Java POI读取/导出Excel数据

public void exportExcelOutputStream(OutputStream os,
List<BusinessIncome> listData, String fileName,
String accountingTimeName, String companyName) {
try {
// 创建Excel文档
HSSFWorkbook workbook = new HSSFWorkbook();
// 创建sheet
HSSFSheet sheet = workbook.createSheet("营业收入");
// 创建标题
HSSFCellStyle style = workbook.createCellStyle();
HSSFCellStyle style1 = workbook.createCellStyle();
HSSFCellStyle style2 = workbook.createCellStyle();

style.setAlignment(HSSFCellStyle.ALIGN_CENTER); //创建一个居中格式
style.setBorderTop(HSSFCellStyle.SOLID_FOREGROUND);
style.setBorderLeft(HSSFCellStyle.SOLID_FOREGROUND);
style.setBorderRight(HSSFCellStyle.SOLID_FOREGROUND);
style.setBorderBottom(HSSFCellStyle.SOLID_FOREGROUND);

style1.setAlignment(HSSFCellStyle.ALIGN_RIGHT); //创建一个居右格式
style1.setBorderTop(HSSFCellStyle.SOLID_FOREGROUND);
style1.setBorderLeft(HSSFCellStyle.SOLID_FOREGROUND);
style1.setBorderRight(HSSFCellStyle.SOLID_FOREGROUND);
style1.setBorderBottom(HSSFCellStyle.SOLID_FOREGROUND);

style2.setAlignment(HSSFCellStyle.ALIGN_LEFT); //创建一个居中格式
style2.setBorderTop(HSSFCellStyle.SOLID_FOREGROUND);
style2.setBorderLeft(HSSFCellStyle.SOLID_FOREGROUND);
style2.setBorderRight(HSSFCellStyle.SOLID_FOREGROUND);
style2.setBorderBottom(HSSFCellStyle.SOLID_FOREGROUND);
// 设置单元格字体
HSSFFont font = workbook.createFont();
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
font.setFontName("宋体");
font.setFontHeight((short) 200);
style.setFont(font);

// 添加查询条件
sheet.addMergedRegion(new Region(0,(short)0,0,(short)2));
sheet.addMergedRegion(new Region(0,(short)3,0,(short)5));
HSSFRow row0 = sheet.createRow(0);
HSSFCell cell0 = row0.createCell(0);
cell0.setCellValue(new HSSFRichTextString("编制公司："+companyName));
cell0 = row0.createCell(3);
cell0.setCellValue(new HSSFRichTextString("会计期间："+accountingTimeName));

// 创建列表头
HSSFRow row1 = sheet.createRow(1);
row1.setHeight((short) 300);
HSSFCell cell = row1.createCell(0);
cell.setCellValue(new HSSFRichTextString("业务类型"));
cell.setCellStyle(style);
cell = row1.createCell(1);
cell.setCellValue(new HSSFRichTextString("营业收入(元)"));
cell.setCellStyle(style);
cell = row1.createCell(2);
cell.setCellValue(new HSSFRichTextString("营业收入占比(%)"));
cell.setCellStyle(style);
cell = row1.createCell(3);
cell.setCellValue(new HSSFRichTextString("营业成本(元)"));
cell.setCellStyle(style);
cell = row1.createCell(4);
cell.setCellValue(new HSSFRichTextString("毛利(元)"));
cell.setCellStyle(style);
cell = row1.createCell(5);
cell.setCellValue(new HSSFRichTextString("毛利率(%)"));
cell.setCellStyle(style);

