java读取excel文件

package com.execl;

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStream;

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;

/**
 * 
 *                 @描述：测试excel读取
 * 
 *               导入的jar包
 * 
 *               poi-3.8-beta3-20110606.jar
 * 
 *               poi-ooxml-3.8-beta3-20110606.jar
 * 
 *               poi-examples-3.8-beta3-20110606.jar
 * 
 *               poi-excelant-3.8-beta3-20110606.jar
 * 
 *               poi-ooxml-schemas-3.8-beta3-20110606.jar
 * 
 *               poi-scratchpad-3.8-beta3-20110606.jar
 * 
 *               xmlbeans-2.3.0.jar
 * 
 *               dom4j-1.6.1.jar
 * 
 *               jar包官网下载地址：http://poi.apache.org/download.html
 * 
 *               下载poi-bin-3.8-beta3-20110606.zipp
 * 
*/

public class ImportExecl {
/** 总行数 */
private int totalRows = 0;
/** 总列数 */
private int totalCells = 0;
/** 错误信息 */
private String errorInfo;
/** 构造方法 */
public ImportExecl() {
    }


public int getTotalRows() {
return totalRows;
    }
public int getTotalCells() {
return totalCells;
    }
public String getErrorInfo() {
return errorInfo;
    }

public boolean validateExcel(String filePath) {
/** 检查文件名是否为空或者是否是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;
        }
/** 检查文件是否存在 */
        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 {
/** 验证文件是否合法 */
if (!validateExcel(filePath)) {
                System.out.println(errorInfo);
return null;
            }
/** 判断文件的类型，是2003还是2007 */
            boolean isExcel2003 = true;
if (WDWUtil.isExcel2007(filePath)) {
                isExcel2003 = false;
            }
/** 调用本类提供的根据流读取的方法 */
            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();
                }
            }
        }
/** 返回最后读取的结果 */
return dataLst;
    }


public List<List<String>> read(InputStream inputStream, boolean isExcel2003) {
        List<List<String>> dataLst = null;
try {
/** 根据版本选择创建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;
    }


private List<List<String>> read(Workbook wb) {
        List<List<String>> dataLst = new ArrayList<List<String>>();
/** 得到第一个shell */
        Sheet sheet = wb.getSheetAt(0);
/** 得到Excel的行数 */
this.totalRows = sheet.getPhysicalNumberOfRows();
/** 得到Excel的列数 */
if (this.totalRows >= 1 && sheet.getRow(0) != null) {
this.totalCells = sheet.getRow(0).getPhysicalNumberOfCells();
        }
/** 循环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>();
/** 循环Excel的列 */
for (int c = 0; c < this.getTotalCells(); c++) {
                Cell cell = row.getCell(c);
                String cellValue = "";
if (null != cell) {
// 以下是判断数据的类型
switch (cell.getCellType()) {
case HSSFCell.CELL_TYPE_NUMERIC: // 数字
                        cellValue = 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 = "未知类型";
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 {
        ImportExecl poi = new ImportExecl();
// List<List<String>> list = poi.read("d:/aaa.xls");
        List<List<String>> list = poi.read("D:\\Users\\test.xlsx");
if (list != null) {
for (int i = 0; i < list.size(); i++) {
                System.out.print("第" + (i) + "行");
                List<String> cellList = list.get(i);
for (int j = 0; j < cellList.size(); j++) {
// System.out.print("    第" + (j + 1) + "列值：");
                    System.out.print("    " + cellList.get(j));
                }
                System.out.println();
            }

        }

    }

}

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

 需要引入的jar文件：