poi

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;


/**
 * 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 ExecelUtil {


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


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


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 || !(isExcel2003(filePath) || isExcel2007(filePath))) {
System.out.println("filepath error or not excel format,please check filepath:" + filePath);
return false;
}
/** 检查文件是否存在 */
File file = new File(filePath);
if (file == null || !file.exists()) {
System.out.println("file not exist");
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)) {
return null;
}
/** 判断文件的类型，是2003还是2007 */
boolean isExcel2003 = true;
if (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;
Workbook wb = null;
try {
/** 根据版本选择创建Workbook的方式 */
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);


int totalRows = 0;
/** 得到Excel的行数 */
// totalRows = sheet.getPhysicalNumberOfRows();
totalRows = sheet.getLastRowNum();
/** 循环Excel的行 */
for (int r = 0; r <= totalRows; r++) {
Row row = sheet.getRow(r);
if (row == null) {
continue;
}


int totalCells = 0;
/** 得到Excel的列数 */
// totalCells = row.getPhysicalNumberOfCells();
totalCells = row.getLastCellNum();


List<String> rowLst = new ArrayList<String>();
/** 循环Excel的列 */
for (int c = 0; c < totalCells; 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 = "illegal content";
break;
default:
cellValue = "unknown content";
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 {
ExecelUtil poi = new ExecelUtil();
List<List<String>> list = poi.read("D:/d/work/IDEA/bpipe/Bloomberg Data.xlsx");
if (list != null) {
for (int i = 0; i < list.size(); i++) {
System.out.print("line:" + i);
List<String> cellList = list.get(i);
for (int j = 0; j < cellList.size(); j++) {
System.out.print("    " + cellList.get(j));
}
System.out.println();
}
}
}


}