解决商品导出excel失败的bug

src/main/java/com/jsh/erp/controller/MaterialController.java

@@ -198,15 +198,13 @@ public class MaterialController {
      * @return
      */
     @GetMapping(value = "/exportExcel")
-    public BaseResponseInfo exportExcel(@RequestParam("name") String name,
+    public void exportExcel(@RequestParam("name") String name,
                                         @RequestParam("model") String model,
                                         @RequestParam("categoryIds") String categoryIds,
-                                        HttpServletRequest request, HttpServletResponse response)throws Exception {
-        BaseResponseInfo res = new BaseResponseInfo();
-        Map<String, Object> map = new HashMap<String, Object>();
-        String message = "成功";
+                                        HttpServletRequest request, HttpServletResponse response) {
         try {
-            List<MaterialVo4Unit> dataList = materialService.findByAll(name, model, categoryIds);
+            List<MaterialVo4Unit> dataList = materialService.findByAll(StringUtil.toNull(name), StringUtil.toNull(model),
+                    StringUtil.toNull(categoryIds));
             String[] names = {"品名", "类型", "型号", "安全存量", "单位", "零售价", "最低售价", "预计采购价", "批发价", "备注", "状态"};
             String title = "商品信息";
             List<String[]> objects = new ArrayList<String[]>();
@@ -229,16 +227,9 @@ public class MaterialController {
             }
             File file = ExcelUtils.exportObjectsWithoutTitle(title, names, title, objects);
             ExportExecUtil.showExec(file, file.getName(), response);
-            res.code = 200;
         } catch (Exception e) {
             e.printStackTrace();
-            message = "导出失败";
-            res.code = 500;
-        } finally {
-            map.put("message", message);
-            res.data = map;
         }
-        return res;
     }
 
     /**

src/main/java/com/jsh/erp/utils/StringUtil.java

@@ -215,4 +215,16 @@ public class StringUtil {
         }
         return value;
     }
+
+    public static String toNull(String value) {
+        if(("").equals(value)) {
+            value = null;
+        }
+        return value;
+    }
+
+    public static void main(String[] args) {
+        int i = 10/3;
+        System.out.println(i);
+    }
 }