1、启动时migration，在 dependencies 增加 flyway

        <!-- https://mvnrepository.com/artifact/com.google.guava/guava -->
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>30.1-jre</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.baomidou/mybatis-plus-boot-starter -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>${mybatis-plus.version}</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.flywaydb/flyway-core -->
        <dependency>
            <groupId>org.flywaydb</groupId>
            <artifactId>flyway-core</artifactId>
            <version>${flyway.version}</version>
        </dependency>

启动Application

2、mvn 构建时 migration，增加 flyway plugin

   <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>${spring-boot.version}</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>${java.version}</source>
                    <target>${java.version}</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <!-- https://mvnrepository.com/artifact/org.flywaydb/flyway-maven-plugin -->
            <plugin>
                <groupId>org.flywaydb</groupId>
                <artifactId>flyway-maven-plugin</artifactId>
                <version>${flyway.version}</version>
                <configuration>
                    <url><![CDATA[jdbc:mysql://xxxx:3308/shardingjdbc?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=CONVERT_TO_NULL&useSSL=false&serverTimezone=GMT%2B8]]></url>
                    <user>base_sa</user>
                    <password>base_sa</password>
                </configuration>
                <dependencies>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>${mysql.version}</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>





mvn flyway:migrate

3、migration文件

文件目录在 resources 下

内容如下：

V1.0
DROP TABLE IF EXISTS t_base_user;
-- auto-generated definition
CREATE TABLE t_base_user
(
    id          INT AUTO_INCREMENT PRIMARY KEY,
    user_name   VARCHAR(50) NULL COMMENT '姓名',
    create_time DATETIME    NULL COMMENT '创建时间'
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;



V2.0
alter table t_base_user add column description varchar(255) default null;


V3.0
alter table t_base_user add column nick_name varchar(50) default null;

migration完成后，在数据库中会发现配置表多了一条。

打开具体表，看到增加的字段情况