Bagaimana SpringBoot menyepadukan mybatis+mybatis-plus

Kerja penyediaan

1. Sediakan jadual data berikut

CREATE TABLE `student` (
  `id` varchar(32) NOT NULL,
  `gender` varchar(32) DEFAULT NULL,
  `age` int(12) DEFAULT NULL,
  `nick_name` varchar(32) DEFAULT NULL,
  `name` varchar(32) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

2.

Struktur pakej lengkap projek ditunjukkan dalam rajah

1 Import kebergantungan maven

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <mysql-connector-java.version>8.0.11</mysql-connector-java.version>
        <commons-lang3.version>3.7</commons-lang3.version>
        <fastjson.version>1.2.47</fastjson.version>
        <mybatis-plus-boot-starter.version>3.3.0</mybatis-plus-boot-starter.version>
        <mybatis-plus-generator.version>3.3.0</mybatis-plus-generator.version>
        <druid.version>1.1.14</druid.version>
        <lombok.version>1.18.0</lombok.version>
        <dubbo-spring-boot-starter.version>2.0.0</dubbo-spring-boot-starter.version>
        <swagger.version>2.9.2</swagger.version>
        <swagger-bootstrap-ui.version>1.9.6</swagger-bootstrap-ui.version>
    </properties>
 
    <dependencies>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.4</version>
        </dependency>
 
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
 
        <!--mysql依赖-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql-connector-java.version}</version>
        </dependency>
 
        <!--阿里巴巴fastjosn依赖-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>${fastjson.version}</version>
        </dependency>
 
        <!--阿里巴巴数据库连接池依赖-->
        <!-- Druid -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>${druid.version}</version>
        </dependency>
 
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.1</version>
        </dependency>
 
        <!-- MyBatis增强工具-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>${mybatis-plus-boot-starter.version}</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>${mybatis-plus-generator.version}</version>
        </dependency>
 
        <!-- lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${lombok.version}</version>
        </dependency>
 
        <!--swagger-ui-->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>${swagger.version}</version>
        </dependency>
 
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>${swagger.version}</version>
        </dependency>
 
        <dependency>
            <groupId>com.github.xiaoymin</groupId>
            <artifactId>swagger-bootstrap-ui</artifactId>
            <version>${swagger-bootstrap-ui.version}</version>
        </dependency>
 
    </dependencies>

2 .yml

server:
  port: 8083
logging:
  config: classpath:logback-spring.xml  #日志
spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://IP:3306/school?autoReconnect=true&useUnicode=true&characterEncoding=utf8&serverTimezone=GMT%2B8&useSSL=false
    username: root
    password: root
    druid:
      max-active: 100
      initial-size: 10
      max-wait: 60000
      min-idle: 5
  #设置单个文件最大上传大小
  servlet:
    multipart:
      max-file-size: 20MB
mybatis-plus:
  mapper-locations: classpath*:mapper/*.xml
  global-config:
    db-column-underline: true  #开启驼峰转换
    db-config:
      id-type: uuid
      field-strategy: not_null
    refresh: true
  configuration:
    map-underscore-to-camel-case: true
    #log-impl: org.apache.ibatis.logging.stdout.StdOutImpl #打印sql语句便于调试

3 Untuk memudahkan antara muka penyahpepijatan nanti, tambahkan konfigurasi kesombongan

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;
 
/**
 * swagger文档，项目启动后，浏览器访问:http://localhost:8083/swagger-ui.html
 */
@Configuration
@EnableSwagger2
public class ApiSwagger2 {
 
    @Bean
    public Docket createRestBmbsApi() {
        return new Docket(DocumentationType.SWAGGER_2)
                .groupName("users")
                .apiInfo(apiInfo())
                .select()
                .apis(RequestHandlerSelectors.basePackage("com.congge.controller"))
                .paths(PathSelectors.any())
                .build();
    }
 
    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("后端相关API")
                .version("1.0")
                .build();
    }
 
}

4 kelas entiti

import com.baomidou.mybatisplus.annotation.TableField;
import lombok.Data;
 
@Data
public class Student {
 
    @TableField("id")
    private String id;
 
    @TableField("name")
    private String name;
 
    @TableField("gender")
    private String gender;
 
    @TableField("age")
    private int age;
 
    @TableField("nick_name")
    private String nickName;
 
}

5 untuk menanyakan semua data

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.congge.entity.Student;
import org.apache.ibatis.annotations.Mapper;
 
import java.util.List;
 
@Mapper
public interface StudentMapper extends BaseMapper<Student> {
 
    List<Student> queryAll();
 
}

6 lapisan Mybatis, tulis fail SQL

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.congge.dao.StudentMapper">
 
    <select id="queryAll" resultType="com.congge.entity.Student">
		select * from student
	</select>
 
</mapper>

7 Kelas pelaksanaan perniagaan

Dalam pelaksanaan perniagaan ini, anda boleh menggunakan kaedah mybatis dan mybatis-. Selain itu, pilih berdasarkan keperluan anda sendiri apabila menggunakannya secara khusus;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.congge.dao.StudentMapper;
import com.congge.entity.Student;
import com.congge.service.StudentService;
import org.springframework.stereotype.Service;
 
import javax.annotation.Resource;
import java.util.List;
 
@Service
public class StudentServiceImpl implements StudentService {
 
    @Resource
    private StudentMapper studentMapper;
 
    @Override
    public List<Student> queryAllStudent() {
        QueryWrapper<Student> queryWrapper = new QueryWrapper();
        List<Student> students = studentMapper.selectList(queryWrapper);
        return students;
        //return studentMapper.queryAll();
    }
 
    @Override
    public List<Student> getByName(String name) {
        QueryWrapper<Student> queryWrapper = new QueryWrapper();
        queryWrapper.like("name",name);
        return studentMapper.selectList(queryWrapper);
    }
 
    public Student getById(String id) {
        QueryWrapper<Student> queryWrapper = new QueryWrapper();
        queryWrapper.like("id",id);
        return studentMapper.selectOne(queryWrapper);
    }
}

8 Tambah antara muka ujian

@RestController
public class StudentController {
 
    @Autowired
    private StudentService studentService;
 
    @GetMapping("/getAll")
    public List<Student> getAll(){
        return studentService.queryAllStudent();
    }
 
    @GetMapping("/getByName")
    public List<Student> getByName(@RequestParam String name){
        return studentService.getByName(name);
    }
 
    @GetMapping("/getById")
    public Student getById(@RequestParam String id){
        return studentService.getById(id);
    }
}

9 Mulakan kelas

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
 
@SpringBootApplication
public class App {
 
    public static void main(String[] args) {
        SpringApplication.run(App.class,args);
    }
 
}

Seterusnya, Jalankan projek dan uji

10. Selepas memulakan, buka antara muka sombong

Anda juga boleh menguji dua secara rawak Mari buat antara muka dan ujinya untuk mendapatkan antara muka data semua pelajar

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