简单学生管理系统

SimpleStudentManagementSystem/src/main/java/edu/gjq/controller/CourseController.java

@@ -1,6 +1,8 @@
 package edu.gjq.controller;
 
 import edu.gjq.pojo.Course;
+import edu.gjq.pojo.Score;
+import edu.gjq.pojo.StudentScore;
 import edu.gjq.service.CourseService;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Controller;
@@ -64,10 +66,8 @@ public class CourseController {
     // 查询课程学生选课情况
     @GetMapping("/enrollments/{courseId}")
     public String getEnrollments(@PathVariable String courseId, Model model) {
-        // 假设有一个方法 getEnrollmentsByCourseId 来获取选课情况
+        List<StudentScore> scores = courseService.getStudentScoresByCourseId(courseId);
-        // 这里需要根据实际的业务逻辑来实现
+        model.addAttribute("scores", scores);
-        List<?> enrollments = courseService.getEnrollmentsByCourseId(courseId);
+        return "scores";
-        model.addAttribute("enrollments", enrollments);
-        return "enrollments";
     }
 }

SimpleStudentManagementSystem/src/main/java/edu/gjq/mapper/CourseMapper.java

@@ -1,7 +1,8 @@
 package edu.gjq.mapper;
 
 import edu.gjq.pojo.Course;
-import edu.gjq.pojo.Enrollment;
+import edu.gjq.pojo.Score;
+import edu.gjq.pojo.StudentScore;
 
 import java.util.List;
 
@@ -21,7 +22,7 @@ public interface CourseMapper {
     // 删除课程
     void deleteById(String id);
 
-    // 查询课程学生选课情况
+    // 查询某个课程的学生选课情况
-    List<Enrollment> getEnrollmentsByCourseId(String courseId);
+    List<StudentScore> getStudentScoresByCourseId(String courseId);
 
 }

SimpleStudentManagementSystem/src/main/java/edu/gjq/mapper/ScoreMapper.java

@@ -21,4 +21,5 @@ public interface ScoreMapper {
     
     // 根据no查询成绩
     List<Score> getAll();
+
 }

SimpleStudentManagementSystem/src/main/java/edu/gjq/pojo/Enrollment.java

@@ -1,11 +0,0 @@
-package edu.gjq.pojo;
-
-import lombok.Data;
-
-@Data
-public class Enrollment {
-    private String studentId; // 学生ID
-    private String studentName; // 学生姓名
-    private Integer courseId; // 课程ID
-    private String courseName; // 课程名称
-}

SimpleStudentManagementSystem/src/main/java/edu/gjq/pojo/Score.java

@@ -15,4 +15,14 @@ public class Score extends BaseEntity{
     // 学生和课程是一的一方
     private Student student;
     private Course course;
+
+    public void setStudentId(String studentId) {
+        this.studentId = studentId;
+    }
+
+    public void setCourseId(String courseId) {
+        this.courseId = courseId;
+    }
+
+
 }

SimpleStudentManagementSystem/src/main/java/edu/gjq/pojo/StudentScore.java

@@ -8,4 +8,13 @@ import java.util.List;
 public class StudentScore {
     private Student student;
     private List<Score> scores;
+
+
+    public Student getStudent() {
+        return student;
+    }
+
+    public List<Score> getScore() {
+        return scores;
+    }
 }

SimpleStudentManagementSystem/src/main/java/edu/gjq/service/CourseService.java

@@ -1,7 +1,7 @@
 package edu.gjq.service;
 
 import edu.gjq.pojo.Course;
-import edu.gjq.pojo.Enrollment;
+import edu.gjq.pojo.StudentScore;
 
 import java.util.List;
 
@@ -11,5 +11,5 @@ public interface CourseService {
     Course getCourseById(String id);
     void updateCourse(Course course);
     void deleteCourse(String id);
-    List<Enrollment> getEnrollmentsByCourseId(String courseId);
+    List<StudentScore> getStudentScoresByCourseId(String courseId);
 }

SimpleStudentManagementSystem/src/main/java/edu/gjq/service/impl/CourseServiceImpl.java

@@ -2,7 +2,7 @@ package edu.gjq.service.impl;
 
 import edu.gjq.mapper.CourseMapper;
 import edu.gjq.pojo.Course;
-import edu.gjq.pojo.Enrollment;
+import edu.gjq.pojo.StudentScore;
 import edu.gjq.service.CourseService;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
@@ -43,7 +43,7 @@ public class CourseServiceImpl implements CourseService {
     }
 
