Steps and example code for using myBatisPlus in springBoot

MyBatis-Plus is an enhancement tool for MyBatis. Using it in Spring Boot projects can greatly improve development efficiency. The following is a detailed introduction to the steps and sample code for using MyBatis-Plus in Spring Boot.

1. Create a Spring Boot project

You can create a new Spring Boot project with Spring Initializr(/) and add the following dependencies:

Spring Web
Spring Data JPA (although using MyBatis-Plus, this dependency can be added as needed)
MyBatis Framework
MySQL Driver (assuming a MySQL database)

2. Add MyBatis-Plus dependency

existAdd MyBatis-Plus dependencies:

<dependency>
    <groupId></groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.5.3.1</version>
</dependency>

3. Configure database connections

existorConfigure database connection information:

=jdbc:mysql://localhost:3306/your_database_name
=your_username
=your_password
-class-name=

4. Create entity class

Create a simple entity class, e.g.User：

import ;
import ;
@TableName("user")
public class User {
    @TableId
    private Long id;
    private String name;
    private Integer age;
    // Getters and Setters
    public Long getId() {
        return id;
    }
    public void setId(Long id) {
         = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
         = name;
    }
    public Integer getAge() {
        return age;
    }
    public void setAge(Integer age) {
         = age;
    }
}

5. Create a Mapper interface

Create an inherited fromBaseMapperMapper interface:

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

6. Create a Service Layer

Create a Service interface and its implementation class:

import ;
public interface UserService {
    List<User> getAllUsers();
    User getUserById(Long id);
    boolean saveUser(User user);
    boolean updateUser(User user);
    boolean deleteUser(Long id);
}

import ;
import ;
import ;
import ;
@Service
public class UserServiceImpl implements UserService {
    @Autowired
    private UserMapper userMapper;
    @Override
    public List<User> getAllUsers() {
        return (null);
    }
    @Override
    public User getUserById(Long id) {
        return (id);
    }
    @Override
    public boolean saveUser(User user) {
        return (user) > 0;
    }
    @Override
    public boolean updateUser(User user) {
        return (user) > 0;
    }
    @Override
    public boolean deleteUser(Long id) {
        return (id) > 0;
    }
}

7. Create Controller Layer

Create a Controller to handle HTTP requests:

import ;
import .*;
import ;
@RestController
@RequestMapping("/users")
public class UserController {
    @Autowired
    private UserService userService;
    @GetMapping
    public List<User> getAllUsers() {
        return ();
    }
    @GetMapping("/{id}")
    public User getUserById(@PathVariable Long id) {
        return (id);
    }
    @PostMapping
    public boolean saveUser(@RequestBody User user) {
        return (user);
    }
    @PutMapping
    public boolean updateUser(@RequestBody User user) {
        return (user);
    }
    @DeleteMapping("/{id}")
    public boolean deleteUser(@PathVariable Long id) {
        return (id);
    }
}

8. Launch the application

After starting the Spring Boot application, you can operate through the following APIUserdata:

GET /users: Obtain all user information.
GET /users/{id}: Obtain user information based on ID.
POST /users: Added new users.
PUT /users: Update user information.
DELETE /users/{id}: Delete the user according to the ID.

Follow the above steps and you can use MyBatis-Plus to perform database operations in your Spring Boot project.

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