diff --git a/PythonProject/api/cla_api.py b/PythonProject/api/cla_api.py
index e7d4da1..a57ae60 100644
--- a/PythonProject/api/cla_api.py
+++ b/PythonProject/api/cla_api.py
@@ -10,8 +10,8 @@ def add_class(data: claRequest, Session = Depends(get_db)):
     return add_class_dao(data, Session)
 
 @claAPI.get("/list", summary="查询班级")
-def list_class(Session = Depends(get_db)):
-    return get_class_dao(Session)
+def list_class(n:int,m:int,Session = Depends(get_db)):
+    return get_class_dao(n,m,Session)
 
 @claAPI.put("/{class_id}", summary="更新班级信息")
 def update_class(class_id: int, data: claRequest, Session = Depends(get_db)):
diff --git a/PythonProject/api/employment_api.py b/PythonProject/api/employment_api.py
index 58a14d3..6c022bf 100644
--- a/PythonProject/api/employment_api.py
+++ b/PythonProject/api/employment_api.py
@@ -1,25 +1,53 @@
-from fastapi import APIRouter,Depends,HTTPException
+from fastapi import APIRouter,Query,Depends,HTTPException
+from util.database import get_db
 
 from dao import employment_dao
-from dao.employment_dao import get_employment_dao
-from schema.employment_schema import EmploymentResponse
-from model.all_model import ClassManagement,Employment_info
+from dao.employment_dao import get_emp_dao, add_emp_dao, check_stu_dao, update_emp_dao, delete_emp_dao
+from schema.employment_schema import EmploymentRequest,EmploymentResponse
 from util.database import get_db
+from typing import Optional
 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)):
-    if stu_id:
-        return employment_dao.get_employment_dao(stu_id=stu_id,db=db)
+def get_emp_info1(stu_id: Optional[int]=Query(None,description='学生编号')
+                  ,company_name: Optional[str]=Query(None,description='公司名称')
+                  ,min_salary: Optional[float]=Query(None,description='最低工资')
+                  ,max_salary: Optional[float]=Query(None,description='最高工资')
+                  ,db=Depends(get_db)):
+    if stu_id or company_name or min_salary or max_salary:
+        return [employment_dao.get_emp_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}',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)):
+def get_emp_info2(class_id: Optional[int],db=Depends(get_db)):
     if class_id:
-        return employment_dao.get_employment_dao(class_id=class_id,db=db)
+        return employment_dao.get_emp_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),response_model=EmploymentResponse):
-#     if stu_id:
-#
-#         return employment_dao.
+@emp_api.post('/employment/students/{stu_id}',response_model=EmploymentResponse,summary='新增学生就业信息')
+def create_emp_info(stu_id:int,emp:EmploymentRequest,db=Depends(get_db)):
+    if not check_stu_dao(stu_id,db):
+        raise HTTPException(status_code=404, detail='该学生不存在,无法添加就业信息')
+    emp.stu_id = stu_id
+    exist = db.query(employment_dao.Employment_info).filter(employment_dao.Employment_info.stu_id == stu_id,employment_dao.Employment_info.delete_status == 0).first()
+    if exist:
+        raise HTTPException(status_code=409,detail='该学生已有就业信息，请勿重复增加！')
+    d=emp.model_dump(exclude_unset=False)
+    r=add_emp_dao(d,db)
+    if not r:
+        raise HTTPException(status_code=500,detail='服务器繁忙，请稍后添加！')
+    return r
+
+@emp_api.put('/employment/students/{stu_id}',response_model=EmploymentResponse,summary='更新学生就业信息')
+def update_emp_info(stu_id:int,emp:EmploymentRequest,db=Depends(get_db)):
+    d = emp.model_dump(exclude_unset=True)
+    r = update_emp_dao(stu_id,d,db)
+    if not r:
+        raise HTTPException(status_code=500,detail='更新失败！')
+    return {'code':200,'totals':r,'detail':'更新成功！'}
+
+@emp_api.delete('/employment/{stu_id}',summary='删除学生就业信息')
+def delete_emp_info(stu_id:int,db=Depends(get_db)):
+    rows = delete_emp_dao(stu_id, db)
+    if not rows:
+        raise HTTPException(status_code=500, detail='没有删除！')
+    return {'code':200,'detail':'删除成功！'}
diff --git a/PythonProject/api/grade_api.py b/PythonProject/api/grade_api.py
index f8ab18b..be2612f 100644
--- a/PythonProject/api/grade_api.py
+++ b/PythonProject/api/grade_api.py
@@ -6,11 +6,11 @@ from schema.grade_schema import *
 
 gradeAPI = APIRouter(tags=['学生考核成绩'])
 
