修复了Task的查询问题，修改了导入员工的接口参数

src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/controller/StaffController.java

@@ -50,7 +50,7 @@ public class StaffController {
     @PostMapping(value = "/import")
     public ResponseMap importStaffs(
             @RequestHeader("Token") String token,
-            @RequestParam("File-Digest") String digest,
+            @RequestHeader("File-Digest") String digest,
             @RequestParam("uploadFile") MultipartFile uploadFile
     ) {
         if (null == uploadFile) {

src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/entity/Task.java

@@ -7,8 +7,10 @@ import com.baomidou.mybatisplus.annotation.TableId;
 import com.baomidou.mybatisplus.annotation.TableLogic;
 import com.baomidou.mybatisplus.extension.handlers.JacksonTypeHandler;
 import io.swagger.v3.oas.annotations.media.Schema;
+import lombok.AllArgsConstructor;
 import lombok.Builder;
 import lombok.Data;
+import lombok.NoArgsConstructor;
 
 import java.time.LocalDateTime;
 import java.util.Map;
@@ -19,6 +21,8 @@ import java.util.Objects;
  * @since 2022/7/4 11:07
  */
 @Builder
+@AllArgsConstructor
+@NoArgsConstructor
 @Data
 public class Task {