POI操作Excel详解 HSSF和XSSF两种方式

HSSF方式：

package com.tools.poi.lesson1;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.List;import org.apache.poi.hssf.usermodel.HSSFCell;import org.apache.poi.hssf.usermodel.HSSFCellStyle;import org.apache.poi.hssf.usermodel.HSSFRow;import org.apache.poi.hssf.usermodel.HSSFSheet;import org.apache.poi.hssf.usermodel.HSSFWorkbook;import org.apache.poi.hssf.util.HSSFColor;import org.apache.poi.poifs.filesystem.POIFSFileSystem;import org.apache.poi.ss.usermodel.Cell;import org.apache.poi.ss.usermodel.CellStyle;import com.tools.poi.bean.Student;public class ExcelUtilWithHSSF {public static void main(String[] args) {try {getExcelAsFile("aaa");} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}// try {// CreateExcelDemo1();// } catch (ParseException e) {// e.printStackTrace();// }}/*** 得到Excel，并解析内容* @param file* @throws FileNotFoundException* @throws IOException*/public static void getExcelAsFile(String file) throws FileNotFoundException, IOException{//1.得到Excel常用对象// POIFSFileSystem fs = new POIFSFileSystem(new FileInputStream("d:/FTP/test.xls"));POIFSFileSystem fs = new POIFSFileSystem(new FileInputStream("d:/FTP/new1.xls"));//2.得到Excel工作簿对象HSSFWorkbook wb = new HSSFWorkbook(fs);//3.得到Excel工作表对象HSSFSheet sheet = wb.getSheetAt(0);//总行数int trLength = sheet.getLastRowNum();//4.得到Excel工作表的行HSSFRow row = sheet.getRow(0);//总列数int tdLength = row.getLastCellNum();//5.得到Excel工作表指定行的单元格HSSFCell cell = row.getCell((short)1);//6.得到单元格样式CellStyle cellStyle = cell.getCellStyle();for(int i=0;i<trLength;i++){//得到Excel工作表的行HSSFRow row1 = sheet.getRow(i);for(int j=0;j<tdLength;j++){//得到Excel工作表指定行的单元格HSSFCell cell1 = row1.getCell(j);/*** 为了处理：Excel异常Cannot get a text value from a numeric cell* 将所有列中的内容都设置成String类型格式*/if(cell1!=null){cell1.setCellType(Cell.CELL_TYPE_STRING);}//获得每一列中的值System.out.print(cell1.getStringCellValue()+"\t\t\t");}System.out.println();}}/*** 创建Excel，并写入内容*/public static void CreateExcel(){//1.创建Excel工作薄对象HSSFWorkbook wb = new HSSFWorkbook();//2.创建Excel工作表对象HSSFSheet sheet = wb.createSheet("new Sheet");//3.创建Excel工作表的行 HSSFRow row = sheet.createRow(6);//4.创建单元格样式CellStyle cellStyle =wb.createCellStyle();// 设置这些样式cellStyle.setFillForegroundColor(HSSFColor.SKY_BLUE.index);cellStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);cellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);cellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);cellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);cellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);//5.创建Excel工作表指定行的单元格row.createCell(0).setCellStyle(cellStyle);//6.设置Excel工作表的值row.createCell(0).setCellValue("aaaa");row.createCell(1).setCellStyle(cellStyle);row.createCell(1).setCellValue("bbbb");//设置sheet名称和单元格内容wb.setSheetName(0,"第一张工作表");//设置单元格内容 cell.setCellValue("单元格内容");// 最后一步，将文件存到指定位置try{FileOutputStream fout = new FileOutputStream("E:/students.xls");wb.write(fout);fout.close();}catch (Exception e){e.printStackTrace();}}/*** 创建Excel的实例* @throws ParseException */public static void CreateExcelDemo1() throws ParseException{List list = new ArrayList();SimpleDateFormat df = new SimpleDateFormat("yyyy-mm-dd");Student user1 = new Student(1, "张三", 16,true, df.parse("1997-03-12"));Student user2 = new Student(2, "李四", 17,true, df.parse("1996-08-12"));Student user3 = new Student(3, "王五", 26,false, df.parse("1985-11-12"));list.add(user1);list.add(user2);list.add(user3);// 