diff --git a/PythonProject/api/cla_api.py b/PythonProject/api/cla_api.py
index b002d34..a57ae60 100644
--- a/PythonProject/api/cla_api.py
+++ b/PythonProject/api/cla_api.py
@@ -5,27 +5,27 @@ from dao.cla_dao import add_class_dao,get_class_dao,update_class_dao,delete_clas
 
 claAPI = APIRouter(prefix="/class", tags=["班级管理"])
 
-@claAPI.post("/class", summary="新增班级")
+@claAPI.post("", summary="新增班级")
 def add_class(data: claRequest, Session = Depends(get_db)):
     return add_class_dao(data, Session)
 
-@claAPI.get("/class/list", summary="查询班级")
-def list_class(Session = Depends(get_db)):
-    return get_class_dao(Session)
+@claAPI.get("/list", summary="查询班级")
+def list_class(n:int,m:int,Session = Depends(get_db)):
+    return get_class_dao(n,m,Session)
 
-@claAPI.put("/class/{class_id}", summary="更新班级信息")
+@claAPI.put("/{class_id}", summary="更新班级信息")
 def update_class(class_id: int, data: claRequest, Session = Depends(get_db)):
     return update_class_dao(class_id, data, Session)
 
-@claAPI.get("/class/{class_id}", summary="逻辑删除班级信息")
+@claAPI.delete("/{class_id}", summary="逻辑删除班级信息")
 def delete_class(class_id: int, Session = Depends(get_db)):
     return delete_class_dao(class_id, Session)
 
-@claAPI.get("/class/delete/check/{class_id}", summary="硬删除前查询")
+@claAPI.get("/delete/check/{class_id}", summary="硬删除前查询")
 def check_delete(class_id: int, Session = Depends(get_db)):
     return get_class_for_delete(class_id, Session)
 
-@claAPI.delete("/class/delete/confirm/{class_id}", summary="删除班级信息")
+@claAPI.delete("/delete/confirm/{class_id}", summary="删除班级信息")
 def confirm_delete(class_id: int, Session = Depends(get_db)):
     return hard_delete_class(class_id, Session)
 
diff --git a/PythonProject/api/employment_api.py b/PythonProject/api/employment_api.py
index 22095c7..58a14d3 100644
--- a/PythonProject/api/employment_api.py
+++ b/PythonProject/api/employment_api.py
@@ -2,28 +2,24 @@ from fastapi import APIRouter,Depends,HTTPException
 
 from dao import employment_dao
 from dao.employment_dao import get_employment_dao
-from schema.employment_schema import EmploymentRequest,EmploymentResponse
+from schema.employment_schema import EmploymentResponse
 from model.all_model import ClassManagement,Employment_info
 from util.database import get_db
-
-emp_api = APIRouter()
-@emp_api.get('employment/students/{stu_id}',response_model=EmploymentResponse,summary='获取学生就业信息')
+emp_api = APIRouter(tags=['学生就业管理系统'])
+@emp_api.get('/employment/students/{stu_id}',response_model=EmploymentResponse,summary='获取学生就业信息')
 def get_emp_info1(stu_id: int,db=Depends(get_db)):
-    try:
-        if stu_id:
-            return employment_dao.get_employment_info()
-    except:
-        raise HTTPException(status_code=404, detail='该学生就业信息不存在')
+    if stu_id:
+        return employment_dao.get_employment_dao(stu_id=stu_id,db=db)
+    raise HTTPException(status_code=404, detail='该学生就业信息不存在')
 
-@emp_api.get('employment/class/{class_id}',summary='获取班级学生就业信息')
+@emp_api.get('/employment/class/{class_id}',response_model=EmploymentResponse,summary='获取班级学生就业信息')
 def get_emp_info2(class_id: int,db=Depends(get_db)):
-    try:
-        if class_id:
-            return employment_dao.get_employment_info()
-    except:
-        raise HTTPException(status_code=404, detail='该班级就业信息不存在')
+    if class_id:
+        return employment_dao.get_employment_dao(class_id=class_id,db=db)
+    raise HTTPException(status_code=404, detail='该班级就业信息不存在')
 