-@gradeAPI.get("/grade/{stu_id}",summary="根据学生id查询成绩")
+@gradeAPI.get("/grade/{stu_id}",response_model=list[GradeResponse],summary="根据学生id查询成绩")
 def get_grade(stu_id: int,db=Depends(get_db)):
     try:
         res=get_grade_dao(stu_id,db)
-        return {'code': 200,'msg':'查询成功','data':res}
+        return res
     except Exception as e:
         raise HTTPException(status_code=500,detail=f'数据库查询异常:{str(e)}')
 
@@ -23,14 +23,36 @@ def post_grade(o:GradeRequest=Form(),db=Depends(get_db)):
     return o
 
 @gradeAPI.put('/{score_id}',summary='成绩修改')
-def put_grade(score_id: int,o:GradeUpdate,db=Depends(get_db)):
-    d = o.model_update(exclude_unset=True)
-    r = update_grade_dao(score_id=score_id
-                         ,update_data=d
-                         ,db=db)
-    if not r:
-        raise HTTPException(status_code=500,detail='没有更新')
-    return {'code':200,'totals':r,'detail':'更新成功'}
+def put_grade(
+        score_id: int
+        ,o:GradeUpdate=Form()
+        ,db=Depends(get_db)
+):
+    old_obj = get_score_by_id_dao(score_id=score_id, db=db)
+    if not old_obj:
+        raise HTTPException(status_code=404, detail="成绩记录不存在(已删除)")
+
+    d = o.model_dump(exclude_unset=True)
+    if not d:
+        raise HTTPException(status_code=400,detail='请传入需要修改的字段')
+    if "exam_order" in d:
+        exist_obj = get_score_by_stu_exam_order_dao(
+            stu_id=old_obj.stu_id,
+            exam_order=d["exam_order"],
+            db=db
+        )
+        if exist_obj and exist_obj.id != score_id:
+            raise HTTPException(status_code=409, detail="修改后的考核序次，该学生已有成绩！")
+
+        try:
+            r = update_grade_dao(score_id=score_id, update_data=d, db=db)
+        except Exception:
+            raise HTTPException(status_code=409, detail="数据冲突，重复数据")
+
+        if r == 0:
+            return {"code": 200, "totals": r, "detail": "数据未发生变化"}
+
+        return {"code": 200, "totals": r, "detail": "更新成功"}
 
 @gradeAPI.delete('/{score_id}',summary='删除成绩')
 def delete_grade(score_id:int,db=Depends(get_db)):
diff --git a/PythonProject/api/student_api.py b/PythonProject/api/student_api.py
index 3341a3a..2295009 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'],summary='学生信息查询接口',description='查询学生信息')
+@StudentAPI.get('/students',response_model=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
@@ -22,12 +22,10 @@ def get_students(stu_id:int|None=None
 
     if not r:
           raise HTTPException(status_code=404,detail='学生不存在')
-    return {'code': 200
-        , 'detail': 'ok'
-        , 'page': page
-        , 'page_size': page_size
-        , 'total': total
-        , 'data': r}
+    return StudentPageResponse(page=page,
+                               page_size=page_size,
+                               total=total,
+                               data=r)
 
