目前完成了所有的功能测试，准备进行优化

.idea/.gitignore

@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/compiler.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <annotationProcessing>
+      <profile name="Annotation profile for StuSystem" enabled="true">
+        <sourceOutputDir name="target/generated-sources/annotations" />
+        <sourceTestOutputDir name="target/generated-test-sources/test-annotations" />
+        <outputRelativeToContentRoot value="true" />
+        <processorPath useClasspath="false">
+          <entry name="$MAVEN_REPOSITORY$/org/projectlombok/lombok/1.18.42/lombok-1.18.42.jar" />
+        </processorPath>
+        <module name="StuSystem" />
+      </profile>
+    </annotationProcessing>
+  </component>
+  <component name="JavacSettings">
+    <option name="ADDITIONAL_OPTIONS_OVERRIDE">
+      <module name="StuSystem" options="-parameters" />
+    </option>
+  </component>
+</project>

.idea/encodings.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding">
+    <file url="file://$PROJECT_DIR$/src/main/java" charset="UTF-8" />
+  </component>
+</project>

.idea/jarRepositories.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteRepositoriesConfiguration">
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Central Repository" />
+      <option name="url" value="https://repo.maven.apache.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Maven Central repository" />
+      <option name="url" value="https://repo1.maven.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="jboss.community" />
+      <option name="name" value="JBoss Community repository" />
+      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
+    </remote-repository>
+  </component>
+</project>

.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="MavenProjectsManager">
+    <option name="originalFiles">
+      <list>
+        <option value="$PROJECT_DIR$/pom.xml" />
+      </list>
+    </option>
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="17" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

.mvn/wrapper/maven-wrapper.properties

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+wrapperVersion=3.3.4
+distributionType=only-script
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.11/apache-maven-3.9.11-bin.zip

pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>3.5.7</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+    <groupId>cn.zyp.stuSystem</groupId>
+    <artifactId>StuSystem</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>StuSystem</name>
+    <description>StuSystem</description>
+    <url/>
+    <licenses>
+        <license/>
+    </licenses>
+    <developers>
+        <developer/>
+    </developers>
+    <scm>
+        <connection/>
+        <developerConnection/>
+        <tag/>
+        <url/>
+    </scm>
+    <properties>
+        <java.version>17</java.version>
+    </properties>
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.mybatis.spring.boot</groupId>
+            <artifactId>mybatis-spring-boot-starter</artifactId>
+            <version>3.0.5</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.mysql</groupId>
+            <artifactId>mysql-connector-j</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <optional>true</optional>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.baomidou</groupId>
+            <artifactId>mybatis-plus-boot-starter</artifactId>
+            <version>3.5.5</version> <!-- 版本可根据需求选择，建议使用最新稳定版 -->
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <annotationProcessorPaths>
+                        <path>
+                            <groupId>org.projectlombok</groupId>
+                            <artifactId>lombok</artifactId>
+                        </path>
+                    </annotationProcessorPaths>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <configuration>
+                    <excludes>
+                        <exclude>
+                            <groupId>org.projectlombok</groupId>
+                            <artifactId>lombok</artifactId>
+                        </exclude>
+                    </excludes>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

src/main/java/cn/zyp/stusystem/StuSystemApplication.java

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+package cn.zyp.stusystem;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class StuSystemApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(StuSystemApplication.class, args);
+    }
+
+}

src/main/java/cn/zyp/stusystem/config/MyBatisPlusConfig.java

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+package cn.zyp.stusystem.config;
+
+import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
+import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class MyBatisPlusConfig {
+
+    // 配置分页插件
+    @Bean
+    public MybatisPlusInterceptor mybatisPlusInterceptor() {
+        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
+        interceptor.addInnerInterceptor(new PaginationInnerInterceptor());
+        return interceptor;
+    }
+}

