测站点问题修复

blade-service/blade-business/src/main/java/org/springblade/business/controller/DatumPointController.java

@@ -1,5 +1,6 @@
 package org.springblade.business.controller;
 
+import com.alibaba.fastjson.JSON;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.baomidou.mybatisplus.core.toolkit.Wrappers;
@@ -24,6 +25,7 @@ import javax.servlet.http.HttpServletResponse;
 import javax.servlet.http.HttpSession;
 import java.io.IOException;
 import java.io.OutputStream;
+import java.io.PrintWriter;
 import java.net.URLEncoder;
 import java.text.SimpleDateFormat;
 import java.util.*;
@@ -181,6 +183,12 @@ public class DatumPointController {
             response.setHeader("Content-Disposition", "attachment; filename=" + URLEncoder.encode(fileName, "UTF-8"));
             wb.write(output);
             output.close();
+        }else {
+            response.setContentType("application/json;charset=UTF-8");
+            PrintWriter out = response.getWriter();
+            out.println(JSON.toJSONString(R.fail("没有查到到相关数据")));
+            out.flush();
+            out.close();
         }
 
     }