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,並解析內容
- * @param file
- * @throws FileNotFoundException
- * @throws IOException
- */
- public static void getExcelAsFile(String file) throws FileNotFoundException, IOException{
- //1.得到Excel常用對象
- // POIFSFileSystem fs = new POIFSFileSystem(new FileInputStream("d:/FTP/test.xls"));
- POIFSFileSystem fs = new POIFSFileSystem(new FileInputStream("d:/FTP/new1.xls"));
- //2.得到Excel工作簿對象
- HSSFWorkbook wb = new HSSFWorkbook(fs);
- //3.得到Excel工作表對象
- HSSFSheet sheet = wb.getSheetAt(0);
- //總行數
- int trLength = sheet.getLastRowNum();
- //4.得到Excel工作表的行
- HSSFRow row = sheet.getRow(0);
- //總列數
- int tdLength = row.getLastCellNum();
- //5.得到Excel工作表指定行的單元格
- HSSFCell cell = row.getCell((short)1);
- //6.得到單元格樣式
- 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工作表指定行的單元格
- HSSFCell cell1 = row1.getCell(j);
- /**
- * 爲了處理:Excel異常Cannot get a text value from a numeric cell
- * 將所有列中的內容都設置成String類型格式
- */
- if(cell1!=null){
- cell1.setCellType(Cell.CELL_TYPE_STRING);
- }
- //獲得每一列中的值
- System.out.print(cell1.getStringCellValue()+"\t\t\t");
- }
- System.out.println();
- }
- }
- /**
- * 創建Excel,並寫入內容
- */
- public static void CreateExcel(){
- //1.創建Excel工作薄對象
- HSSFWorkbook wb = new HSSFWorkbook();
- //2.創建Excel工作表對象
- HSSFSheet sheet = wb.createSheet("new Sheet");
- //3.創建Excel工作表的行
- HSSFRow row = sheet.createRow(6);
- //4.創建單元格樣式
- CellStyle cellStyle =wb.createCellStyle();
- // 設置這些樣式
- 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.創建Excel工作表指定行的單元格
- row.createCell(0).setCellStyle(cellStyle);
- //6.設置Excel工作表的值
- row.createCell(0).setCellValue("aaaa");
- row.createCell(1).setCellStyle(cellStyle);
- row.createCell(1).setCellValue("bbbb");
- //設置sheet名稱和單元格內容
- wb.setSheetName(0,"第一張工作表");
- //設置單元格內容 cell.setCellValue("單元格內容");
- // 最後一步,將文件存到指定位置
- try
- {
- FileOutputStream fout = new FileOutputStream("E:/students.xls");
- wb.write(fout);
- fout.close();
- }
- catch (Exception e)
- {
- e.printStackTrace();
- }
- }
- /**
- * 創建Excel的實例
- * @throws ParseException
- */
- public static void CreateExcelDemo1() throws ParseException{
- List list = new ArrayList();
- SimpleDateFormat df = new SimpleDateFormat("yyyy-mm-dd");
- Student user1 = new Student(1, "張三", 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,創建一個webbook,對應一個Excel文件
- HSSFWorkbook wb = new HSSFWorkbook();
- // 第二步,在webbook中添加一個sheet,對應Excel文件中的sheet
- HSSFSheet sheet = wb.createSheet("學生表一");
- // 第三步,在sheet中添加表頭第0行,注意老版本poi對Excel的行數列數有限制short
- HSSFRow row = sheet.createRow((int) 0);
- // 第四步,創建單元格,並設置值表頭 設置表頭居中
- HSSFCellStyle style = wb.createCellStyle();
- style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 創建一個居中格式
- HSSFCell cell = row.createCell((short) 0);
- cell.setCellValue("學號");
- cell.setCellStyle(style);
- cell = row.createCell((short) 1);
- cell.setCellValue("姓名");
- cell.setCellStyle(style);
- cell = row.createCell((short) 2);
- cell.setCellValue("年齡");
- cell.setCellStyle(style);
- cell = row.createCell((short) 3);
- cell.setCellValue("性別");
- cell.setCellStyle(style);
- cell = row.createCell((short) 4);
- cell.setCellValue("生日");
- cell.setCellStyle(style);
- // 第五步,寫入實體數據 實際應用中這些數據從數據庫得到,
- for (int i = 0; i < list.size(); i++)
- {
- row = sheet.createRow((int) i + 1);
- Student stu = (Student) list.get(i);
- // 第四步,創建單元格,並設置值
- 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,將文件存到指定位置
- 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/系統報表.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,並解析內容 對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常用對象
