poi处理excel2007和处理excel2003文件
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2022-07-13 12:51:25
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import org.apache.log4j.Logger;
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;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
public class ExcelUtil {
static Logger logger = Logger.getLogger(ExcelUtil.class);
/**
* 默认单元格内容为数字时格式
*/
private static DecimalFormat df = new DecimalFormat("0");
/**
* 默认单元格格式化日期字符串
*/
private static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
/**
* 格式化数字
*/
private static DecimalFormat nf = new DecimalFormat("0.00");
public static ArrayList<ArrayList<Object>> readExcel(File file) {
if (file == null) {
return null;
}
if (file.getName().toLowerCase().endsWith("xlsx")) {
//处理ecxel2007
return readExcel2007(file);
} else {
//处理ecxel2003
return readExcel2003(file);
}
}
/**
* @param file
* @return 将返回结果存储在ArrayList内，存储结构与二位数组类似
* lists.get(0).get(0)表示过去Excel中0行0列单元格
*/
public static ArrayList<ArrayList<Object>> readExcel2003(File file) {
try {
ArrayList<ArrayList<Object>> rowList = new ArrayList<ArrayList<Object>>();
ArrayList<Object> colList;
HSSFWorkbook wb = new HSSFWorkbook(new FileInputStream(file));
HSSFSheet sheet = wb.getSheetAt(0);
HSSFRow row;
HSSFCell cell;
Object value;
for (int i = sheet.getFirstRowNum(), rowCount = 0; rowCount < sheet.getPhysicalNumberOfRows(); i++) {
row = sheet.getRow(i);
colList = new ArrayList<Object>();
if (row == null) {
//当读取行为空时
if (i != sheet.getPhysicalNumberOfRows()) {//判断是否是最后一行
rowList.add(colList);
}
continue;
} else {
rowCount++;
}
for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
cell = row.getCell(j);
if (cell == null || cell.getCellType() == HSSFCell.CELL_TYPE_BLANK) {
//当该单元格为空
if (j != row.getLastCellNum()) {//判断是否是该行中最后一个单元格
colList.add("");
}
continue;
}
switch (cell.getCellType()) {
case XSSFCell.CELL_TYPE_STRING:
// is String type
value = cell.getStringCellValue();
break;
case XSSFCell.CELL_TYPE_NUMERIC:
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()));
}
// is Number type ; DateFormt:
break;
case XSSFCell.CELL_TYPE_BOOLEAN:
// is Boolean type
value = Boolean.valueOf(cell.getBooleanCellValue());
break;
case XSSFCell.CELL_TYPE_BLANK:
// is Blank type
value = "";
break;
default:
logger.info(i + "行" + j + " 列 is default type" + cell.toString());
value = cell.toString();
}// end switch
colList.add(value);
}//end for j
rowList.add(colList);
}//end for i
return rowList;
} catch (Exception e) {
logger.error(e.getMessage(), e);
return null;
}
}
public static ArrayList<ArrayList<Object>> readExcel2007(File file) {
try {
ArrayList<ArrayList<Object>> rowList = new ArrayList<ArrayList<Object>>();
ArrayList<Object> colList;
XSSFWorkbook wb = new XSSFWorkbook(new FileInputStream(file));
XSSFSheet sheet = wb.getSheetAt(0);
XSSFRow row;
XSSFCell cell;
for (int i = sheet.getFirstRowNum(), rowCount = 0; rowCount < sheet.getPhysicalNumberOfRows(); i++) {
row = sheet.getRow(i);
colList = new ArrayList<Object>();
if (row == null) {
//当读取行为空时,判断是否是最后一行
if (i != sheet.getPhysicalNumberOfRows()) {
rowList.add(colList);
}
continue;
} else {
rowCount++;
}
for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
cell = row.getCell(j);
if (cell == null || cell.getCellType() == HSSFCell.CELL_TYPE_BLANK) {
//当该单元格为空,判断是否是该行中最后一个单元格
if (j != row.getLastCellNum()) {
colList.add("");
}
continue;
}
colList.add(cell.toString());
}//end for j
rowList.add(colList);
}//end for i
return rowList;
} catch (Exception e) {
logger.error(e.getMessage(), e);
return null;
}
}
public static void writeExcel(ArrayList<ArrayList<Object>> result, String path) {
if (result == null) {
return;
}
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sheet = wb.createSheet("sheet1");
for (int i = 0; i < result.size(); i++) {
HSSFRow row = sheet.createRow(i);
if (result.get(i) != null) {
for (int j = 0; j < result.get(i).size(); j++) {
HSSFCell cell = row.createCell(j);
cell.setCellValue(result.get(i).get(j).toString());
}
}
}
ByteArrayOutputStream os = new ByteArrayOutputStream();
try {
wb.write(os);
} catch (IOException e) {
e.printStackTrace();
}
byte[] content = os.toByteArray();
File file = new File(path);//Excel文件生成后存储的位置。
OutputStream fos = null;
try {
fos = new FileOutputStream(file);
fos.write(content);
os.close();
fos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
public static DecimalFormat getDf() {
return df;
}
public static void setDf(DecimalFormat df) {
ExcelUtil.df = df;
}
public static SimpleDateFormat getSdf() {
return sdf;
}
public static void setSdf(SimpleDateFormat sdf) {
ExcelUtil.sdf = sdf;
}
public static DecimalFormat getNf() {
return nf;
}
public static void setNf(DecimalFormat nf) {
ExcelUtil.nf = nf;
}
}