     @Override
-    public List<Enrollment> getEnrollmentsByCourseId(String courseId) {
+    public List<StudentScore> getStudentScoresByCourseId(String courseId) {
-        return (List<Enrollment>) courseMapper.getEnrollmentsByCourseId(courseId);
+        return courseMapper.getStudentScoresByCourseId(courseId);
     }
 }

SimpleStudentManagementSystem/src/main/resources/mapper/CourseMapper.xml

@@ -23,6 +23,7 @@
         </where>
     </select>
 
+
     <!-- 插入课程 -->
     <insert id="insertCourse" parameterType="Course">
         insert into course (id, name) values (#{id}, #{name})
@@ -42,21 +43,37 @@
         delete from course where id = #{id}
     </delete>
 
-    <!-- 查询课程学生选课情况 -->
+
-    <select id="getEnrollmentsByCourseId" resultType="Enrollment">
+    <select id="getStudentScoresByCourseId" resultMap="StudentScoreResultMap">
-        SELECT s.id as student_id, s.name as student_name, c.id as course_id, c.name as course_name
+        SELECT
-        FROM student s
+        s.id as "student.id",
-        JOIN enrollment e ON s.id = e.student_id
+        s.name as "student.name",
-        JOIN course c ON e.course_id = c.id
+        s.gender as "student.gender",
-        WHERE c.id = #{courseId}
+        s.birthday as "student.birthday",
+        sc.id as "scores[0].id",
+        sc.student_id as "scores[0].studentId",
+        sc.course_id as "scores[0].courseId",
+        sc.score as "scores[0].score"
+        FROM
+        score sc
+        JOIN student s ON sc.student_id = s.id
+        WHERE
+        sc.course_id = #{courseId}
     </select>
 
-    <!-- 定义Enrollment结果映射 -->
+    <resultMap id="StudentScoreResultMap" type="edu.gjq.pojo.StudentScore">
-    <resultMap id="EnrollmentResult" type="Enrollment">
+        <association property="student" javaType="edu.gjq.pojo.Student">
-        <id column="student_id" property="studentId" />
+            <id column="student.id" property="id"/>
-        <result column="student_name" property="studentName" />
+            <result column="student.name" property="name"/>
-        <result column="course_id" property="courseId" />
+            <result column="student.gender" property="gender"/>
-        <result column="course_name" property="courseName" />
+            <result column="student.birthday" property="birthday"/>
+        </association>
+        <collection property="scores" ofType="edu.gjq.pojo.Score">
+            <id column="scores[0].id" property="id"/>
+            <result column="scores[0].studentId" property="studentId"/>
+            <result column="scores[0].courseId" property="courseId"/>
+            <result column="scores[0].score" property="score"/>
+        </collection>
     </resultMap>
 
 </mapper>

SimpleStudentManagementSystem/src/main/resources/mapper/ScoreMapper.xml

@@ -11,12 +11,12 @@
 
 
     <update id="update">
-        update grade
+        update score
         <set>
-            <if test="grade != null">grade = #{grade},</if>
+            <if test="score != null">score = #{score},</if>
-            <if test="updateTime != null"> update_time = #{updateTime}</if>
+            <if test="updateTime != null">update_time = #{updateTime}</if>
         </set>
-        where no = #{no}
+        where student_id = #{studentId} and course_id = #{courseId}
     </update>
 
     <!-- 删除一条成绩    -->
@@ -37,6 +37,7 @@
         FROM score, student as s, course as c
         WHERE s.id = score.student_id and c.id = score.course_id
     </select>
+
     <resultMap id="ScoreWithName" type="Score">
         <id column="id" property="id" />
         <result column="score" property="score" />
@@ -48,31 +49,6 @@
         </association>
     </resultMap>
 
-    <!--    <select id="getByNo" resultMap="GradeWithName">-->
+
-<!--        SELECT-->
-<!--        `no`,-->
-<!--        student_id,-->
-<!--        course_id,-->
-<!--        grade,-->
-<!--        g.create_time,-->
-<!--        g.update_time,-->
-<!--        s.id as uid,-->
-<!--        s.`name` as student_name-->
-<!--        FROM grade g-->
-<!--        JOIN student s ON s.id = g.student_id-->
-<!--        WHERE `no` = #{no}-->
-<!--    </select>-->
-<!--    <resultMap id="GradeWithName" type="Score">-->
-<!--        <id column="no" property="no" />-->
-<!--        <result column="student_id" property="studentID" />-->
-<!--        <result column="course_id" property="courseID" />-->
-<!--        <result column="grade" property="grade"></result>-->
-<!--        <result column="creat_time" property="createTime" />-->
-<!--        <result column="update_time" property="updateTime" />-->
-<!--        <association property="student" javaType="Student">-->
-<!--            <id column="uid" property="id" />-->
-<!--            <result column="student_name" property="name" />-->
-<!--        </association>-->
-<!--    </resultMap>-->
 