第一步，创建一个webbook，对应一个Excel文件HSSFWorkbook wb = new HSSFWorkbook();// 第二步，在webbook中添加一个sheet,对应Excel文件中的sheetHSSFSheet sheet = wb.createSheet("学生表一");// 第三步，在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制shortHSSFRow row = sheet.createRow((int) 0);// 第四步，创建单元格，并设置值表头 设置表头居中HSSFCellStyle style = wb.createCellStyle();style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 创建一个居中格式HSSFCell cell = row.createCell((short) 0);cell.setCellValue("学号");cell.setCellStyle(style);cell = row.createCell((short) 1);cell.setCellValue("姓名");cell.setCellStyle(style);cell = row.createCell((short) 2);cell.setCellValue("年龄");cell.setCellStyle(style);cell = row.createCell((short) 3);cell.setCellValue("性别");cell.setCellStyle(style);cell = row.createCell((short) 4);cell.setCellValue("生日");cell.setCellStyle(style);// 第五步，写入实体数据 实际应用中这些数据从数据库得到，for (int i = 0; i < list.size(); i++){row = sheet.createRow((int) i + 1);Student stu = (Student) list.get(i);// 第四步，创建单元格，并设置值row.createCell((short) 0).setCellValue((double) stu.getId());row.createCell((short) 1).setCellValue(stu.getName());row.createCell((short) 2).setCellValue((double) stu.getAge());row.createCell((short)3).setCellValue(stu.getSex()==true?"男":"女");cell = row.createCell((short) 4);cell.setCellValue(new SimpleDateFormat("yyyy-mm-dd").format(stu.getBirthday()));}// 第六步，将文件存到指定位置try{FileOutputStream fout = new FileOutputStream("E:/students.xls");wb.write(fout);fout.close();}catch (Exception e){e.printStackTrace();}}}

XSSF方式：

package com.tools.poi.lesson1;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.List;import org.apache.poi.hssf.usermodel.HSSFCell;import org.apache.poi.hssf.usermodel.HSSFCellStyle;import org.apache.poi.hssf.usermodel.HSSFRow;import org.apache.poi.hssf.usermodel.HSSFSheet;import org.apache.poi.hssf.usermodel.HSSFWorkbook;import org.apache.poi.hssf.util.HSSFColor;import org.apache.poi.openxml4j.exceptions.InvalidFormatException;import org.apache.poi.poifs.filesystem.POIFSFileSystem;import org.apache.poi.ss.usermodel.Cell;import org.apache.poi.ss.usermodel.CellStyle;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.ss.usermodel.WorkbookFactory;import org.apache.poi.ss.util.WorkbookUtil;import com.tools.poi.bean.Student;public class ExcelUtilWithXSSF {public static void main(String[] args) {try {getExcelAsFile("d:/FTP/系统报表.xls");} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} catch (InvalidFormatException e) {e.printStackTrace();}// try {// CreateExcelDemo1();// } catch (ParseException e) {// e.printStackTrace();// }}/*** 得到Excel，并解析内容 对及以上版本 使用XSSF解析* @param file* @throws FileNotFoundException* @throws IOException* @throws InvalidFormatException */public static void getExcelAsFile(String file) throws FileNotFoundException, IOException, InvalidFormatException{// //1.得到Excel常用对象// POIFSFileSystem fs = new POIFSFileSystem(new FileInputStream("d:/FTP/new1.xls"));// //2.得到Excel工作簿对象// HSSFWorkbook wb = new HSSFWorkbook(fs);InputStream ins = null; Workbook wb = null; ins=new FileInputStream(new File(file)); //ins= ExcelService.class.getClassLoader().getResourceAsStream(filePath); wb = WorkbookFactory.create(ins); ins.close(); //3.得到Excel工作表对象Sheet sheet = wb.getSheetAt(0);//总行数int trLength = sheet.getLastRowNum();//4.得到Excel工作表的行Row row = sheet.getRow(0);//总列数int tdLength = row.getLastCellNum();//5.得到Excel工作表指定行的单元格Cell cell = row.getCell((short)1);//6.