.

src/main/java/net/tccn/base/ExcelKit.java

@@ -4,6 +4,7 @@ import org.apache.poi.hssf.usermodel.HSSFWorkbook;
 import org.apache.poi.poifs.filesystem.OfficeXmlFileException;
 import org.apache.poi.ss.formula.functions.T;
 import org.apache.poi.ss.usermodel.*;
+import org.apache.poi.xssf.streaming.SXSSFWorkbook;
 import org.apache.poi.xssf.usermodel.XSSFWorkbook;
 
 import java.io.File;
@@ -45,7 +46,7 @@ public class ExcelKit {
     //map:data,sheetName,hds,hdNames,
     public static <T> Workbook exportExcels(List<Map<String, Object>> list) throws Exception {
 
-        Workbook wb = new XSSFWorkbook();
+        Workbook wb = new SXSSFWorkbook();
         for (int i = 0; i < list.size(); i++) {
             Map<String, Object> map = list.get(i);
             Sheet sheet = wb.createSheet();
@@ -59,8 +60,6 @@ public class ExcelKit {
                 nCell.setCellValue(hdNames[j]);
             }
 
-            //写入每一行数据---一条记录就是一行数据
-            @SuppressWarnings("unchecked")
             List<T> data = (List<T>) map.get("data");
             String[] hds = (String[]) map.get("hds");
             dataToSheet(sheet, data, hds, 1);
@@ -107,7 +106,7 @@ public class ExcelKit {
      */
     public static <T> Workbook exportExcel(List<T> list, String[] hdNames, String[] hds) throws Exception {
 
-        Workbook wb = new XSSFWorkbook();
+        Workbook wb = new SXSSFWorkbook();
         Sheet sheet = wb.createSheet();
         //写入表头---Excel的第一行数据
         Row nRow = sheet.createRow(0);
@@ -382,7 +381,7 @@ public class ExcelKit {
         try {
             wk = new HSSFWorkbook(fis);//if excel version 2007+ will throws OfficeXmlFileException
         } catch (OfficeXmlFileException e) {
-            wk = new XSSFWorkbook(fis);
+            wk = new SXSSFWorkbook(new XSSFWorkbook(fis));
         } finally {
             if (fis != null) {
                 try {

src/main/java/net/tccn/dbq/DbExecutors.java

@@ -32,6 +32,9 @@ public class DbExecutors {
         CompletableFuture<Integer> countFuture = CompletableFuture.supplyAsync(() -> dbKit.queryColumn(sqls[0], int.class));
         CompletableFuture<List<Map>> listFuture = CompletableFuture.supplyAsync(() -> dbKit.findList(sqls[1], Map.class));
 
-        return PageBean.by(listFuture.get(), countFuture.get());
+        List<Map> rows = listFuture.get();
+        Integer total = countFuture.get();
+
+        return PageBean.by(rows, total);
     }
 }