//循环表数据
int a = 2;
for (int i = 0; i < listData.size(); i++) {
BusinessIncome stock = (BusinessIncome) listData.get(i);
HSSFRow row = sheet.createRow(a);
row.setHeight((short) 300);
cell = row.createCell(0);
cell.setCellValue(stock.getProduct());
cell.setCellStyle(style2);
cell = row.createCell(1);
cell.setCellValue(Double.valueOf(stock.getBusinessIncome()+""));
cell.setCellStyle(style1);
cell = row.createCell(2);
cell.setCellValue(Double.valueOf(stock.getPercent()+""));
cell.setCellStyle(style1);
cell = row.createCell(3);
cell.setCellValue(Double.valueOf(stock.getCosts()+""));
cell.setCellStyle(style1);
cell = row.createCell(4);
cell.setCellValue(Double.valueOf(stock.getGrossMargin()+""));
cell.setCellStyle(style1);
cell = row.createCell(5);
cell.setCellValue(Double.valueOf(stock.getGrossMarginRate()+""));
cell.setCellStyle(style1);

a++;
}
sheet.setColumnWidth((short)0,4000);
sheet.setColumnWidth((short)1,4000);
sheet.setColumnWidth((short)2,4000);
sheet.setColumnWidth((short)3,4000);
sheet.setColumnWidth((short)4,4000);
sheet.setColumnWidth((short)5,4000);

workbook.write(os);
os.flush();
} catch (IOException e) {
e.printStackTrace();
}
}

public String execute() throws Exception {
String jsonStr = "";
try {
InputStream is = new FileInputStream(upload[0]);
HSSFWorkbook workbook = new HSSFWorkbook(is);
HSSFSheet sheet = workbook.getSheetAt(0);

// 获取到Excel文件中的所有行数
int rows = sheet.getPhysicalNumberOfRows();
for (int i = 0; i < rows; i++) {
// 读取左上端单元格
HSSFRow row = sheet.getRow(i + 1);
if (null != row) {
String value = "";
// 获取到Excel文件中的所有的列
int cells = sheet.getRow(1).getPhysicalNumberOfCells();
// 遍历所有列
for (int j = 0; j < cells; j++) {
// 获取到列的值
HSSFCell cell = row.getCell(j);

if (cell != null) {
switch (cell.getCellType()) {
case XSSFCell.CELL_TYPE_BLANK: // 空值
value += "0,";
break;
case XSSFCell.CELL_TYPE_FORMULA: // 公式
break;
case XSSFCell.CELL_TYPE_NUMERIC: // 数字
//先看是否是日期格式
if(HSSFDateUtil.isCellDateFormatted(cell)){
//读取日期格式
// 如果是Date类型则，取得该Cell的Date值
HSSFCellStyle cellStyle = workbook.createCellStyle();
cellStyle.setDataFormat(HSSFDataFormat.getBuiltinFormat("yyyy-MM-dd"));
cell.setCellStyle(cellStyle);
// 把Date转换成本地格式的字符串
SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd");
String d = sf.format(cell.getDateCellValue());
value += d+",";
}else{
value += cell.getNumericCellValue() + ",";
}
break;
case XSSFCell.CELL_TYPE_STRING: // 字符串
value += cell.getStringCellValue() + ",";
break;
case XSSFCell.CELL_TYPE_BOOLEAN: // Boolean
value += cell.getBooleanCellValue() + ",";
break;
case XSSFCell.CELL_TYPE_ERROR: // 故障
break;
default:
value += "0";
break;
}
}else {
value += "0,";
}
}
//将数据插入到数据库中
if(i>=1 && !"".equals(value)) {
String[] val = value.split(",");
OtherCurrentAsset existingStock=new OtherCurrentAsset();
existingStock.setAccountime(accountingTimeId);
existingStock.setName(val[0]);
if(val.length>1&&val[1]!=null&&!"".equals(val[1])&&!"null".equals(val[1])){
existingStock.setEndTime(val[1]);
}
if(val.length>2&&val[2]!=null&&!"".equals(val[2])&&!"null".equals(val[2])){
existingStock.setAccount(new BigDecimal(val[2]));
}
if(val.length>3&&val[3]!=null&&!"".equals(val[3])&&!"null".equals(val[3])){
existingStock.setPercent(new BigDecimal(val[3]));
}
existingStock.setValid(true);
otherCurrentAssetFacade.editOtherCurrentAsset(existingStock);
}
}
}
jsonStr= "{success:true}";
} catch (FileNotFoundException e) {
e.printStackTrace();
jsonStr= "{success:false}";
} catch (IOException e) {
e.printStackTrace();
jsonStr= "{success:false}";
}
renderJson(jsonStr);
return NONE;

}