 </mapper>

SimpleStudentManagementSystem/src/test/java/edu/gjq/ApplicationTests.java

@@ -51,39 +51,28 @@ class ApplicationTests {
     public void testInsertAccount(){
         // 新增账号
         Account account = new Account();
-        account.setAccount("12143");
+        account.setAccount("12149");
         account.setPassword("123456");
         account.setCreateBy(1);
         LocalDateTime now = LocalDateTime.now();
         account.setCreateTime(now);
         accountMapper.insertAccount(account);
     }
-//    @Test
-//    public void testInsertStudent() {
-//        Student student = new Student();
-//        student.setId("12149");
-//        student.setName("小星星");
-//        student.setGender(0);
-//        student.setBirthday(LocalDate.of(2014, 6, 4));
-//        student.setCreateBy(1);
-//        LocalDateTime now = LocalDateTime.now();
-//        student.setCreateTime(now);
-//        studentMapper.insertStudent(student);
-//
-//    }
     @Test
-    public void testInsertScore(){
+    public void testInsertStudent() {
-        Score score = new Score();
+        Student student = new Student();
-        score.setStudentId("12142");
+        student.setId("12149");
-        score.setCourseId("106");
+        student.setName("小星星");
-        score.setScore(60);
+        student.setGender(0);
-        score.setCreateBy(1);
+        student.setBirthday(LocalDate.of(2014, 6, 4));
+        student.setCreateBy(1);
         LocalDateTime now = LocalDateTime.now();
-        score.setCreateTime(now);
+        student.setCreateTime(now);
-        scoreMapper.insert(score);
+        studentMapper.insertStudent(student);
-        System.out.println(score.getId());
+
     }
-    
+
+//    更新学生姓名
     @Test
     public void testUpdateStudent(){
         Student student = new Student();
@@ -145,31 +134,48 @@ class ApplicationTests {
             System.out.println("课程：" + score.getCourse().getName() + "，成绩：" + score.getScore());
         }
     }
-    /*@Test
+    //    新增课程成绩
+    @Test
+    public void testInsertScore(){
+        Score score = new Score();
+        score.setStudentId("12142");
+        score.setCourseId("106");
+        score.setScore(60);
+        score.setCreateBy(1);
+        LocalDateTime now = LocalDateTime.now();
+        score.setCreateTime(now);
+        scoreMapper.insert(score);
+        System.out.println(score.getId());
+    }
+    @Test
     public void testGradeUpdate(){
         Score score = new Score();
-        score.setStudentID("12142");
+        score.setStudentId("12142");
-        score.setCourseID("101");
+        score.setCourseId("106");
-        score.setGrade(90);
+        score.setScore(100);
         score.setUpdateTime(LocalDateTime.now());
-        gradeMapper.update(score);
+        scoreMapper.update(score);
         System.out.println(score);
     }
-    
+
-    
-    @Test
-    public void testGradeDelete(){
-        gradeMapper.deleteByNo(24);
-    }
-    
 
     @Test
-    public void testGetByNo(){
+    public void testGradeDelete(){
-        Score score = gradeMapper.getByNo(1);
+        scoreMapper.deleteById(16);
-        System.out.println(score);
     }
-    
+
-   */
+
+
+
+    /*
+ * 课程管理
+查询所有课程名
+增加某个课程
+更新某个课程
+删除某个课程
+                *
+                *
+             * */
     @Test
     public void testGetAllCourses() {
         List<Course> courses = courseMapper.getAll();
@@ -196,5 +202,22 @@ class ApplicationTests {
     public void testDeleteCourse() {
         courseMapper.deleteById("107");
     }
-    
+
+//查询这个课程学生选课情况
+    @Test
+    public void testGetStudentScoresByCourseId() {
+        List<StudentScore> studentScores = courseMapper.getStudentScoresByCourseId("101");
+        studentScores.forEach(studentScore -> {
+            Student student = studentScore.getStudent();
+            List<Score> scores = studentScore.getScore();
+
+            System.out.println("学生ID: " + student.getId());
+            System.out.println("学生姓名: " + student.getName());
+
+            scores.forEach(score -> {
+                System.out.println("课程ID: " + score.getCourseId());
+                System.out.println("成绩: " + score.getScore());
+            });
+        });
+    }
 }