在spring boot项目引入mybatis plus后的的案例实践

在Spring Boot项目中引入MyBatis Plus后，可以通过以下步骤进行配置和使用：

1. 在pom.xml中添加MyBatis Plus的依赖：

<dependencies>
    <!-- 其他依赖... -->
 
    <!-- MyBatis Plus -->
    <dependency>
        <groupId>com.baomidou</groupId>
        <artifactId>mybatis-plus-boot-starter</artifactId>
        <version>3.x.x</version> <!-- 替换为实际版本号 -->
    </dependency>
 
    <!-- 数据库驱动，以MySQL为例 -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.x.x</version> <!-- 替换为实际版本号 -->
    </dependency>
</dependencies>

2. 在application.properties或application.yml中配置数据库信息：

# application.properties 示例
spring.datasource.url=jdbc:mysql://localhost:3306/your_database?useSSL=false&useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=yourpassword
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

3. 创建实体类对应数据库表：

import com.baomidou.mybatisplus.annotation.TableName;
 
@TableName("user")
public class User {
    private Long id;
    private String name;
    private Integer age;
    private String email;
    
    // 省略getter和setter方法...
}

4. 创建Mapper接口：

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import org.apache.ibatis.annotations.Mapper;
 
@Mapper
public interface UserMapper extends BaseMapper<User> {
    // MyBatis Plus会自动处理CRUD操作
}

5. 使用MyBatis Plus提供的服务：

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
 
@Service
public class UserService {
 
    private final UserMapper userMapper;
 
    @Autowired
    public UserService(UserMapper userMapper) {
        this.userMapper = userMapper;
    }
 
    public boolean saveUser(User user) {
        return userMapper.insert(user) > 0;
    }
 
    // 更多业务方法...
}

6. 在Spring Boot启动类上添加@MapperScan注解，指定Mapper接口所在的包：

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
 
@SpringBootApplication
@MapperScan("com.yourpackage.mapper")
public class YourApplication {
    public static void main(String[] args) {
        SpringApplication.run(YourApplication.class, args);
    }
}

以上步骤展示了如何在Spring Boot项目中引入MyBati