Excel文档;

  3.import org.apache.poi.xssf.usermodel.XSSFWorkbook,对应xlsx格式的Excel文档;

  4.import org.apache.poi.ss.usermodel.Sheet,对应Excel文档中的一个sheet;

  5.import org.apache.poi.ss.usermodel.Row,对应一个sheet中的一行;

  6.import org.apache.poi.ss.usermodel.Cell,对应一个单元格。

三、代码如下

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;
} }

四、运行结果

  代码运行前保证在D盘下有一个test.xlsx文档,不然报文件找不到异常;Excel文档中的表头要和代码中的String columns[] = {"name","age","score"}对应起来。

java解析Excel(xls、xlsx两种格式)

java解析Excel(xls、xlsx两种格式)

例2

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException; import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook; public class TestExcel { public static void main(String[] args) throws IOException{
// 创建工作薄 xlsx
XSSFWorkbook xssWorkbook = new XSSFWorkbook();
// 创建工作表
XSSFSheet sheet = xssWorkbook.createSheet("sheet1"); for (int row = 0; row < 10; row++)
{
XSSFRow rows = sheet.createRow(row);
for (int col = 0; col < 10; col++)
{
// 向工作表中添加数据
rows.createCell(col).setCellValue("data" + row + col);
}
}
//
File xlsFile = new File("poi.xlsx");
FileOutputStream xlsStream = new FileOutputStream(xlsFile);
xssWorkbook.write(xlsStream);
}
}
上一篇:【题解】Tree-String Problem Codeforces 291E AC自动机


下一篇:【android】安卓手机连接电脑了,但是adb devices找不到设备及找到设备但无权限的问题