Java POI讀取Office excel (2003,2007)及相關(guān)jar包
poi jar包下載 : http://poi.apache.org/讀取excel 文件的 java 代碼:
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- import java.io.File;
- import java.io.FileInputStream;
- import java.io.FileNotFoundException;
- import java.io.IOException;
- import java.text.DecimalFormat;
- import java.text.SimpleDateFormat;
- import java.util.LinkedList;
- import java.util.List;
- import org.apache.poi.hssf.usermodel.HSSFCell;
- import org.apache.poi.hssf.usermodel.HSSFDateUtil;
- 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.xssf.usermodel.XSSFCell;
- import org.apache.poi.xssf.usermodel.XSSFRow;
- import org.apache.poi.xssf.usermodel.XSSFSheet;
- import org.apache.poi.xssf.usermodel.XSSFWorkbook;
- public class ReadExcel {
- /**
- * 對外提供讀取excel 的方法
- * */
- public static List<List<Object>> readExcel(File file) throws IOException{
- String fileName = file.getName();
- String extension = fileName.lastIndexOf(".")==-1?"":fileName.substring(fileName.lastIndexOf(".")+1);
- if("xls".equals(extension)){
- return read2003Excel(file);
- }else if("xlsx".equals(extension)){
- return read2007Excel(file);
- }else{
- throw new IOException("不支持的文件類型");
- }
- }
- /**
- * 讀取 office 2003 excel
- * @throws IOException
- * @throws FileNotFoundException */
- private static List<List<Object>> read2003Excel(File file) throws IOException{
- List<List<Object>> list = new LinkedList<List<Object>>();
- HSSFWorkbook hwb = new HSSFWorkbook(new FileInputStream(file));
- HSSFSheet sheet = hwb.getSheetAt(0);
- Object value = null;
- HSSFRow row = null;
- HSSFCell cell = null;
- for(int i = sheet.getFirstRowNum();i<= sheet.getPhysicalNumberOfRows();i++){
- row = sheet.getRow(i);
- if (row == null) {
- continue;
- }
- List<Object> linked = new LinkedList<Object>();
- for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
- cell = row.getCell(j);
- if (cell == null) {
- continue;
- }
- DecimalFormat df = new DecimalFormat("0");// 格式化 number String 字符
- SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");// 格式化日期字符串
- DecimalFormat nf = new DecimalFormat("0.00");// 格式化數(shù)字
- switch (cell.getCellType()) {
- case XSSFCell.CELL_TYPE_STRING:
- System.out.println(i+"行"+j+" 列 is String type");
- value = cell.getStringCellValue();
- break;
- case XSSFCell.CELL_TYPE_NUMERIC:
- System.out.println(i+"行"+j+" 列 is Number type ; DateFormt:"+cell.getCellStyle().getDataFormatString());
- if("@".equals(cell.getCellStyle().getDataFormatString())){
- value = df.format(cell.getNumericCellValue());
- } else if("General".equals(cell.getCellStyle().getDataFormatString())){
- value = nf.format(cell.getNumericCellValue());
- }else{
- value = sdf.format(HSSFDateUtil.getJavaDate(cell.getNumericCellValue()));
- }
- break;
- case XSSFCell.CELL_TYPE_BOOLEAN:
- System.out.println(i+"行"+j+" 列 is Boolean type");
- value = cell.getBooleanCellValue();
- break;
- case XSSFCell.CELL_TYPE_BLANK:
- System.out.println(i+"行"+j+" 列 is Blank type");
- value = "";
- break;
- default:
- System.out.println(i+"行"+j+" 列 is default type");
- value = cell.toString();
- }
- if (value == null || "".equals(value)) {
- continue;
- }
- linked.add(value);
- }
- list.add(linked);
- }
- return list;
- }
- /**
- * 讀取Office 2007 excel
- * */
- private static List<List<Object>> read2007Excel(File file) throws IOException {
- List<List<Object>> list = new LinkedList<List<Object>>();
- // 構(gòu)造 XSSFWorkbook 對象,strPath 傳入文件路徑
- XSSFWorkbook xwb = new XSSFWorkbook(new FileInputStream(file));
- // 讀取第一章表格內(nèi)容
- XSSFSheet sheet = xwb.getSheetAt(0);
- Object value = null;
- XSSFRow row = null;
- XSSFCell cell = null;
- for (int i = sheet.getFirstRowNum(); i <= sheet
- .getPhysicalNumberOfRows(); i++) {
- row = sheet.getRow(i);
- if (row == null) {
- continue;
- }
- List<Object> linked = new LinkedList<Object>();
- for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
- cell = row.getCell(j);
- if (cell == null) {
- continue;
- }
- DecimalFormat df = new DecimalFormat("0");// 格式化 number String 字符
- SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");// 格式化日期字符串
- DecimalFormat nf = new DecimalFormat("0.00");// 格式化數(shù)字
- switch (cell.getCellType()) {
- case XSSFCell.CELL_TYPE_STRING:
- System.out.println(i+"行"+j+" 列 is String type");
- value = cell.getStringCellValue();
- break;
- case XSSFCell.CELL_TYPE_NUMERIC:
- System.out.println(i+"行"+j+" 列 is Number type ; DateFormt:"+cell.getCellStyle().getDataFormatString());
- if("@".equals(cell.getCellStyle().getDataFormatString())){
- value = df.format(cell.getNumericCellValue());
- } else if("General".equals(cell.getCellStyle().getDataFormatString())){
- value = nf.format(cell.getNumericCellValue());
- }else{
- value = sdf.format(HSSFDateUtil.getJavaDate(cell.getNumericCellValue()));
- }
- break;
- case XSSFCell.CELL_TYPE_BOOLEAN:
- System.out.println(i+"行"+j+" 列 is Boolean type");
- value = cell.getBooleanCellValue();
- break;
- case XSSFCell.CELL_TYPE_BLANK:
- System.out.println(i+"行"+j+" 列 is Blank type");
- value = "";
- break;
- default:
- System.out.println(i+"行"+j+" 列 is default type");
- value = cell.toString();
- }
- if (value == null || "".equals(value)) {
- continue;
- }
- linked.add(value);
- }
- list.add(linked);
- }
- return list;
- }
- }