diff --git a/web/src/main/java/com/ibeetl/jlw/entity/Student.java b/web/src/main/java/com/ibeetl/jlw/entity/Student.java
index 9b84502c..e53c90d6 100644
--- a/web/src/main/java/com/ibeetl/jlw/entity/Student.java
+++ b/web/src/main/java/com/ibeetl/jlw/entity/Student.java
@@ -16,6 +16,8 @@ import javax.validation.constraints.NotBlank;
 import javax.validation.constraints.NotNull;
 import java.util.Date;
 
+import static cn.hutool.core.util.ObjectUtil.defaultIfNull;
+
 /* 
 * 学生管理
 * gen by Spring Boot2 Admin 2021-06-19
@@ -269,7 +271,7 @@ public class Student extends BaseEntity implements AbstractToken {
 
     @Override
     public String getId() {
-        return this.getUserId().toString();
+        return defaultIfNull(getUserId(), "").toString();
     }
 
     @Override
diff --git a/web/src/main/java/com/ibeetl/jlw/entity/Teacher.java b/web/src/main/java/com/ibeetl/jlw/entity/Teacher.java
index 1c979566..c70440cd 100644
--- a/web/src/main/java/com/ibeetl/jlw/entity/Teacher.java
+++ b/web/src/main/java/com/ibeetl/jlw/entity/Teacher.java
@@ -11,6 +11,8 @@ import javax.validation.constraints.NotBlank;
 import javax.validation.constraints.NotNull;
 import java.util.Date;
 
+import static cn.hutool.core.util.ObjectUtil.defaultIfNull;
+
 /* 
 * 教师管理
 * gen by Spring Boot2 Admin 2021-06-19
@@ -252,7 +254,7 @@ public class Teacher extends BaseEntity implements AbstractToken {
 
     @Override
     public String getId() {
-        return getUserId().toString();
+        return defaultIfNull(getUserId(), "").toString();
     }
 
     @Override