# mapstruct

**Repository Path**: lxjblog/mapstruct

## Basic Information

- **Project Name**: mapstruct
- **Description**: mapstruct 类型转换
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2024-02-01
- **Last Updated**: 2024-07-28

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

## MapStruct
> 用于将 PO、VO、DTO 各种实体类之间的相互转换

1、引入依赖
```xml
<dependency>
    <groupId>org.mapstruct</groupId>
    <artifactId>mapstruct</artifactId>
    <version>${mapstruct.version}</version>
</dependency>

<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>${lombok.version}</version>
</dependency>
```
2、创建接口基本接口
```java
public interface DtoPoMapStruct<DTO, PO> {
    PO toPo(DTO var1);

    DTO toDto(PO var1);

    List<PO> toPo(List<DTO> var1);

    List<DTO> toDto(List<PO> var1);
}
```
3、创建接口并添加注解，model 选择 spring 的方式，这个会生成一个 spring 的 bean，方便后续使用
```java
@Mapper(componentModel = "spring")
public interface UserDtoPoMapStruct extends DtoPoMapStruct<UserDto, User> {
}
```
4、配置 pom.xml 打包
```xml
<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.11.0</version>
    <configuration>
        <source>1.8</source>
        <target>1.8</target>
        <annotationProcessorPaths>
            <path>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>${lombok.version}</version>
            </path>
            <path>
                <groupId>org.mapstruct</groupId>
                <artifactId>mapstruct-processor</artifactId>
                <version>${mapstruct.version}</version>
            </path>
        </annotationProcessorPaths>
    </configuration>
</plugin>
```
5、启动项目即可自动生成对应的 mapStruct 实现类了
![img.png](img.png)
6、使用的时候将这个实现类依赖注入就可以了

## mybatis自动创建表
> 通过在实体类上添加注解，自动生成和修改数据库中对应的表

1、引入依赖
```xml
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.5.4</version>
</dependency>

<dependency>
    <groupId>com.gitee.sunchenbin.mybatis.actable</groupId>
    <artifactId>mybatis-enhance-actable</artifactId>
    <version>1.5.0.RELEASE</version>
    <exclusions>
        <exclusion>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-annotation</artifactId>
        </exclusion>
    </exclusions>
</dependency>

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
</dependency>
```
2、修改 application.yml 配置
```yaml
# 配置数据库连接信息
spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/admin_sys?characterEncoding=UTF8&serverTimezone=Asia/Shanghai&useSSL=false&allowPublicKeyRetrieval=true
    username: root
    password: 123456

# 配置 mapper.xml 的扫描路径，这里需要直接指定以下内容
mybatis-plus:
  mapper-locations: classpath*:com/gitee/sunchenbin/mybatis/actable/mapping/*/*.xml

# 建表基本配置
actable:
  table:
    auto: update
  model:
    pack: com.example.mapstruct_test.entity
  database:
    type: mysql
```
3、修改启动类，添加扫描路径
```java
@SpringBootApplication(scanBasePackages = {"com.gitee.sunchenbin.mybatis.actable.manager.*"})
@MapperScan(basePackages = {"com.gitee.sunchenbin.mybatis.actable.dao.*"})
public class MapstructTestApplication {
    public static void main(String[] args) {
        SpringApplication.run(MapstructTestApplication.class, args);
    }
}
```
4、在实体类上添加注解
```java
@Data
@TableName("test_user")
@Table(comment = "测试表")
public class User {
    @TableId
    @Column(comment = "id", isNull = false)
    private Integer id;
    @Column(comment = "userName", isNull = false)
    private String userName;
    @Column(comment = "age", isNull = false)
    private Integer age;
    @Column(comment = "address", isNull = false)
    private String address;
    @Column(comment = "delFlg", isNull = false)
    private Integer delFlg;
}
```
5、启动项目即可看到对应的输出日志和表
![img_1.png](img_1.png)
![img_2.png](img_2.png)