final

pom.xml

@@ -0,0 +1,121 @@
+<?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>
+    <groupId>com</groupId>
+    <artifactId>demo</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>demo</name>
+    <description>demo</description>
+    <properties>
+        <java.version>1.8</java.version>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <spring-boot.version>2.6.13</spring-boot.version>
+    </properties>
+    <dependencies>
+        <dependency>
+            <groupId>org.mybatis.spring.boot</groupId>
+            <artifactId>mybatis-spring-boot-starter</artifactId>
+            <version>2.2.2</version>
+        </dependency>
+        <!--easy excel依赖-->
+        <dependency>
+            <groupId>cn.hutool</groupId>
+            <artifactId>hutool-all</artifactId>
+            <version>5.8.18</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.poi</groupId>
+            <artifactId>poi-ooxml</artifactId>
+            <version>5.2.3</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>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <!-- excel 导出工具 -->
+        <!-- Apache POI的核心库，用于处理HSSF格式的Excel（.xls）文件 -->
+        <dependency>
+            <groupId>org.apache.poi</groupId>
+            <artifactId>poi</artifactId>
+            <version>5.2.3</version> <!-- 选择合适的版本 -->
+        </dependency>
+
+        <dependency>
+            <groupId>org.apache.poi</groupId>
+            <artifactId>poi-ooxml</artifactId>
+            <version>5.2.3</version> <!-- 选择合适的版本 -->
+        </dependency>
+
+        <!-- Apache Commons IO for file handling (optional but useful) -->
+        <dependency>
+            <groupId>commons-io</groupId>
+            <artifactId>commons-io</artifactId>
+            <version>2.11.0</version> <!-- 选择合适的版本 -->
+        </dependency>
+        <!-- Apache POI的OOXML模式库，通常与poi-ooxml一起使用，提供了处理OOXML格式文件时所需的XML模式定义 -->
+
+
+    </dependencies>
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-dependencies</artifactId>
+                <version>${spring-boot.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.1</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                    <encoding>UTF-8</encoding>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <version>${spring-boot.version}</version>
+                <configuration>
+                    <mainClass>com.demo.DemoApplication</mainClass>
+                    <skip>true</skip>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>repackage</id>
+                        <goals>
+                            <goal>repackage</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

src/main/java/com/demo/DemoApplication.java

@@ -0,0 +1,16 @@
+package com.demo;
+
+import org.mybatis.spring.annotation.MapperScan;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+@MapperScan("com.demo.mapper")
+
+public class DemoApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(DemoApplication.class, args);
+    }
+
+}

src/main/java/com/demo/controller/ClazzController.java

@@ -0,0 +1,40 @@
+package com.demo.controller;
+
+import com.demo.entity.Clazz;
+import com.demo.entity.Student;
+import com.demo.mapper.ClazzMapper;
+import org.apache.ibatis.annotations.Delete;
+import org.apache.ibatis.annotations.Update;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.bind.annotation.*;
+
+import javax.annotation.Resource;
+import java.util.List;
+
+@RestController
+@RequestMapping("/clazz")
+public class ClazzController {
+    @Resource
+    ClazzMapper clazzMapper;
+
+    @PostMapping("/save")
+    public String addClazz(@RequestBody Clazz clazz){
+        clazzMapper.save(clazz);
+        return "success";
+    }
+    @GetMapping("/list")
+    public List<Clazz> getClazz(){
+        return clazzMapper.findAll();
+    }
+    @DeleteMapping("/{name}")
+    public String deleteClazz(@PathVariable("name") String name){
+        clazzMapper.deleteByname(name);
+        return "success";
+    }
+    @PutMapping("/update")
+    public String updateClazz(@RequestBody Clazz clazz){
+        clazzMapper.updateById(clazz);
+        return "success";
+    }
+
+}

src/main/java/com/demo/controller/ExcelController.java

@@ -0,0 +1,28 @@
+package com.demo.controller;
+
+import cn.hutool.poi.excel.ExcelReader;
+import cn.hutool.poi.excel.ExcelUtil;
+import com.demo.entity.Student;
+import com.demo.mapper.StudentMapper;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.multipart.MultipartFile;
+
+import javax.annotation.Resource;
+import java.io.InputStream;
+import java.nio.channels.MulticastChannel;
+import java.util.List;
+
+@RestController
+@RequestMapping("/excel")
+@CrossOrigin(origins = "*")
+public class ExcelController {
+    @Resource
+    private StudentMapper studentMapper;
+    @PostMapping("/import")
+    public void imp(@RequestBody MultipartFile file)throws Exception{
+        InputStream inputStream = file.getInputStream();
+        ExcelReader reader = ExcelUtil.getReader(inputStream);
+        List<Student> students = reader.readAll(Student.class);
+        studentMapper.batchInsert(students);
+    }
+}