-# @emp_api.post('employment/students/{stu_id}')
-# def create_emp_info(stu_id: int,db=Depends(get_db)):
-#     try:
-#     pass
+# @emp_api.post('/employment/students/{stu_id}')
+# def create_emp_info(stu_id: int,db=Depends(get_db),response_model=EmploymentResponse):
+#     if stu_id:
+#
+#         return employment_dao.
diff --git a/PythonProject/api/statistics_api.py b/PythonProject/api/statistics_api.py
index f934c21..f9538fd 100644
--- a/PythonProject/api/statistics_api.py
+++ b/PythonProject/api/statistics_api.py
@@ -1,7 +1,7 @@
 from fastapi import APIRouter,Depends
-from dao.statistics_dao import select_all,select_age,select_score,select_avg_score,select_salary,select_days
+from dao.statistics_dao import *
 from schema.student_schema import StudentResponse
-from schema.statistics_schema import AllStuResponse,AvgDayResponse,AcgScoreResponse
+from schema.statistics_schema import *
 from util.database import get_db
 
 StatisticsAPI = APIRouter()
@@ -35,3 +35,9 @@ def get_scores(db=Depends(get_db)):
 def get_days(db=Depends(get_db)):
     l = select_days(db)
     return l
+
+
+@StatisticsAPI.get('/emp',response_model=AllEmpResponse,tags=['统计分析模块'],summary='统计每个学生的就业时长')
+def get_emp(db=Depends(get_db)):
+    l= select_days2(db)
+    return l
\ No newline at end of file
diff --git a/PythonProject/api/student_api.py b/PythonProject/api/student_api.py
index 7ff2fe1..3341a3a 100644
--- a/PythonProject/api/student_api.py
+++ b/PythonProject/api/student_api.py
@@ -6,7 +6,7 @@ from util.database import get_db
 
 StudentAPI = APIRouter()
 
-@StudentAPI.get('/students',response_model=list[StudentPageResponse],tags=['学⽣基本信息管理模块'],description='查询学生信息')
+@StudentAPI.get('/students',response_model=list[StudentPageResponse],tags=['学⽣基本信息管理模块'],summary='学生信息查询接口',description='查询学生信息')
 def get_students(stu_id:int|None=None
                 ,stu_name:str|None=None
                 ,class_id:int|None=None
@@ -29,7 +29,7 @@ def get_students(stu_id:int|None=None
         , 'total': total
         , 'data': r}
 
-@StudentAPI.put('/{stu_id}',tags=['学⽣基本信息管理模块'])
+@StudentAPI.put('/{stu_id}',tags=['学⽣基本信息管理模块'],summary='学生信息更新接口',description='更新学生信息')
 def update_students(s:StudentRequest
                     ,stu_id:int
                     ,db=Depends(get_db)):
@@ -41,7 +41,7 @@ def update_students(s:StudentRequest
         raise HTTPException(status_code=500, detail='没有更新！')
     return {'code':200,'totals':r,'detail':'更新成功'}
 
-@StudentAPI.delete('/{stu_id}',tags=['学⽣基本信息管理模块'])
+@StudentAPI.delete('/{stu_id}',tags=['学⽣基本信息管理模块'],summary='学生信息删除接口',description='删除学生信息')
 def del_students(stu_id:int
                  ,db=Depends(get_db)):
     rows=delete_student_dao( stu_id=stu_id,db=db )
@@ -49,7 +49,7 @@ def del_students(stu_id:int
         raise HTTPException(status_code=500,detail='没有删除')
     return {'code':200,'totals':rows,'detail':'删除成功'}
 
