SpringBoot+SQLite+MyBatis-Plus简单搭建案例

 SpringBoot+SQLite+MyBatis-Plus简单搭建案例

工具：IDEA、Navicat

涉及： SpringBoot、SQLite、MyBatis-Plus、fastjson

1、使用IDEA创建SpringBoot项目。打开pom.xml文件。添加依赖支持。

　　　　 <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </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>3.4.1</version>
        </dependency>

        <!--SQLite-->
        <dependency>
            <groupId>org.xerial</groupId>
            <artifactId>sqlite-jdbc</artifactId>
            <version>3.21.0.1</version>
        </dependency>

        <!--JSON-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.73</version>
        </dependency>

2、配置application.yml

server:
  port: 920

#数据库配置
spring:
  datasource:
    driver-class-name: org.sqlite.JDBC
    url: jdbc:sqlite:F:\\demo.db
    #username:
    #password:

#控制台打印SQL语句
mybatis-plus:
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

3、创建User实体类

package com.example.sbmpsqlite.entity;

import com.baomidou.mybatisplus.annotation.TableField;
import com.baomidou.mybatisplus.annotation.TableName;


@TableName("user")
public class User {

    @TableField("id")
    private String id;

    @TableField("name")
    private String name;

    @TableField("age")
    private Integer age;

    @TableField("sex")
    private String sex;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }
}

4、创建UserMapper，添加@Mapper注解，声明Mapper。

package com.example.sbmpsqlite.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.example.sbmpsqlite.entity.User;
import org.apache.ibatis.annotations.Mapper;


@Mapper
public interface UserMapper extends BaseMapper<User> {

}

5、创建UserService

package com.example.sbmpsqlite.service;

import com.baomidou.mybatisplus.extension.service.IService;
import com.example.sbmpsqlite.entity.User;


public interface UserService extends IService<User> {

}

6、创建UserServiceImpl

package com.example.sbmpsqlite.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.example.sbmpsqlite.entity.User;
import com.example.sbmpsqlite.mapper.UserMapper;
import com.example.sbmpsqlite.service.UserService;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;


@Service
@Transactional(rollbackFor = Exception.class)
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {

}

7、创建UserController

package com.example.sbmpsqlite.controller;

import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.example.sbmpsqlite.entity.User;
import com.example.sbmpsqlite.service.UserService;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import java.util.List;
import java.util.UUID;


@RestController
@RequestMapping("/user")
public class UserController {

    @Resource
    private UserService userService;

    /**
     * 查询全部
     * @return
     */
    @GetMapping("/getListUser")
    public List<User> getListUser() {
        List<User> list = userService.list();
        return list;
    }

    /**
     * 新增
     *
     * @return
     */
    @GetMapping("/getSaveUser")
    public Object getSaveUser() {
        User user = user();
        boolean save = userService.save(user);
        if (save) {
            return "新增成功！！！";
        }
        return null;
    }

    public User user() {
        User user = new User();
        user.setId(UUID.randomUUID().toString().substring(0, 10));
        user.setName("李某某");
        user.setAge(21);
        user.setSex("女");
        return user;
    }

    /**
     * 单个查询
     * 单个修改
     * 单个删除
     * @return
     */
    @GetMapping("/getOneUser")
    public Object getOneUser() {
        QueryWrapper queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("name", "李某某");
        //遍历打印至控制台,以JSON的格式
        List<User> list = userService.list(queryWrapper);
        list.forEach(item -> {
            System.out.println(JSON.toJSONString(list.get(0)));
            String id = list.get(0).getId();
            //修改
            User user = user1();
            user.setId(id);
            boolean b = userService.updateById(user);
            if (b) {
                System.out.println("修改成功,ID为:" + id);
            } else {
                System.out.println("修改失败,ID为:" + id);
            }
            //删除
            boolean b1 = userService.removeById(id);
            if (b1) {
                System.out.println("删除成功,ID为:" + id);
            } else {
                System.out.println("删除失败,ID为:" + id);
            }
        });
        return list;
    }

    public User user1() {
        User user = new User();
        user.setName("李某某");
        user.setAge(26);
        user.setSex("女");
        return user;
    }

}

8、修改启动类

package com.example.sbmpsqlite;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.core.env.Environment;

@SpringBootApplication
@MapperScan("com.example.sbmpsqlite.mapper")
public class SbmpsqliteApplication {

    public static void main(String[] args) {
        ConfigurableApplicationContext context = SpringApplication.run(SbmpsqliteApplication.class, args);
        Environment bean = context.getBean(Environment.class);
        System.out.println("---启动完成,当前使用端口:[" + bean.getProperty("local.server.port") + "]---");
    }

}

9、结果展示

 

 亲试可用。到这里，已经完成了对SqLite数据库的操作！