本文主要是介绍POI操作excel详解,HSSF和XSSF两种方式的区别,希望对大家解决编程问题提供一定的参考价值,需要的开发者们随着小编来一起学习吧!
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sheet
- HSSFSheet 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short
- HSSFRow 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();
- }
- }
- }
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2007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sheet
- HSSFSheet 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short
- HSSFRow 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();
- }
- }
- }
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2007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();}}
}
注意:
修改Excel中的某个内容:
- cell1.setCellValue(“1000”);
cell1.setCellValue("1000");
保存修改后的Excel文件:
- OutputStream out = new FileOutputStream(file);
- wb.write(out);
OutputStream out = new FileOutputStream(file);
wb.write(out);
轉自【http://blog.csdn.net/he90227/article/details/37563497】
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