-@StudentAPI.post('/students',tags=['学⽣基本信息管理模块'],response_model=StugetResponse)
+@StudentAPI.post('/students',tags=['学⽣基本信息管理模块'],response_model=StugetResponse,summary='学生信息新增接口',description='新增学生信息')
 def add_students(s:StudentRequest
                  ,db=Depends(get_db)):
     d=s.model_dump(exclude_unset=False)
@@ -57,16 +57,3 @@ def add_students(s:StudentRequest
     if not stu_new:
         raise HTTPException(status_code=500,detail='添加失败')
     return stu_new
-
-
-@StudentAPI.put('/students',tags=['学⽣基本信息管理模块'])
-def get_students(stu_id:int|None = None
-                 ,stu_name:str|None = None
-                 ,class_id:int|None=None
-                 ,db=Depends(get_db)
-                 ,page:int=1
-                 ,page_size:int=10):
-    r = get_student_dao(stu_id,stu_name,class_id,db,page,page_size )
-    if r:
-        return r
-    raise HTTPException(status_code=404,detail='学生不存在！')
diff --git a/PythonProject/api/teacher_api.py b/PythonProject/api/teacher_api.py
index c0ba4fb..dd6e738 100644
--- a/PythonProject/api/teacher_api.py
+++ b/PythonProject/api/teacher_api.py
@@ -2,18 +2,21 @@ from fastapi import APIRouter,HTTPException,Depends
 from schema.teacher_schema import Teacher_ResponseModel, Teacher_RequestModel
 from dao.teacher_dao import add_teacher
 from util.database import get_db
+from dao.teacher_dao import update_teacher
+from dao.teacher_dao import delete_teacher
+from dao.teacher_dao import get_teacher
 
 teacher_api=APIRouter()
 
 @teacher_api.post("/teachers",response_model=Teacher_ResponseModel,tags=['教师基本信息管理模块'],summary='新增教师接口')
-def get_teacher(x1:Teacher_RequestModel,session=Depends(get_db)):
+def add_teacher1(x1:Teacher_RequestModel,session=Depends(get_db)):
     y=add_teacher(x1.model_dump(),session)
     if not y:
         raise HTTPException(status_code=500,detail='添加异常！')
     return x1
 
 @teacher_api.get("/teachers",tags=['教师基本信息管理模块'],summary='查询教师接口')
-def get_teacher(teacid:int, session=Depends(get_db)):
+def get_teacher1(teacid:int, session=Depends(get_db)):
     # r = get_teacher(id=id,session=session)
     # if not r:
     #     raise HTTPException(status_code=500, detail='查询异常！')
@@ -24,18 +27,18 @@ def get_teacher(teacid:int, session=Depends(get_db)):
         raise HTTPException(status_code=500,detail='数据库查询异常!')
 
 
-@teacher_api.put("/teachers",response_model=Teacher_ResponseModel,tags=['教师基本信息管理模块'],summary='更新教师接口')
-def update_teacher(id:int,teacher:Teacher_RequestModel,session=Depends(get_db)):
-    d=teacher.model_dump()
-    r=update_teacher(id=id,req=d,session=session)
+@teacher_api.put("/teachers/{t_id}",tags=['教师基本信息管理模块'],summary='更新教师接口')
+def update_teacher1(t_id:int,teacher:Teacher_RequestModel,session=Depends(get_db)):
+    d=teacher.model_dump(exclude_unset=True)
+    r=update_teacher(id=t_id,req=d,session=session)
     if not r:
         raise HTTPException(status_code=500, detail='更新异常！')
-    return {'code': 200, 'totals': r, 'detail': '更新成功'}
+    return {'code':200,'detail':'cg'}
 
 
-@teacher_api.delete("/teachers",response_model=Teacher_ResponseModel,tags=['教师基本信息管理模块'],summary='删除教师接口')
-def delete_teacher(id:int,session=Depends(get_db)):
-    r=delete_teacher(id=id,session=session)
+@teacher_api.delete("/teachers/{t_id}",tags=['教师基本信息管理模块'],summary='删除教师接口')
+def delete_teacher1(t_id:int,session=Depends(get_db)):
+    r=delete_teacher(id=t_id,session=session)
     if not r:
         raise HTTPException(status_code=500,detail='删除异常！')
-    return {'code': 200, 'totals': r}
\ No newline at end of file
+    return {'code': 200, 'detail': 'cg'}
\ No newline at end of file
diff --git a/PythonProject/dao/cla_dao.py b/PythonProject/dao/cla_dao.py
index 3aa0bbe..cd53254 100644
--- a/PythonProject/dao/cla_dao.py
+++ b/PythonProject/dao/cla_dao.py
@@ -15,9 +15,9 @@ def add_class_dao(c:claRequest,session):
         session.commit()
         return '添加成功！'
 