src/main/java/cn/zyp/stusystem/controller/ClassController.java

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+package cn.zyp.stusystem.controller;
+
+
+import cn.zyp.stusystem.entity.GradeClass;
+import cn.zyp.stusystem.service.ClassService;
+import org.apache.ibatis.annotations.Param;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+@RestController
+@RequestMapping("/api/class")
+public class ClassController {
+
+    @Autowired
+    private ClassService classService;
+
+    //根据年级查询班级列表
+    @GetMapping("/list")
+    public Map<String, Object> getClassList(@RequestParam Integer grade,@RequestParam(required = false) String name){
+        List<GradeClass> gradeClasses = classService.findClassByGradeId(grade);
+        System.out.println(gradeClasses);
+
+        //过滤班级名称
+        if(name != null){
+           gradeClasses= gradeClasses.stream().filter(gradeClass -> gradeClass.getName().contains(name)).toList();
+        }
+        Map<String,Object> result = new HashMap<>();
+        result.put("data",gradeClasses);
+        return result;
+    }
+
+    //新增班级
+    @PostMapping("/add")
+    public boolean addClass(@RequestBody GradeClass gradeClass){
+        return classService.save(gradeClass);
+    }
+
+    //编辑班级
+    @PutMapping("/edit")
+    public boolean editClass(@RequestBody GradeClass gradeClass){
+        return classService.updateById(gradeClass);
+    }
+
+    //删除班级
+    @DeleteMapping("/delete/{id}")
+    public boolean deleteClass(@PathVariable Integer id){
+        if(classService.isClassHasStudent(id)){
+            return false;
+        }else {
+            return classService.removeById(id);
+        }
+    }
+
+    @GetMapping("/check")
+    //检查班级是否有学生
+    public Map<String,Object> checkClassHasStudent(@RequestParam Integer classId){
+        Map<String,Object> result = new HashMap<>();
+        result.put("data",classService.isClassHasStudent(classId));
+        return result;
+    }
+}

src/main/java/cn/zyp/stusystem/controller/StudentController.java

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+package cn.zyp.stusystem.controller;
+
+
+import cn.zyp.stusystem.entity.Student;
+import cn.zyp.stusystem.service.StudentService;
+import com.baomidou.mybatisplus.core.metadata.IPage;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Map;
+
+@RestController
+@RequestMapping("/api/student")
+public class StudentController {
+
+    @Autowired
+    private StudentService studentService;
+
+    //获取学生列表
+    @GetMapping("/list")
+    public Map<String,Object> getStudentList(
+            @RequestParam Integer page,  // 页码（从1开始）
+            @RequestParam Integer size,  // 每页条数
+            @RequestParam Integer grade,  // 年级（1-3）
+            @RequestParam(required = false) Long classId,  // 班级ID
+            @RequestParam(required = false) String name
+    ){
+        IPage<Student> studentPage = studentService.selectPageStudent(page,size,grade,classId,name);
+        Map<String,Object> result = new HashMap<>();
+        result.put("list",studentPage.getRecords());
+        result.put("total",studentPage.getTotal());
+
+        //测试
+        System.out.println("后端返回的学生数据：" + result);
+
+        return result;
+    }
+
+    //新增学生
+    @PostMapping("/add")
+    public boolean addStudent(@RequestBody Student student){
+        return studentService.save(student);
+    }
+
+    //编辑学生
+    @PutMapping("/edit")
+    public boolean editStudent(@RequestBody Student student){
+        return studentService.updateById(student);
+    }
+
+    //删除学生
+    @DeleteMapping("/delete/{id}")
+    public boolean deleteStudent(@PathVariable String id){
+        if(id.contains(",")){
+            String[] ids = id.split(",");
+            return studentService.removeByIds(Arrays.asList(ids));
+        }else {
+            return studentService.removeById(id);
+        }
+    }
+}

src/main/java/cn/zyp/stusystem/entity/GradeClass.java

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+package cn.zyp.stusystem.entity;
+
+import com.baomidou.mybatisplus.annotation.IdType;
+import com.baomidou.mybatisplus.annotation.TableField;
+import com.baomidou.mybatisplus.annotation.TableId;
+import com.baomidou.mybatisplus.annotation.TableName;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@TableName("class")
+@AllArgsConstructor
+@NoArgsConstructor
+public class GradeClass {
+    @TableId(type = IdType.AUTO)
+    private Long id;
+
+    @TableField("name")
+    private String name;
+
+    @TableField("grade")
+    private Integer grade;
+
+    @TableField("head_teacher")
+    private String headTeacher;
+}