src/main/java/com/demo/controller/StudentController.java

@@ -0,0 +1,40 @@
+package com.demo.controller;
+
+import com.demo.entity.Clazz;
+import com.demo.entity.Student;
+import com.demo.mapper.StudentMapper;
+import lombok.SneakyThrows;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.multipart.MultipartFile;
+
+import javax.annotation.Resource;
+import java.util.List;
+
+@RestController
+@RequestMapping("/student")
+public class StudentController {
+    @Resource
+    StudentMapper studentMapper;
+    @GetMapping
+    public List<Student> getStudent(){
+        return studentMapper.findAll();
+    }
+    @PostMapping("/set")
+    public String addStudent(@RequestBody Student student){
+        studentMapper.save(student);
+        return "success";
+    }
+    @GetMapping("/{clazz}")
+    public List<Student> getStudent1(@PathVariable("clazz") String clazz){
+
+        return studentMapper.findByclazz(clazz);
+    }
+    @PutMapping("/update")
+    public String updateStudent(@RequestBody Student student){
+        studentMapper.updateByname(student);
+        return "success";
+    }
+
+
+
+}

src/main/java/com/demo/entity/Clazz.java

@@ -0,0 +1,9 @@
+package com.demo.entity;
+
+import lombok.Data;
+
+@Data
+public class Clazz {
+    private String name;
+    private int id;
+}

src/main/java/com/demo/entity/Student.java

@@ -0,0 +1,16 @@
+package com.demo.entity;
+
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class Student {
+    private String id;
+    private String name;
+    private int point;
+    private String clazz;
+}

src/main/java/com/demo/mapper/ClazzMapper.java

@@ -0,0 +1,25 @@
+package com.demo.mapper;
+
+import com.demo.entity.Clazz;
+import com.demo.entity.Student;
+import org.apache.ibatis.annotations.Delete;
+import org.apache.ibatis.annotations.Insert;
+import org.apache.ibatis.annotations.Select;
+import org.apache.ibatis.annotations.Update;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.bind.annotation.PathVariable;
+
+import java.util.List;
+
+public interface ClazzMapper {
+    @Select("select * from classes")
+    List<Clazz> findAll();
+    @Insert("INSERT INTO classes (name) VALUES (#{name});")
+    @Transactional
+    void save(Clazz clazz);
+    @Delete("delete from classes where name = #{name}")
+    void deleteByname(String name);
+    @Update("update classes set name = #{name} where id = #{id}")
+    @Transactional
+    void updateById(Clazz clazz);
+}

src/main/java/com/demo/mapper/StudentMapper.java

@@ -0,0 +1,38 @@
+package com.demo.mapper;
+
+import com.demo.entity.Clazz;
+import com.demo.entity.Student;
+import org.apache.ibatis.annotations.Insert;
+import org.apache.ibatis.annotations.Param;
+import org.apache.ibatis.annotations.Select;
+import org.apache.ibatis.annotations.Update;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.List;
+
+public interface StudentMapper {
+    @Select("select * from students")
+    List<Student> findAll();
+
+    @Insert("INSERT INTO students (`id`, `name`, `point`, `clazz`) VALUES (#{id},#{name},#{point},#{clazz});")
+    @Transactional
+    void save(Student student);
+
+    @Select("select * from students where clazz = #{clazz}")
+    List<Student> findByclazz(String clazz);
+
+    @Update("update students set point = #{point} where name = #{name}")
+    @Transactional
+    void updateByname(Student student);
+
+    @Insert({
+            "<script>",
+            "INSERT INTO students (id, name, point, clazz) VALUES ",
+            "<foreach collection='list' item='student' separator=','>",
+            "(#{student.id}, #{student.name}, #{student.point}, #{student.clazz})",
+            "</foreach>",
+            "</script>"
+    })
+    void batchInsert(@Param("list") List<Student> list);
+
+}

src/main/resources/application.yml

@@ -0,0 +1,8 @@
+server:
+  port: 8090
+spring:
+  datasource:
+    driver-class-name: com.mysql.cj.jdbc.Driver
+    url: jdbc:mysql://localhost:3306/demo?serverTimezone=GMT%2B8&characterEncoding=utf-8&useSSL=false
+    username: root
+    password: 123456

src/test/java/com/demo/DemoApplicationTests.java

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