package com.imooc.excel; import org.apache.commons.io.FileUtils; import org.apache.poi.hssf.usermodel.HSSFCell; import org.apache.poi.hssf.usermodel.HSSFRow; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; /** * @program: excel_poi * @Author: Ms.Cao * @Description: * POI生成excel文件 * 创建excel写入数据 */ public class PoiExpExcel { public static void main(String[] args) { //定义数组,excel的表头 String[] title = {"id","name","sex"}; //创建Excel工作簿 HSSFWorkbook workbook = new HSSFWorkbook(); //创建一个工作表sheet HSSFSheet sheet = workbook.createSheet(); //创建第一行 HSSFRow row = sheet.createRow(0); HSSFCell cell = null; //插入第一行数据,id,name,sex for (int i = 0; i < title.length; i++) { cell = row.createCell(i); cell.setCellValue(title[i]); } //追加数据 for (int i = 1; i <=10; i++) { HSSFRow nextrow = sheet.createRow(i); HSSFCell cell2 = nextrow.createCell(0); cell2.setCellValue("a" + i); cell2 = nextrow.createCell(1); cell2.setCellValue("user" + i); cell2 = nextrow.createCell(2); cell2.setCellValue("男"); } //创建文件 File file = new File("E:\\poi_test.xls"); try{ file.createNewFile(); //将excel文件内容保存 FileOutputStream stream = FileUtils.openOutputStream(file); //写入到此文件中 workbook.write(stream); //关闭 stream.close(); }catch (IOException e){ e.printStackTrace(); } } } package com.imooc.excel; import org.apache.commons.io.FileUtils; import org.apache.poi.hssf.usermodel.HSSFCell; import org.apache.poi.hssf.usermodel.HSSFRow; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import java.io.File; import java.io.IOException; /** * @program: excel_poi * @Author: Ms.Cao * @Description: * POI解析excel文件(读取) * 两种方式来读取工作表 */ public class poiReadExcel { public static void main(String[] args) { //引入需要解析的excel文件 File file = new File("E:\\poi_test.xls"); try{ //创建Excel,读取文件内容 HSSFWorkbook workbook = new HSSFWorkbook(FileUtils.openInputStream(file)); //获取第一个工作表workbook.getSheet("sheet0");(方式一) // HSSFSheet sheet = workbook.getSheet("Sheet0"); //读取默认第一个工作表sheet(方式二) HSSFSheet sheet = workbook.getSheetAt(0); //读取工作表中的数据 int firstRowNum = 0; //获取sheet中最后一行行号 int lastRowNum = sheet.getLastRowNum(); for (int i = firstRowNum; i <= lastRowNum ; i++) { HSSFRow row = sheet.getRow(i); //获取当前行最后单元格的列号 int lastCellNum = row.getLastCellNum(); for (int j = 0; j < lastCellNum; j++) { //读取cell HSSFCell cell = row.getCell(j); //定义value,读取值 String value= cell.getStringCellValue(); System.out.print(value + " "); } System.out.println(); } }catch (IOException e){ e.printStackTrace(); } } }
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