得到单元格样式CellStyle cellStyle = cell.getCellStyle();for(int i=5;i<trLength;i++){//得到Excel工作表的行Row row1 = sheet.getRow(i);for(int j=0;j<tdLength;j++){//得到Excel工作表指定行的单元格Cell cell1 = row1.getCell(j);/*** 为了处理：Excel异常Cannot get a text value from a numeric cell* 将所有列中的内容都设置成String类型格式*/if(cell1!=null){cell1.setCellType(Cell.CELL_TYPE_STRING);}if(j==5&&i<=10){cell1.setCellValue("1000");}//获得每一列中的值System.out.print(cell1+" ");}System.out.println();}//将修改后的数据保存OutputStream out = new FileOutputStream(file);wb.write(out);}/*** 创建Excel，并写入内容*/public static void CreateExcel(){//1.创建Excel工作薄对象HSSFWorkbook wb = new HSSFWorkbook();//2.创建Excel工作表对象HSSFSheet sheet = wb.createSheet("new Sheet");//3.创建Excel工作表的行 HSSFRow row = sheet.createRow(6);//4.创建单元格样式CellStyle cellStyle =wb.createCellStyle();// 设置这些样式cellStyle.setFillForegroundColor(HSSFColor.SKY_BLUE.index);cellStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);cellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);cellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);cellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);cellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);//5.创建Excel工作表指定行的单元格row.createCell(0).setCellStyle(cellStyle);//6.设置Excel工作表的值row.createCell(0).setCellValue("aaaa");row.createCell(1).setCellStyle(cellStyle);row.createCell(1).setCellValue("bbbb");//设置sheet名称和单元格内容wb.setSheetName(0,"第一张工作表");//设置单元格内容 cell.setCellValue("单元格内容");// 最后一步，将文件存到指定位置try{FileOutputStream fout = new FileOutputStream("E:/students.xls");wb.write(fout);fout.close();}catch (Exception e){e.printStackTrace();}}/*** 创建Excel的实例* @throws ParseException */public static void CreateExcelDemo1() throws ParseException{List list = new ArrayList();SimpleDateFormat df = new SimpleDateFormat("yyyy-mm-dd");Student user1 = new Student(1, "张三", 16,true, df.parse("1997-03-12"));Student user2 = new Student(2, "李四", 17,true, df.parse("1996-08-12"));Student user3 = new Student(3, "王五", 26,false, df.parse("1985-11-12"));list.add(user1);list.add(user2);list.add(user3);// 第一步，创建一个webbook，对应一个Excel文件HSSFWorkbook wb = new HSSFWorkbook();// 第二步，在webbook中添加一个sheet,对应Excel文件中的sheetHSSFSheet sheet = wb.createSheet("学生表一");// 第三步，在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制shortHSSFRow row = sheet.createRow((int) 0);// 第四步，创建单元格，并设置值表头 设置表头居中HSSFCellStyle style = wb.createCellStyle();style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 创建一个居中格式HSSFCell cell = row.createCell((short) 0);cell.setCellValue("学号");cell.setCellStyle(style);cell = row.createCell((short) 1);cell.setCellValue("姓名");cell.setCellStyle(style);cell = row.createCell((short) 2);cell.setCellValue("年龄");cell.setCellStyle(style);cell = row.createCell((short) 3);cell.setCellValue("性别");cell.setCellStyle(style);cell = row.createCell((short) 4);cell.setCellValue("生日");cell.setCellStyle(style);// 第五步，写入实体数据 实际应用中这些数据从数据库得到，for (int i = 0; i < list.size(); i++){row = sheet.createRow((int) i + 1);Student stu = (Student) list.get(i);// 第四步，创建单元格，并设置值row.createCell((short) 0).setCellValue((double) stu.getId());row.createCell((short) 1).setCellValue(stu.getName());row.createCell((short) 2).setCellValue((double) stu.getAge());row.createCell((short)3).setCellValue(stu.getSex()==true?"男":"女");cell = row.createCell((short) 4);cell.setCellValue(new SimpleDateFormat("yyyy-mm-dd").format(stu.getBirthday()));}// 第六步，将文件存到指定位置try{FileOutputStream fout = new FileOutputStream("E:/students.xls");wb.write(fout);fout.close();}catch (Exception e){e.printStackTrace();}}}