使用idea搭建一个Git项目，技术使用maven、springboot、mybatis plus、redis等

1. 首先，在idea中创建一个新的maven项目，选择Spring Initializr模板，添加所需要的依赖：

- Spring Boot DevTools
- Spring Web
- MyBatis Plus
- Redis

2. 在pom.xml中添加如下配置：

<properties>
    <java.version>1.8</java.version>
    <mybatis-plus.version>3.4.2</mybatis-plus.version>
    <redisson.version>3.16.1</redisson.version>
</properties>

<dependencies>
    <!-- Spring Boot -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <optional>true</optional>
    </dependency>

    <!-- MyBatis Plus -->
    <dependency>
        <groupId>com.baomidou</groupId>
        <artifactId>mybatis-plus-boot-starter</artifactId>
        <version>${mybatis-plus.version}</version>
    </dependency>

    <!-- Redis -->
    <dependency>
        <groupId>org.redisson</groupId>
        <artifactId>redisson</artifactId>
        <version>${redisson.version}</version>
    </dependency>

    <!-- Junit -->
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

3. 在application.yml中添加如下配置：

server:
  port: 8080

spring:
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8&useSSL=false&serverTimezone=GMT%2B8
    username: root
    password: 123456
  redis:
    host: localhost
    port: 6379
    database: 0

4. 创建一个UserController，实现用户的增删改查功能：

@RestController
@RequestMapping("/user")
public class UserController {
    @Autowired
    private UserService userService;

    @PostMapping("/add")
    public boolean addUser(@RequestBody User user) {
        return userService.addUser(user);
    }

    @DeleteMapping("/delete/{id}")
    public boolean deleteUser(@PathVariable("id") Long id) {
        return userService.deleteUser(id);
    }

    @PutMapping("/update")
    public boolean updateUser(@RequestBody User user) {
        return userService.updateUser(user);
    }

    @GetMapping("/get/{id}")
    public User getUserById(@PathVariable("id") Long id) {
        return userService.getUserById(id);
    }

    @GetMapping("/list")
    public List<User> getUserList() {
        return userService.getUserList();
    }
}

5. 创建一个User实体类：

@Data
@AllArgsConstructor
@NoArgsConstructor
public class User {
    private Long id;
    private String name;
    private Integer age;
    private String email;
}

6. 创建一个UserService，定义用户的增删改查接口：

public interface UserService {
    boolean addUser(User user);
    boolean deleteUser(Long id);
    boolean updateUser(User user);
    User getUserById(Long id);
    List<User> getUserList();
}

7. 实现UserService接口，在其中使用MyBatis Plus操作数据库：

@Service
public class UserServiceImpl implements UserService {
    @Autowired
    private UserMapper userMapper;

    @Override
    public boolean addUser(User user) {
        return userMapper.insert(user) > 0;
    }

    @Override
    public boolean deleteUser(Long id) {
        return userMapper.deleteById(id) > 0;
    }

    @Override
    public boolean updateUser(User user) {
        return userMapper.updateById(user) > 0;
    }

    @Override
    public User getUserById(Long id) {
        return userMapper.selectById(id);
    }

    @Override
    public List<User> getUserList() {
        return userMapper.selectList(null);
    }
}

8. 创建一个UserMapper接口，继承BaseMapper<User>，使用MyBatis Plus操作数据库：

@Mapper
@Repository
public interface UserMapper extends BaseMapper<User> {
}

9. 在启动类中添加@EnableCaching注解，开启缓存：

@SpringBootApplication
@EnableCaching
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

10. 在UserService中使用Redis缓存，优化数据库操作：

@Service
public class UserServiceImpl implements UserService {
    @Autowired
    private UserMapper userMapper;

    @Autowired
    private RedissonClient redissonClient;

    @Override
    @Cacheable(value = "userCache", key = "#user.id")
    public boolean addUser(User user) {
        return userMapper.insert(user) > 0;
    }

    @Override
    @CacheEvict(value = "userCache", key = "#id")
    public boolean deleteUser(Long id) {
        return userMapper.deleteById(id) > 0;
    }

    @Override
    @CachePut(value = "userCache", key = "#user.id")
    public boolean updateUser(User user) {
        return userMapper.updateById(user) > 0;
    }

    @Override
    @Cacheable(value = "userCache", key = "#id")
    public User getUserById(Long id) {
        RBucket<User> userBucket = redissonClient.getBucket("user:" + id);
        User user = userBucket.get();
        if (user == null) {
            user = userMapper.selectById(id);
            userBucket.set(user);
        }
        return user;
    }

    @Override
    @Cacheable(value = "userCache")
    public List<User> getUserList() {
        return userMapper.selectList(null);
    }
}

以上就是使用idea搭建一个Git项目，技术使用maven、springboot、mybatis plus、redis等的详细步骤。