src/main/java/cn/zyp/stusystem/entity/Student.java

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+package cn.zyp.stusystem.entity;
+
+import com.baomidou.mybatisplus.annotation.IdType;
+import com.baomidou.mybatisplus.annotation.TableId;
+import com.baomidou.mybatisplus.annotation.TableField;
+import com.baomidou.mybatisplus.annotation.TableName;
+import lombok.Data;
+import lombok.Data;
+
+@Data
+@TableName("student")
+public class Student {
+
+    @TableId(type = IdType.AUTO)
+    private Long id;
+
+    @TableField("name")
+    private String name;
+
+    @TableField("age")
+    private Integer age;
+
+    @TableField("gender")
+    private Integer gender;
+
+    @TableField("address")
+    private String address;
+
+    @TableField("grade")
+    private Integer grade;
+
+    @TableField("class_id")
+    private Long classId;
+
+    @TableField(exist = false)
+    private String className;
+}

src/main/java/cn/zyp/stusystem/mapper/ClassMapper.java

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+package cn.zyp.stusystem.mapper;
+
+import cn.zyp.stusystem.entity.GradeClass;
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import org.apache.ibatis.annotations.Mapper;
+
+
+@Mapper
+public interface ClassMapper extends BaseMapper<GradeClass> {
+}

src/main/java/cn/zyp/stusystem/mapper/StudentMapper.java

@@ -0,0 +1,9 @@
+package cn.zyp.stusystem.mapper;
+
+import cn.zyp.stusystem.entity.Student;
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import org.apache.ibatis.annotations.Mapper;
+
+@Mapper
+public interface StudentMapper extends BaseMapper<Student> {
+}

src/main/java/cn/zyp/stusystem/service/ClassService.java

@@ -0,0 +1,14 @@
+package cn.zyp.stusystem.service;
+
+import cn.zyp.stusystem.entity.GradeClass;
+import com.baomidou.mybatisplus.extension.service.IService;
+
+import java.util.List;
+
+public interface ClassService extends IService<GradeClass> {
+    //根据年级查询班级
+    public List<GradeClass> findClassByGradeId(Integer gradeId);
+
+    //查询班级是否还有学生
+    public boolean isClassHasStudent(Integer classId);
+}

src/main/java/cn/zyp/stusystem/service/StudentService.java

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+package cn.zyp.stusystem.service;
+
+import cn.zyp.stusystem.entity.Student;
+import com.baomidou.mybatisplus.core.metadata.IPage;
+import com.baomidou.mybatisplus.extension.service.IService;
+
+public interface StudentService extends IService<Student> {
+
+    //分页查询
+    IPage<Student> selectPageStudent(Integer page,Integer size,Integer grade,Long classId,String name);
+
+}

src/main/java/cn/zyp/stusystem/service/impl/ClassServiceImpl.java

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+package cn.zyp.stusystem.service.impl;
+
+
+import cn.zyp.stusystem.entity.GradeClass;
+import cn.zyp.stusystem.entity.Student;
+import cn.zyp.stusystem.mapper.ClassMapper;
+import cn.zyp.stusystem.mapper.StudentMapper;
+import cn.zyp.stusystem.service.ClassService;
+import com.baomidou.mybatisplus.annotation.IdType;
+import com.baomidou.mybatisplus.annotation.TableField;
+import com.baomidou.mybatisplus.annotation.TableId;
+import com.baomidou.mybatisplus.annotation.TableName;
+import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import lombok.ConfigurationKeys;
+import lombok.Data;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+
+@Service
+public class ClassServiceImpl extends ServiceImpl<ClassMapper, GradeClass> implements ClassService {
+
+    @Autowired
+    private StudentMapper studentMapper;
+
+    @Override
+    public List<GradeClass> findClassByGradeId(Integer gradeId) {
+        QueryWrapper<GradeClass> queryWrapper = new QueryWrapper<>();
+        queryWrapper.eq("grade",gradeId);
+        return baseMapper.selectList(queryWrapper);
+    }
+
+    @Override
+    public boolean isClassHasStudent(Integer classId) {
+        QueryWrapper<Student> queryWrapper = new QueryWrapper<>();
+        queryWrapper.eq("class_id",classId);
+
+        return studentMapper.selectCount(queryWrapper)>0;
+    }
+}

