java導入 ImportExcel

package com.shili.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.List;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
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.xssf.usermodel.XSSFWorkbook;

public class ImportExcel{
/*
 <!--poi-->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.8</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.8</version>
        </dependency>
        <dependency>
            <groupId>org.apache.xmlbeans</groupId>
            <artifactId>xmlbeans</artifactId>
            <version>2.3.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-scratchpad</artifactId>
            <version>3.8</version>
        </dependency>
*/
	/** 總行數 */
	private int totalRows = 0;
	/** 總列數 */
	private int totalCells = 0;
	/** 錯誤信息 */
	private String errorInfo;

	/** 構造方法 */
	public ImportExcel() {
	}

	public int getTotalRows() {
		return totalRows;
	}

	public int getTotalCells() {
		return totalCells;
	}

	public String getErrorInfo() {
		return errorInfo;
	}

	public boolean validateExcel(String filePath) {
		/** 檢查文件名是否爲空或者是否是Excel格式的文件 */
		if (filePath == null
				|| !(WDWUtil.isExcel2003(filePath) || WDWUtil
						.isExcel2007(filePath))) {
			errorInfo = "文件名不是excel格式";
			return false;
		}
		/** 檢查文件是否存在 */
		File file = new File(filePath);
		if (file == null || !file.exists()) {
			errorInfo = "文件不存在";
			return false;
		}
		return true;
	}

	public List<List<String>> read(String filePath) {
		List<List<String>> dataLst = new ArrayList<List<String>>();
		InputStream is = null;
		try {
			/** 驗證文件是否合法 */
			if (!validateExcel(filePath)) {
				System.out.println(errorInfo);
				return null;
			}
			/** 判斷文件的類型，是2003還是2007 */
			boolean isExcel2003 = true;
			if (WDWUtil.isExcel2007(filePath)) {
				isExcel2003 = false;
			}
			/** 調用本類提供的根據流讀取的方法 */
			File file = new File(filePath);
			is = new FileInputStream(file);
			dataLst = read(is, isExcel2003);
			is.close();
		} catch (Exception ex) {
			ex.printStackTrace();
		} finally {
			if (is != null) {
				try {
					is.close();
				} catch (IOException e) {
					is = null;
					e.printStackTrace();
				}
			}
		}
		/** 返回最後讀取的結果 */
		return dataLst;
	}

	public List<List<String>> read(InputStream inputStream, boolean isExcel2003) {
		List<List<String>> dataLst = null;
		try {
			/** 根據版本選擇創建Workbook的方式 */
			Workbook wb = null;
			if (isExcel2003) {
				wb = new HSSFWorkbook(inputStream);
			} else {
				wb = new XSSFWorkbook(inputStream);
			}
			dataLst = read(wb);
		} catch (IOException e) {

			e.printStackTrace();
		}
		return dataLst;
	}
    
/*
// MultipartFile file 爲springMvc上傳的那個文件

          ImportExcel importExcel = new ImportExcel();
//        InputStream inputStream = file.getInputStream();
            //獲取文件的名字
            String filename = file.getOriginalFilename();
            //根據不同的版本創建不同的對象
            Workbook workbook = null;
            if(filename.endsWith(SUFFIX_2003)){
                workbook = new HSSFWorkbook(file.getInputStream());
            }else if(filename.endsWith(SUFFIX_2007)){
                workbook = new XSSFWorkbook(file.getInputStream());
            }
            List<List<String>> read = importExcel.read(workbook);
返回list數據
*/
	private List<List<String>> read(Workbook wb) {
		DecimalFormat df = new DecimalFormat("0");
		List<List<String>> dataLst = new ArrayList<List<String>>();
		/** 得到第一個shell */
		Sheet sheet = wb.getSheetAt(0);
		/** 得到Excel的行數 */
		this.totalRows = sheet.getPhysicalNumberOfRows();
		/** 得到Excel的列數 */
		if (this.totalRows >= 1 && sheet.getRow(0) != null) {
			this.totalCells = sheet.getRow(0).getPhysicalNumberOfCells();
		}
		/** 循環Excel的行 */
		for (int r = 0; r < this.totalRows; r++) {
			Row row = sheet.getRow(r);
			if (row == null) {
				continue;
			}
			List<String> rowLst = new ArrayList<String>();
			/** 循環Excel的列 */
			for (int c = 0; c < this.getTotalCells(); c++) {
				Cell cell = row.getCell(c);
				String cellValue = "";
				if (null != cell) {
					// 以下是判斷數據的類型
					switch (cell.getCellType()) {
					case HSSFCell.CELL_TYPE_NUMERIC: // 數字
						cellValue = df.format(cell.getNumericCellValue()) + "";
						break;
					case HSSFCell.CELL_TYPE_STRING: // 字符串
						cellValue = cell.getStringCellValue();
						break;
					case HSSFCell.CELL_TYPE_BOOLEAN: // Boolean
						cellValue = cell.getBooleanCellValue() + "";
						break;
					case HSSFCell.CELL_TYPE_FORMULA: // 公式
						cellValue = cell.getCellFormula() + "";
						break;
					case HSSFCell.CELL_TYPE_BLANK: // 空值
						cellValue = "";
						break;
					case HSSFCell.CELL_TYPE_ERROR: // 故障
						cellValue = "非法字符";
						break;
					default:
						cellValue = "未知類型";
						break;
					}
				}
				rowLst.add(cellValue);
			}
			/** 保存第r行的第c列 */
			dataLst.add(rowLst);
		}
		return dataLst;
	}

//	public static void main(String[] args) throws Exception {
//		ImportExcel poi = new ImportExcel();
//		// List<List<String>> list = poi.read("d:/aaa.xls");
//		List<List<String>> list = poi.read("D:\\zhonghe.xls");
//		if (list != null) {
//			for (int i = 0; i < list.size(); i++) {
//				System.out.print("第" + (i) + "行");
//				List<String> cellList = list.get(i);
//				System.out.println("=== 大小 ==== " +cellList.size());
////				for (int j = 0; j < cellList.size(); j++) {
//					// System.out.print("    第" + (j + 1) + "列值：");
//					System.out.print("    " + cellList.get(3));
//					System.out.print("    " + cellList.get(5));
//					System.out.print("    " + cellList.get(9));
//					System.out.print("    " + cellList.get(10));
//					System.out.print("    " + cellList.get(14));
//					System.out.print("    " + cellList.get(17));
//					System.out.print("    " + cellList.get(20));
////				}
//				System.out.println();
//			}
//
//		}
//
//	}

}

class WDWUtil {
    public static boolean isExcel2003(String filePath) {
        return filePath.matches("^.+\\.(?i)(xls)$");
    }
    public static boolean isExcel2007(String filePath) {
        return filePath.matches("^.+\\.(?i)(xlsx)$");
    }
}