将excel转化成流

service/view/src/main/java/com/founder/view/controller/TbStLayerDataController.java

@@ -8,6 +8,7 @@ import com.founder.commonutils.viewEntity.TbStLayerData;
 import com.founder.view.service.TbStLayerDataService;
 import com.founder.view.service.TbStLayerService;
 import io.swagger.annotations.Api;
+import org.apache.ibatis.javassist.bytecode.ByteArray;
 import org.apache.poi.ss.usermodel.Cell;
 import org.apache.poi.xssf.usermodel.XSSFRow;
 import org.apache.poi.xssf.usermodel.XSSFSheet;
@@ -20,6 +21,7 @@ import org.springframework.web.multipart.MultipartFile;
 import javax.annotation.Resource;
 import javax.servlet.ServletOutputStream;
 import javax.servlet.http.HttpServletResponse;
+import java.io.ByteArrayOutputStream;
 import java.io.InputStream;
 import java.text.DateFormat;
 import java.text.SimpleDateFormat;
@@ -56,6 +58,7 @@ public class TbStLayerDataController {
         TbStLayer tbStLayer = new TbStLayer();
         String layerId = KeyUtil.getUUIDKey("L");
         ServletOutputStream outputStream = null;
+        byte[] bytes = null;
         try {
             tbStLayer.setXxzjbh(layerId);
             tbStLayer.setName(name);
@@ -193,16 +196,27 @@ public class TbStLayerDataController {
                     rowData.createCell(3).setCellValue(timeFormat);
                 }
                 //通过输出流下载
-                response.setCharacterEncoding("UTF-8");
-                response.setContentType("application/vnd.ms-excel");
-                response.setHeader("Content-Disposition", "attachment;filename=error.xlsx");
+
+                //response.setContentType("application/vnd.ms-excel");
+                //response.setHeader("Content-Disposition", "attachment;filename=error.xlsx");
                 outputStream = response.getOutputStream();
+                System.out.println(outputStream);
                 //设置文件响应输出格式
-                //wb.write(outputStream);
-                outputStream.flush();
-                outputStream.close();
+//                wb.write(outputStream);
+//                outputStream.flush();
+                ByteArrayOutputStream os = new ByteArrayOutputStream();
+                wb.write(os);
+                response.reset();
+                response.setContentType("application/msexcel;charset=utf-8");
+                bytes = os.toByteArray();
+                outputStream.write(bytes);
+
+                /*outputStream.close();
+                wb.close();
+                //return null;*/
+
             }
-            return MapRestResult.build(200,"数据上传成功！",outputStream);
+            return MapRestResult.build(200,"数据上传成功！",bytes);
         } catch (Exception e) {
             e.printStackTrace();
             //如果保存数据、poi生成excel失败了就将之前的数据删除....