 @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
diff --git a/PythonProject/dao/cla_dao.py b/PythonProject/dao/cla_dao.py
index 12bc50c..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！")
diff --git a/PythonProject/dao/employment_dao.py b/PythonProject/dao/employment_dao.py
index e7a27c0..5ce81a0 100644
--- a/PythonProject/dao/employment_dao.py
+++ b/PythonProject/dao/employment_dao.py
@@ -1,9 +1,8 @@
 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):
+
+def get_emp_dao(stu_id=None,class_id=None,company_name=None,min_salary=None,max_salary=None,db=None):
     try:
         q = db.query(Employment_info).\
             join(Student_Model,Employment_info.stu_id == Student_Model.stu_id).\
@@ -11,16 +10,24 @@ def get_employment_dao(stu_id,class_id,db):
             filter(Employment_info.delete_status == 0).\
             filter(Student_Model.delete_status == 0).\
             filter(ClassManagement.delete_status == 0)
-        if stu_id is not None:
+        if stu_id:
             q = q.filter(Employment_info.stu_id == stu_id)
-        if class_id is not None:
+        if class_id:
             q = q.filter(ClassManagement.class_id == class_id)
+        if company_name:
+            q = q.filter(Employment_info.company_name == company_name)
+        if min_salary:
+            q = q.filter(Employment_info.salary >= min_salary)
+        if max_salary:
+            q = q.filter(Employment_info.salary <= max_salary)
+
         r = q.all()
+
         if r:
             return [{'emp_id':i.emp_id
                     ,'stu_id': i.stu_id
-                    ,'stu_name':i.stu_name
-                    ,'class_id':i.class_id
+                    ,'stu_name':i.Student_Model.stu_name
+                    ,'class_id':i.Student_Model.class_id
                     ,'email':i.email
                     ,'employment_opening_date':i.employment_opening_date
                     ,'offer_issuance_date':i.offer_issuance_date
@@ -32,14 +39,36 @@ def get_employment_dao(stu_id,class_id,db):
     except:
         raise HTTPException(status_code=404,detail='信息不存在！')
 
-def add_employment_dao(e:EmploymentRequest,db):
+def add_emp_dao(o,db):
     try:
-        d = e.model_dump()
-        e1 = Employment_info(**d)
+        e1 = Employment_info(**o)
         db.add(e1)
-    except:
-        db.rollback()
-        raise HTTPException(status_code=404, detail='信息不存在！')
-    else:
         db.commit()
         return e1
+    except Exception as e:
+        db.rollback()
+        raise HTTPException(status_code=500, detail=f'新增就业信息失败: {e}')
+
+def check_stu_dao(stu_id,db):
+    stu = db.query(Student_Model).filter(Student_Model.stu_id == stu_id,Student_Model.delete_status == 0).first()
+    return stu
+
+def update_emp_dao(stu_id,o,db):
+    try:
+        rows = db.query(Employment_info).filter(Employment_info.stu_id == stu_id,Employment_info.delete_status == 0).first()
+        db.commit()
+        return rows
+    except:
+        db.rollback()
+        raise HTTPException(status_code=404,detail='该就业记录已存在')
+
+
+def delete_emp_dao(stu_id,db):
+    try:
+        rows = db.query(Employment_info).filter(Employment_info.stu_id == stu_id,Employment_info.delete_status == 0).delete()
+        db.commit()
+    except:
+        db.rollback()
+        rows = 0
+    finally:
+        return rows
diff --git a/PythonProject/dao/grade_dao.py b/PythonProject/dao/grade_dao.py
index a30c5e2..683ec95 100644
--- a/PythonProject/dao/grade_dao.py
+++ b/PythonProject/dao/grade_dao.py
@@ -4,11 +4,22 @@ from util.database import get_db
 
 from model.all_model import *
 
+# 根据id查询单条有效成绩
+def get_score_by_id_dao(score_id:int, db):
+    return db.query(WlScore).filter(
+        WlScore.id == score_id
+        ,WlScore.delete_status==1
+    ).first()
+
+# 根据stu_id+exam_order查重（新增、修改时校验重复）
+def get_score_by_stu_exam_order_dao(stu_id:str,exam_order:int,db):
+    return db.query(WlScore).filter(WlScore.stu_id==stu_id,WlScore.exam_order==exam_order,WlScore.delete_status==0).first()
 
 def get_grade_dao( stu_id:int , db):
 
     r1 =db.query(WlScore).filter(WlScore.stu_id == stu_id,WlScore.delete_status == 0).all()
     if r1:
+
         return r1
     else:
         raise HTTPException(status_code=404,detail="学生不存在")
@@ -21,15 +32,15 @@ def add_grade_dao(g,db):
         return o1
     except Exception:
         db.rollback()
-        return None
+        raise HTTPException(status_code=500,detail="学生添加失败")
 