-def get_class_dao(session):
+def get_class_dao(n,m,session):
     try:
-        class_list=session.query(ClassManagement).filter(ClassManagement.delete_status==0).all()
+        class_list=session.query(ClassManagement).filter(ClassManagement.delete_status==0).offset((n-1)*m).limit(m).all()
         return class_list
     except:
         raise HTTPException(status_code=406,detail="输入查询信息有误，请重新输入！")
@@ -60,7 +60,6 @@ def get_class_for_delete(id: int, session):
         "class_teacher_id": obj.class_teacher_id,
     }
 
-
 def hard_delete_class(id: int, session):
     try:
         obj = (
diff --git a/PythonProject/dao/employment_dao.py b/PythonProject/dao/employment_dao.py
index 426452b..e7a27c0 100644
--- a/PythonProject/dao/employment_dao.py
+++ b/PythonProject/dao/employment_dao.py
@@ -1,9 +1,9 @@
-from fastapi import HTTPException,Depends
+from fastapi import HTTPException
 from model.all_model import Employment_info, ClassManagement, Student_Model
 from util.database import get_db
 from schema.employment_schema import EmploymentRequest
 
-def get_employment_dao(stu_id,class_id,db=Depends(get_db())):
+def get_employment_dao(stu_id,class_id,db):
     try:
         q = db.query(Employment_info).\
             join(Student_Model,Employment_info.stu_id == Student_Model.stu_id).\
@@ -27,20 +27,19 @@ def get_employment_dao(stu_id,class_id,db=Depends(get_db())):
                     ,'company_name':i.company_name
                     ,'company_address':i.company_address
                     ,'salary':i.salary
-                    }for i in r
+                     }for i in r
                     ]
     except:
         raise HTTPException(status_code=404,detail='信息不存在！')
 
-# def add_employment_dao(e:EmlpoymentRequest,db=Depends(get_db()),stu_id):
-#     try:
-#         r = db.query(Employment_info).filter(Employment_info.stu_id == stu_id).all()
-#         if r:
-#         e1 = Employment_info(**e)
-#         db.add(e1)
-#     except:
-#         db.rollback()
-#         return False
-#     else:
-#         db.commit()
-#         return True
+def add_employment_dao(e:EmploymentRequest,db):
+    try:
+        d = e.model_dump()
+        e1 = Employment_info(**d)
+        db.add(e1)
+    except:
+        db.rollback()
+        raise HTTPException(status_code=404, detail='信息不存在！')
+    else:
+        db.commit()
+        return e1
diff --git a/PythonProject/dao/statistics_dao.py b/PythonProject/dao/statistics_dao.py
index 52658c8..726c60d 100644
--- a/PythonProject/dao/statistics_dao.py
+++ b/PythonProject/dao/statistics_dao.py
@@ -91,3 +91,21 @@ def select_days(db):
     except Exception:
         raise HTTPException(status_code=500, detail="查询异常")
 
+#统计每个学⽣的就业时⻓
+def select_days2(db):
+    try:
+        l2 =db.query(
+                     Employment_info.stu_id
+                    ,Employment_info.employment_opening_date
+                    ,Employment_info.offer_issuance_date
+                       ,func.datediff(
+                                      Employment_info.offer_issuance_date
+                                     ,Employment_info.employment_opening_date
+                                     )
+                      .label("employment_duration_day")
+                    ).filter(
+                             Employment_info.delete_status == 0
+                             ).all()
+        return l2
+    except Exception:
+        raise HTTPException(status_code=500, detail="查询异常")
\ No newline at end of file
diff --git a/PythonProject/dao/teacher_dao.py b/PythonProject/dao/teacher_dao.py
index cfb3eed..551b33a 100644
--- a/PythonProject/dao/teacher_dao.py
+++ b/PythonProject/dao/teacher_dao.py
@@ -6,11 +6,8 @@ def add_teacher(teacher,session):
     try:
         print(teacher)
         x=Teacher_Model(**teacher)
-        print(1)
         session.add(x)
-        print(2)
         session.commit()
-        print(3)
         return teacher
     except:
         session.rollback()
@@ -25,19 +22,24 @@ def get_teacher(id,session):
     else:
         raise HTTPException(status_code=404,detail='该老师不存在！')
 