- // POIFSFileSystem fs = new POIFSFileSystem(new FileInputStream("d:/FTP/new1.xls"));
- // //2.得到Excel工作簿對象
- // 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工作表對象
- Sheet sheet = wb.getSheetAt(0);
- //總行數
- int trLength = sheet.getLastRowNum();
- //4.得到Excel工作表的行
- Row row = sheet.getRow(0);
- //總列數
- int tdLength = row.getLastCellNum();
- //5.得到Excel工作表指定行的單元格
- Cell cell = row.getCell((short)1);
- //6.得到單元格樣式
- 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工作表指定行的單元格
- Cell cell1 = row1.getCell(j);
- /**
- * 爲了處理:Excel異常Cannot get a text value from a numeric cell
- * 將所有列中的內容都設置成String類型格式
- */
- if(cell1!=null){
- cell1.setCellType(Cell.CELL_TYPE_STRING);
- }
- if(j==5&&i<=10){
- cell1.setCellValue("1000");
- }
- //獲得每一列中的值
- System.out.print(cell1+" ");
- }
- System.out.println();
- }
- //將修改後的數據保存
- OutputStream out = new FileOutputStream(file);
- wb.write(out);
- }
- /**
- * 創建Excel,並寫入內容
- */
- public static void CreateExcel(){
- //1.創建Excel工作薄對象
- HSSFWorkbook wb = new HSSFWorkbook();
- //2.創建Excel工作表對象
- HSSFSheet sheet = wb.createSheet("new Sheet");
- //3.創建Excel工作表的行
- HSSFRow row = sheet.createRow(6);
- //4.創建單元格樣式
- CellStyle cellStyle =wb.createCellStyle();
- // 設置這些樣式
- 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.創建Excel工作表指定行的單元格
- row.createCell(0).setCellStyle(cellStyle);
- //6.設置Excel工作表的值
- row.createCell(0).setCellValue("aaaa");
- row.createCell(1).setCellStyle(cellStyle);
- row.createCell(1).setCellValue("bbbb");
- //設置sheet名稱和單元格內容
- wb.setSheetName(0,"第一張工作表");
- //設置單元格內容 cell.setCellValue("單元格內容");
- // 最後一步,將文件存到指定位置
- try
- {
- FileOutputStream fout = new FileOutputStream("E:/students.xls");
- wb.write(fout);
- fout.close();
- }
- catch (Exception e)
- {
- e.printStackTrace();
- }
- }
- /**
- * 創建Excel的實例
- * @throws ParseException
- */
- public static void CreateExcelDemo1() throws ParseException{
- List list = new ArrayList();
- SimpleDateFormat df = new SimpleDateFormat("yyyy-mm-dd");
- Student user1 = new Student(1, "張三", 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,創建一個webbook,對應一個Excel文件
- HSSFWorkbook wb = new HSSFWorkbook();
- // 第二步,在webbook中添加一個sheet,對應Excel文件中的sheet
- HSSFSheet sheet = wb.createSheet("學生表一");
- // 第三步,在sheet中添加表頭第0行,注意老版本poi對Excel的行數列數有限制short
- HSSFRow row = sheet.createRow((int) 0);
- // 第四步,創建單元格,並設置值表頭 設置表頭居中
- HSSFCellStyle style = wb.createCellStyle();
- style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 創建一個居中格式
- HSSFCell cell = row.createCell((short) 0);
- cell.setCellValue("學號");
- cell.setCellStyle(style);
- cell = row.createCell((short) 1);
- cell.setCellValue("姓名");
- cell.setCellStyle(style);
- cell = row.createCell((short) 2);
- cell.setCellValue("年齡");
- cell.setCellStyle(style);
- cell = row.createCell((short) 3);
- cell.setCellValue("性別");
- cell.setCellStyle(style);
- cell = row.createCell((short) 4);
- cell.setCellValue("生日");
- cell.setCellStyle(style);
- // 第五步,寫入實體數據 實際應用中這些數據從數據庫得到,
- for (int i = 0; i < list.size(); i++)
- {
- row = sheet.createRow((int) i + 1);
- Student stu = (Student) list.get(i);
- // 第四步,創建單元格,並設置值
- 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,將文件存到指定位置
- try
- {
- FileOutputStream fout = new FileOutputStream("E:/students.xls");
- wb.write(fout);
- fout.close();
- }
- catch (Exception e)
- {
- e.printStackTrace();
- }
- }
- }
注意:
修改Excel中的某個內容:
- cell1.setCellValue("1000");
保存修改後的Excel文件:
- OutputStream out = new FileOutputStream(file);
- wb.write(out);
文章轉自:http://blog.csdn.net/he90227/article/details/37563497