 def update_grade_dao(score_id:int, update_data, db):
     try:
         rows = db.query(WlScore).filter(
-            WlScore.stu_id == score_id,
+            WlScore.score_id == score_id,
             WlScore.delete_status == 0
         ).update(update_data)
-    except:
+    except Exception:
         db.rollback()
         return False
     else:
diff --git a/PythonProject/dao/student_dao.py b/PythonProject/dao/student_dao.py
index e896579..e1869bf 100644
--- a/PythonProject/dao/student_dao.py
+++ b/PythonProject/dao/student_dao.py
@@ -2,22 +2,23 @@ from fastapi import Depends
 from util.database import get_db
 from model.all_model import Student_Model
 from typing import List, Optional, Dict, Any
+from datetime import datetime
 
 def add_student_dao(o,db):
     try:
         o1 = Student_Model( **o)
         db.add(o1)
+        db.commit()
+        stu_id=o1.stu_id
+        return db.query(Student_Model).filter(Student_Model.stu_id == stu_id).first()
     except:
         db.rollback()
-        return False
-    else:
-        db.commit()
-        return True
+        return None
 
 def delete_student_dao(stu_id,db):
     try:
         rows = db.query(Student_Model).filter(Student_Model.stu_id == stu_id,Student_Model.delete_status == 0)\
-            .update({'delete_status':1})
+            .update({'delete_status':1,'delete_time': datetime.now()})
         db.commit()
     except:
         db.rollback()
@@ -52,7 +53,7 @@ def get_student_dao(stu_id:Optional[int]
           q= q.filter(Student_Model.class_id == class_id,Student_Model.delete_status == 0)
         total = q.count()
         r = q.offset((page - 1) * page_size).limit(page_size).all()
-        return total,r
+        return r,total
     except:
         db.rollback()
         return [],0
diff --git a/PythonProject/model/all_model.py b/PythonProject/model/all_model.py
index 422cb09..45c78ea 100644
--- a/PythonProject/model/all_model.py
+++ b/PythonProject/model/all_model.py
@@ -184,4 +184,4 @@ class WlScore(Base):
 
     delete_time = Column(DATETIME,default=datetime.now,onupdate=datetime.now,comment='删除时间')
 
-Base.metadata.create_all(engine)
+
diff --git a/PythonProject/schema/grade_schema.py b/PythonProject/schema/grade_schema.py
index d669265..e3461ed 100644
--- a/PythonProject/schema/grade_schema.py
+++ b/PythonProject/schema/grade_schema.py
@@ -1,20 +1,21 @@
+
 from model.all_model import *
 from pydantic import BaseModel, Field, field_validator
-from fastapi import HTTPException
+from fastapi import HTTPException,Form
 
 
 class GradeRequest(BaseModel):
-    stu_id:str|None = Field(description="学生编号")
-    exam_order:int = Field(description='考核序次')
-    score:float = Field(description='成绩')
-
-class GradeUpdate(BaseModel):#修改请求体
-    exam_order: int = Field(description='考核序次')
-    score: float = Field(description='成绩')
+    stu_id:int = Form(description="学生编号")
+    exam_order:int = Form(description='考核序次')
+    score:float = Form(description='成绩')
 
 class GradeResponse(BaseModel):
     code: int = 200
     detail: str = 'OK'
-    stu_id:str
+    stu_id:int
     exam_order:int
-    score:float
\ No newline at end of file
+    score:float
+
+class GradeUpdate(BaseModel):
+    exam_order: int | None = Form( description="考核序次")
+    score: float | None = Form( description="成绩")
diff --git a/PythonProject/schema/student_schema.py b/PythonProject/schema/student_schema.py
index 2d9c631..8a16c95 100644
--- a/PythonProject/schema/student_schema.py
+++ b/PythonProject/schema/student_schema.py
@@ -6,7 +6,7 @@ from pydantic import BaseModel, field_serializer, field_validator,model_validato
 
 class StudentRequest(BaseModel):
     class_id:int |None = None
-    stu_name:str |None = None
+    stu_name:str
     age:int |None = None
     gender:str |None = None
     native_place:str |None = None
@@ -78,5 +78,5 @@ class StudentPageResponse(BaseModel):
     detail: str = "ok"
     page: int
     page_size: int
-    total: int
+    totals: int
     data: List[StugetResponse]
\ No newline at end of file