使用POI导出数据库大量数据，使用的主要jar包：poi-3.8-20120326.jar、poi-ooxml-3.8-20120326.jar
样例代码：
import java.io.FileOutputStream;
import java.util.List;
import java.util.Map;
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.streaming.SXSSFWorkbook;
public class LotExport {
public static void main(String[] args) {
try {
exportLot();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
*
* 大批量导出
* @throws Exception
*/
public static void exportLot() throws Exception {
String sql = "SELECT COUNT(*) FROM T_QR_B";
int count = DBUtil.count(sql);
int limit = 60000;
int pageNumber = (count%limit==0) ? (count/limit) : (count/limit+1);
// 创建Excel的工作书册 Workbook,对应到一个excel文档
Workbook wb = new SXSSFWorkbook(1000); // keep 100 rows in memory, exceeding rows will be flushed to disk
for(int p=0; p<pageNumber; p++) {//分页查询导出数据
sql = "SELECT TOP " + limit + " * FROM (SELECT * FROM T_QR_B) T1"
+" WHERE ROW_ID NOT IN (SELECT TOP " + p*limit + " ROW_ID FROM (SELECT * FROM T_QR_B) T2 ORDER BY ROW_ID)"
+" ORDER BY ROW_ID";
List list = DBUtil.execQuery(sql);
// 创建Excel的工作sheet,对应到一个excel文档的tab
Sheet sheet = wb.createSheet("sheet" + p);
Row row = null;
Cell cell = null;
//设置标题
row = sheet.createRow(0);
cell = row.createCell(0);
cell.setCellValue("序号");
cell = row.createCell(1);
cell.setCellValue("QR");
cell = row.createCell(2);
cell.setCellValue("OWNER_ID");
cell = row.createCell(3);
cell.setCellValue("");
cell = row.createCell(4);
cell.setCellValue("SKU_ID");
cell = row.createCell(5);
cell.setCellValue("OWNER_PO_NO");
cell = row.createCell(6);
cell.setCellValue("QTY");
cell = row.createCell(7);
cell.setCellValue("EXTERNAL_LOT");
cell = row.createCell(8);
cell.setCellValue("WORK_NO");
cell = row.createCell(9);
cell.setCellValue("PRODUCE_DATE");
cell = row.createCell(10);
cell.setCellValue("LASER1");
cell = row.createCell(11);
cell.setCellValue("LASER2");
cell = row.createCell(12);
cell.setCellValue("CHECK_CODE");
cell = row.createCell(13);
cell.setCellValue("CARTON_NUMBER");
cell = row.createCell(14);
cell.setCellValue("PALLET_NUMBER");
cell = row.createCell(15);
cell.setCellValue("PACKING_LINE");
cell = row.createCell(16);
cell.setCellValue("IS_ACTIVE");
cell = row.createCell(17);
cell.setCellValue("INVENTORY_STATUS");
cell = row.createCell(18);
cell.setCellValue("SCAN_DATE");
cell = row.createCell(19);
cell.setCellValue("REMARK");
cell = row.createCell(20);
cell.setCellValue("CREATED_BY");
cell = row.createCell(21);
cell.setCellValue("CREATED_DATE");
cell = row.createCell(22);
cell.setCellValue("UPDATED_BY");
cell = row.createCell(23);
cell.setCellValue("UPDATED_DATE");
for(int i=0; i<list.size(); i++) {
Map map = (Map) list.get(i);
//System.out.println("p:"+p + ", i:" +i);
row = sheet.createRow(i + 1);
cell = row.createCell(0);
cell.setCellValue((null==map.get("ROW_ID")) ? "" : map.get("ROW_ID").toString());
cell = row.createCell(1);
cell.setCellValue((null==map.get("QR")) ? "" : map.get("QR").toString());
cell = row.createCell(2);
cell.setCellValue((null==map.get("OWNER_ID")) ? "" : map.get("OWNER_ID").toString());
cell = row.createCell(3);
cell.setCellValue((null==map.get("SKU_ID")) ? "" : map.get("SKU_ID").toString());
cell = row.createCell(4);
cell.setCellValue((null==map.get("BATCH_NO")) ? "" : map.get("BATCH_NO").toString());
cell = row.createCell(5);
cell.setCellValue((null==map.get("OWNER_PO_NO")) ? "" : map.get("OWNER_PO_NO").toString());
cell = row.createCell(6);
cell.setCellValue((null==map.get("QTY")) ? "" : map.get("QTY").toString());
cell = row.createCell(7);
cell.setCellValue((null==map.get("EXTERNAL_LOT")) ? "" : map.get("EXTERNAL_LOT").toString());
cell = row.createCell(8);
cell.setCellValue((null==map.get("WORK_NO")) ? "" : map.get("WORK_NO").toString());
cell = row.createCell(9);
cell.setCellValue((null==map.get("PRODUCE_DATE")) ? "" : map.get("PRODUCE_DATE").toString());
cell = row.createCell(10);
cell.setCellValue((null==map.get("LASER1")) ? "" : map.get("LASER1").toString());
cell = row.createCell(11);
cell.setCellValue((null==map.get("LASER2")) ? "" : map.get("LASER2").toString());
cell = row.createCell(12);
cell.setCellValue((null==map.get("CHECK_CODE")) ? "" : map.get("CHECK_CODE").toString());
cell = row.createCell(13);
cell.setCellValue((null==map.get("CARTON_NUMBER")) ? "" : map.get("CARTON_NUMBER").toString());
cell = row.createCell(14);
cell.setCellValue((null==map.get("PALLET_NUMBER")) ? "" : map.get("PALLET_NUMBER").toString());
cell = row.createCell(15);
cell.setCellValue((null==map.get("PACKING_LINE")) ? "" : map.get("PACKING_LINE").toString());
cell = row.createCell(16);
cell.setCellValue((null==map.get("IS_ACTIVE")) ? "" : map.get("IS_ACTIVE").toString());
cell = row.createCell(17);
cell.setCellValue((null==map.get("INVENTORY_STATUS")) ? "" : map.get("INVENTORY_STATUS").toString());
cell = row.createCell(18);
cell.setCellValue((null==map.get("SCAN_DATE")) ? "" : map.get("SCAN_DATE").toString());
cell = row.createCell(19);
cell.setCellValue((null==map.get("REMARK")) ? "" : map.get("REMARK").toString());
cell = row.createCell(20);
cell.setCellValue((null==map.get("CREATED_BY")) ? "" : map.get("CREATED_BY").toString());
cell = row.createCell(21);
cell.setCellValue((null==map.get("CREATED_DATE")) ? "" : map.get("CREATED_DATE").toString());
cell = row.createCell(22);
cell.setCellValue((null==map.get("UPDATED_BY")) ? "" : map.get("UPDATED_BY").toString());
cell = row.createCell(23);
cell.setCellValue((null==map.get("UPDATED_DATE")) ? "" : map.get("UPDATED_DATE").toString());
}
System.out.println("第" + p + "页导出成功");
}
FileOutputStream os = new FileOutputStream("D:\\report\\workbook.xlsx");
wb.write(os);
os.close();
System.out.println("导出成功");
}
}