显示班级

ruoyi-modules/ruoyi-student/src/main/java/org/dromara/controller/ClsController.java

@@ -60,4 +60,9 @@ public class ClsController {
         return Result.success(cls);
     }
 
+    @DeleteMapping("/class/{id}")
+    public Result deleteClass(@PathVariable Integer id) {
+        clsService.deleteById(id);
+        return Result.success();
+    }
 }

ruoyi-modules/ruoyi-student/src/main/java/org/dromara/controller/StudentController.java

@@ -1,10 +1,15 @@
 package org.dromara.controller;
 
+import com.baomidou.mybatisplus.core.metadata.IPage;
 import jakarta.annotation.Resource;
 import org.dromara.common.Result;
+import org.dromara.common.core.domain.R;
+import org.dromara.common.mybatis.core.page.PageQuery;
+import org.dromara.common.mybatis.core.page.TableDataInfo;
 import org.dromara.domain.Student;
 import org.dromara.service.IStudentService;
 import org.dromara.service.impl.StudentService;
+import org.springframework.stereotype.Repository;
 import org.springframework.web.bind.annotation.*;
 
 import java.util.List;
@@ -52,6 +57,15 @@ public class StudentController {
         return Result.success(list);
     }
 
+    /**
+     * 分页查询
+     */
+    @PostMapping("/selectPage")
+    public R<IPage<Student>> selectPage(@RequestBody Student student) {
+        IPage<Student> list = studentService.selectPage(student);
+        return R.ok(list);
+    }
+
     /**
      * 查询单个数据
      */
@@ -61,4 +75,5 @@ public class StudentController {
         return Result.success(student);
     }
 
+
 }

ruoyi-modules/ruoyi-student/src/main/java/org/dromara/domain/Student.java

@@ -12,6 +12,10 @@ public class Student {
     private Integer age;
     private String sex;
     private String address;
-    private String clsId;
+    private Integer clsId;
-    private String courseId;
+    private Integer courseId;
+    private String clsName;
+
+    private Integer pageNum;
+    private Integer pageSize;
 }

ruoyi-modules/ruoyi-student/src/main/java/org/dromara/mapper/ClsMapper.java

@@ -1,19 +1,20 @@
 package org.dromara.mapper;
 
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 import org.apache.ibatis.annotations.Delete;
 import org.apache.ibatis.annotations.Select;
 import org.dromara.domain.Cls;
 
 import java.util.List;
 
-public interface ClsMapper {
+public interface ClsMapper extends BaseMapper<Cls> {
     List<Cls> selectAll(Cls cls);
     @Select("select * from cls where id = #{id}")
     Cls selectById(Integer id);
 
-    void insert(Cls cls);
+    int insert(Cls cls);
 
-    void updateById(Cls cls);
+    int updateById(Cls cls);
 
     @Delete("delete  from `cls` where id = #{id}")
     void deleteById(Integer id);

ruoyi-modules/ruoyi-student/src/main/java/org/dromara/mapper/StudentMapper.java

@@ -1,8 +1,11 @@
 package org.dromara.mapper;
 
+import com.baomidou.mybatisplus.core.metadata.IPage;
 import org.apache.ibatis.annotations.Delete;
 import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Param;
 import org.apache.ibatis.annotations.Select;
+import org.dromara.common.mybatis.core.page.PageQuery;
 import org.dromara.domain.Student;
 
 import java.util.List;
@@ -20,4 +23,11 @@ public interface StudentMapper {
     void deleteById(Integer id);
     @Select("select * from student where username = #{username}")
     Student selectByUsername(String username);
+
+    List<Student> selectByClsId(Integer clsId);
+
+    int updateByClsId(@Param("clsId") Integer clsId);
+
+    IPage<Student> selectPage(@Param("student") Student student, IPage<Student> page);
+
 }

ruoyi-modules/ruoyi-student/src/main/java/org/dromara/service/IClsService.java

@@ -1,5 +1,6 @@
 package org.dromara.service;
 
+import com.baomidou.mybatisplus.extension.service.IService;
 import org.dromara.domain.Cls;
 
 import java.util.List;
@@ -10,7 +11,7 @@ import java.util.List;
  * @author SkySource
  * @Date: 2025/8/8 9:18
  */
-public interface IClsService {
+public interface IClsService extends IService<Cls> {
     void add(Cls cls);
 
     void update(Cls cls);
@@ -20,4 +21,5 @@ public interface IClsService {
     List<Cls> selectAll(Cls cls);
 
     Cls selectById( Integer id);
+
 }

ruoyi-modules/ruoyi-student/src/main/java/org/dromara/service/IStudentService.java

