实战查询数据生成excel报表文件

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//导出excel文件
IExcelAPI excelService = new ExcelAPIImpl();
filePath = excelService.genExcelFile(chargeStatDTO.getBetsDataList(),SltDataConstants.SLT_CHARGE_EXCEL_COLUMNS);

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public String genExcelFile(List chargeDataList,int columns) throws BizException{
if(chargeDataList == null || chargeDataList.isEmpty()){
throw new BizException("## 生成excel文件异常: 无符合条件的记录");
}
// 初始化EXCEL文件表格
String[][] content = null; // 保存查询出的结果，以便生成EXCEL文件
String fileName = null; // 文件名
SltUserCharge sltUserCharge = null;
int rows = chargeDataList.size() + 1;
logger.info("** 记录数: " + rows);
content = new String[rows][columns];
content[0][0] = "用户ID";
content[0][1] = "所属渠道";
content[0][2] = "所属中心";
content[0][3] = "累计充值金额";
int i = 1;
for(Iterator it = chargeDataList.iterator();it.hasNext();) {
sltUserCharge = (SltUserCharge) it.next();
content[i][0] = String.valueOf(sltUserCharge.getUserid().longValue());
content[i][1] = sltUserCharge.getChannelName();
content[i][2] = sltUserCharge.getCenterName();
content[i][3] = String.valueOf(sltUserCharge.getTotalChargeMoney().doubleValue());
i++;
}
// excel文件存放地址
fileName = SltDataConstants.EXCEL_FILE_ADDR;
// 生成EXCEL文件
String now = sdf.format(new Date());
//String time = now.substring(0, 8);
String filePath = null;
if (content != null && fileName != null) {
ExcelProcessor excel = ExcelProcessor.getInstance();
if (content.length <= EXCEL_MAX_ROW) {
filePath = fileName + now + ".xls";
logger.info("EXCEL文件路径：" + filePath);
if(!excel.write2Excel(filePath, content)) {
logger.error("生成EXCEL文件失败(" + sdf.format(now) + ")：" + filePath);
}
}else {
int size = content.length;
int archives = size / EXCEL_MAX_ROW;
int start = 1;
int end = 1;
for (int j = 0; j <= archives; j++) {
int num = j + 1;
filePath = fileName + now + "_" + num + ".xls";
logger.info("EXCEL文件路径：" + filePath);
start = end;
end = start + (EXCEL_MAX_ROW - 1);
if (end >= size) {
end = size;
}
if (!excel.write2Excel(filePath, content, start, end)) {
logger.error("生成EXCEL文件失败(" + sdf.format(now) + ")：" + filePath);
}
}
}
}
logger.info("** [成功生成excel!]");
String fileRS = filePath.replaceAll(SltDataConstants.FILE_DIR_ADDR, "");
logger.info("** filePath = " + fileRS);
return fileRS;
}