更改了时间验证的类型为public

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

@@ -47,7 +47,7 @@ public class Project {
     private LocalDateTime projectCreatedTime;
     private LocalDate projectClosedDate;
 
-    Boolean checkProjectDate() {
+    public Boolean checkProjectDate() {
         if(!TimeUtils.validateTimeLine(projectStartDate, projectFirstTestDate, projectFinalTestDate, projectEndDate)) {
             return false;
         }