-def update_teacher(teac_id:int,req:Teacher_RequestModel,session):
+def update_teacher(id:int,req,session):
     try:
-        session.query(Teacher_Model).filter(Teacher_Model.teac_id==id)\
-        .filter(Teacher_Model.delete_status==0).update(req.model_dump(exclude_unset=True))
-        session.commit()
+        r=session.query(Teacher_Model).filter(Teacher_Model.teac_id==id) \
+            .filter(Teacher_Model.delete_status==0).update(req)
     except:
-        raise HTTPException(status_code=500,detail="更新异常！")
+        session.rollback()
+        return False
+    else:
+        session.commit()
+        return r
 
 def delete_teacher(id:int,session):
     try:
-        session.query(Teacher_Model).filter(Teacher_Model.teac_id==id,Teacher_Model.delete_status==0)\
+        r=session.query(Teacher_Model).filter(Teacher_Model.teac_id==id,Teacher_Model.delete_status==0)\
             .update({'delete_status':1})
-        session.commit()
     except:
-        raise HTTPException(status_code=500,detail="删除异常")
-    return {'code':200,'details':'删除成功'}
+        session.rollback()
+        return False
+    else:
+        session.commit()
+        return r
diff --git a/PythonProject/schema/employment_schema.py b/PythonProject/schema/employment_schema.py
index 4e93d2c..28a6078 100644
--- a/PythonProject/schema/employment_schema.py
+++ b/PythonProject/schema/employment_schema.py
@@ -1,10 +1,10 @@
-from fastapi import Query,HTTPException
-from pydantic import BaseModel, field_validator
+from fastapi import HTTPException
+from pydantic import BaseModel, Field,field_validator, model_validator
 from datetime import date
 from typing import Optional
 
 class EmploymentRequest(BaseModel):
-    stu_id: int=Query(ge=1)
+    stu_id: int=Field(ge=1)
     email: str|None
     employment_opening_date:date
     offer_issuance_date:date
@@ -13,11 +13,17 @@ class EmploymentRequest(BaseModel):
     salary:float
 
     @field_validator('stu_id')
-    def check(cls,n):
-        i = cls.model_dump()
-        if i['stu_id'] == n:
-            return n
-        raise HTTPException(status_code=404,detail='未找到该学生的就业信息！')
+    @classmethod
+    def check_stu_id(cls,v):
+        if v <= 0:
+            raise ValueError('输入有误，学生ID必须大于0')
+        return v
+
+    @model_validator(mode='after')
+    def check_date(self):
+        if self.employment_opening_date > self.offer_issuance_date:
+            raise ValueError('offer下发日期不能早于就业开放日期')
+        return self
 
 class EmploymentResponse(BaseModel):
     code:int = 200
diff --git a/PythonProject/schema/statistics_schema.py b/PythonProject/schema/statistics_schema.py
index ab8e87b..2b76ae4 100644
--- a/PythonProject/schema/statistics_schema.py
+++ b/PythonProject/schema/statistics_schema.py
@@ -1,4 +1,6 @@
-from pydantic import BaseModel
+from pydantic import BaseModel,Field
+from datetime import date
+from typing import List, Optional
 
 class AllStuResponse(BaseModel):
     class_id: int
@@ -13,3 +15,17 @@ class AvgDayResponse(BaseModel):
     class_id: int
     avg_days: str | None
 
+class EmpRequest(BaseModel):
+    stu_id: int
+
+class EmpItem(BaseModel):
+    stu_id: int
+    employment_opening_date:date | None
+    offer_issuance_date:date | None
+    employment_duration_day: int | None
+
+class AllEmpResponse(BaseModel):
+    code: int
+    msg: str
+    data: List[EmpItem]
+
diff --git a/PythonProject/util/database.py b/PythonProject/util/database.py
index 7c72545..cb96327 100644
--- a/PythonProject/util/database.py
+++ b/PythonProject/util/database.py
@@ -1,7 +1,7 @@
 from sqlalchemy import create_engine
 from sqlalchemy.orm import declarative_base,sessionmaker
 
-db_url = 'mysql+pymysql://root:123456@127.0.0.1:3306/ai0824?charset=utf8mb4'
+db_url = 'mysql+pymysql://root:123456@192.168.5.12:3306/ai0824?charset=utf8mb4'
 engine = create_engine(db_url,pool_size=50)
 Base = declarative_base()