public CopyOfExportTask(
String connectUrls,
String queryProcedure,
Map<String, String> params,
String resultProcedure,
HttpServletRequest request) {
this.connectUrls = connectUrls;
this.params = new HashMap<String, String>();
Object[] keys = params.keySet().toArray();
this.keys = new String[keys.length];
for (int i = 0; i < keys.length; i++) { // 把map里所有key转成小写，与执行的存储过程保持一致
String key = keys[i].toString();
this.keys[i] = key.toLowerCase();
this.params.put(key.toLowerCase(), MapUtils.getString(params, key, ""));
}
this.queryProcedure = handleSql(queryProcedure.toLowerCase(), this.params);
this.resultProcedure = resultProcedure.toLowerCase();
this.fileName =
MapUtils.getString(params, "modulename", "导出文件")
+ "_"
+ new SimpleDateFormat(Constant.TIMESTAMP_FORMAT_yyyyMMddHHmmssSSS).format(new Date())
+ Constant.EXCEL;
this.ip = request.getServerName();
this.port = request.getServerPort();
this.filePath =
request.getRealPath(Constant.EXPORT_PATH_FOLDER) + File.separatorChar + this.fileName;
this.jt = DBUtil.getReadJdbcTemplate(this.connectUrls);
}
private void updateExportResult() {
JdbcTemplate writeJt = DBUtil.getWriteJdbcTemplate(connectUrls);
writeResult(
writeJt,
resultProcedure,
this.params,
"http://" + this.ip + ":" + this.port + "/export/download/" + fileName,
"");
}
@Override
public void run() {
try {
int total = getCount(jt, queryProcedure); // 总记录数
if (total == 0) {
throw new Exception("没有能导出的数据！");
}
double totalPages = getPages(total);
SXSSFWorkbook wb = null;
FileInputStream fis = null;
for (int i = 0; i < totalPages; i++) { // 总共要查询数据库的次数
List<Map<String, Object>> list = query(jt, queryProcedure, pageCount, i + 1); // 查询分页数据
if (list != null && list.size() != 0) {
if (this.titles == null) { // 设置标题数组，方便以后使用
handleTitles(list); // 处理标题数组
}
File file = new File(filePath);
if (!file.exists()) {
wb = createWorkbook(); // 生成excel对象
}
POIUtil.exportPerpareShit(list, wb, this.titles); // 将本分页数据写入excel对象
}
}
writeToFile(wb); // 将excel对象写入硬盘的excel文件
updateExportResult(); // 更新导出结果
} catch (Exception e) {
JdbcTemplate writeJt = DBUtil.getWriteJdbcTemplate(connectUrls);
writeResult(writeJt, resultProcedure, this.params, "", e.getMessage());
}
}