@@ -1,5 +1,8 @@
 package org.dromara.service;
 
+import com.baomidou.mybatisplus.core.metadata.IPage;
+import org.dromara.common.mybatis.core.page.PageQuery;
+import org.dromara.common.mybatis.core.page.TableDataInfo;
 import org.dromara.domain.Student;
 
 import java.util.List;
@@ -20,4 +23,7 @@ public interface IStudentService {
     List<Student> selectAll(Student student);
 
     Student selectById( Integer id);
+
+
+    IPage<Student> selectPage(Student student);
 }

ruoyi-modules/ruoyi-student/src/main/java/org/dromara/service/impl/ClsService.java

@@ -1,37 +1,53 @@
 package org.dromara.service.impl;
 
 
+import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import jakarta.annotation.Resource;
 import org.dromara.domain.Cls;
+import org.dromara.domain.Student;
 import org.dromara.mapper.ClsMapper;
+import org.dromara.mapper.StudentMapper;
 import org.dromara.service.IClsService;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
+import java.util.ArrayList;
 import java.util.List;
+import java.util.stream.Collectors;
 
 @Service
-public class ClsService implements IClsService {
+public class ClsService extends ServiceImpl<ClsMapper, Cls> implements IClsService {
     @Resource
     private ClsMapper clsMapper;
+    @Resource
+    private StudentMapper studentMapper;
 
+    @Transactional
     public void add(Cls cls) {
         clsMapper.insert(cls);
     }
 
+    @Transactional
     public void update(Cls cls) {
         clsMapper.updateById(cls);
     }
 
+    @Transactional
     public void deleteById(Integer id) {
+       studentMapper.updateByClsId(id);
         clsMapper.deleteById(id);
     }
 
+    @Transactional
     public List<Cls> selectAll(Cls cls) {
         return clsMapper.selectAll(cls);
     }
 
-    public Cls selectById( Integer id) {
+    @Transactional(readOnly = true)
+    public Cls selectById(Integer id) {
         return clsMapper.selectById(id);
     }
+
 }
 

ruoyi-modules/ruoyi-student/src/main/java/org/dromara/service/impl/StudentService.java

@@ -1,7 +1,10 @@
 package org.dromara.service.impl;
 
 
+import com.baomidou.mybatisplus.core.metadata.IPage;
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import jakarta.annotation.Resource;
+import org.dromara.common.mybatis.core.page.PageQuery;
 import org.dromara.domain.Student;
 import org.dromara.mapper.StudentMapper;
 import org.dromara.service.IStudentService;
@@ -38,5 +41,11 @@ public class StudentService implements IStudentService {
     public Student selectById( Integer id) {
         return studentMapper.selectById(id);
     }
+
+    @Override
+    public IPage<Student> selectPage(Student student) {
+        IPage<Student> page = new Page<>(student.getPageNum(), student.getPageSize());
+        return studentMapper.selectPage(student,page);
+    }
 }
 

ruoyi-modules/ruoyi-student/src/main/resources/mapper/system/StudentMapper.xml

@@ -12,6 +12,41 @@
         </where>
         order by student.id desc
     </select>
+    <select id="selectByClsId" resultType="org.dromara.domain.Student">
+        select *
+        from student
+        where id = #{clsId}
+        order by id desc
+    </select>
+
+    <select id="selectPage" resultType="org.dromara.domain.Student">
+        select s.id,
+               s.username,
+               s.password,
+               s.role,
+               s.name,
+               s.age,
+               s.sex,
+               s.address,
+               s.cls_id,
+               s.course_id,
+               s.avatar,
+               s.create_dept,
+               s.create_by,
+               s.create_time,
+               s.update_by,
+               s.update_time,
+               s.remark,
+               s.del_flag,
+               c.name as clsName
+        from student as s
+                 left join cls as c on s.cls_id = c.id
+        <where>
+            <if test="student.name != null">s.name like concat('%', #{student.name}, '%')</if>
+        </where>
+        order by s.id desc
+    </select>
+
     <insert id="insert" parameterType="org.dromara.domain.Student">
         insert into `student` (username, password, role, name, age, sex, address,  cls_id, course_id)
         values (#{username}, #{password}, #{role}, #{name}, #{age}, #{sex}, #{address}, #{clsId}, #{courseId})
@@ -30,4 +65,10 @@
             course_id= #{courseId}
         where id = #{id}
     </update>
+
+    <update id="updateByClsId">
+        UPDATE student
+            set cls_id = null
+        where cls_id = #{clsId}
+    </update>
 </mapper>