src/main/java/cn/zyp/stusystem/service/impl/StudentServiceImpl.java

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+package cn.zyp.stusystem.service.impl;
+
+import cn.zyp.stusystem.entity.GradeClass;
+import cn.zyp.stusystem.entity.Student;
+import cn.zyp.stusystem.mapper.ClassMapper;
+import cn.zyp.stusystem.mapper.StudentMapper;
+import cn.zyp.stusystem.service.StudentService;
+import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
+import com.baomidou.mybatisplus.core.metadata.IPage;
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+
+@Service
+public class StudentServiceImpl extends ServiceImpl<StudentMapper, Student> implements StudentService {
+
+    @Autowired
+    private ClassMapper classMapper;
+
+    @Override
+    public IPage<Student> selectPageStudent(Integer page, Integer size, Integer grade, Long classId, String name) {
+
+        //创建分页对象
+        IPage<Student> studentPage = new Page<>(page,size);
+
+        //构建查询条件
+        QueryWrapper<Student> queryWrapper = new QueryWrapper<>();
+        queryWrapper.eq(grade != null, "grade", grade);
+        queryWrapper.eq(classId != null && classId > 0, "class_id", classId);
+        queryWrapper.like(name != null && !name.isEmpty(), "name", name);
+        studentPage = baseMapper.selectPage(studentPage, queryWrapper);
+
+        //关联查询班级名称
+        List<Student> students = studentPage.getRecords();
+        if (students != null && students.size() > 0) {
+            List<Long> classIds = students.stream().map(Student::getClassId).collect(Collectors.toList());
+            QueryWrapper<GradeClass> classQueryWrapper = new QueryWrapper<>();
+            classQueryWrapper.in("id", classIds);
+            List<GradeClass> classes = classMapper.selectList(classQueryWrapper);
+
+            //转换为Map
+            Map<Long, String> classMap = classes.stream().collect(Collectors.toMap(GradeClass::getId, GradeClass::getName));
+
+            students.forEach(student -> student.setClassName(classMap.get(student.getClassId())));
+
+
+        }
+        return studentPage;
+    }
+}
+

src/main/resources/application.yaml

@@ -0,0 +1,13 @@
+spring:
+  datasource:
+    driver-class-name: com.mysql.cj.jdbc.Driver
+    url: jdbc:mysql://localhost:3306/student_management?useUnicode=true&characterEncoding=utf8&serverTimezone=Asia/Shanghai
+    username: root
+    password: 123456
+
+# MyBatis-Plus ??
+mybatis-plus:
+  mapper-locations: classpath:mapper/*.xml  # Mapper.xml ????
+  type-aliases-package: com.example.student.entity  # ??????
+  configuration:
+    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl  # ??SQL?????????

src/test/java/cn/zyp/stusystem/stusystem/StuSystemApplicationTests.java

@@ -0,0 +1,13 @@
+package cn.zyp.stusystem.stusystem;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class StuSystemApplicationTests {
+
+    @Test
+    void contextLoads() {
+    }
+
+}

target/classes/application.yaml

@@ -0,0 +1,13 @@
+spring:
+  datasource:
+    driver-class-name: com.mysql.cj.jdbc.Driver
+    url: jdbc:mysql://localhost:3306/student_management?useUnicode=true&characterEncoding=utf8&serverTimezone=Asia/Shanghai
+    username: root
+    password: 123456
+
+# MyBatis-Plus ??
+mybatis-plus:
+  mapper-locations: classpath:mapper/*.xml  # Mapper.xml ????
+  type-aliases-package: com.example.student.entity  # ??????
+  configuration:
+    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl  # ??SQL?????????