Flyway数据迁移工具使用和安装

以前生产环境数据库增加字段是写一个sql放入本地，到时候部署生产环境的时候先手动执行sql，在部署项目。Flyway数据迁移工具主要是用来控制数据库增删改的版本控制，类似于git,可是相比git代码管理，他的版本控制是通过数据库当中的flyway_schema_history来控制的，这样每次部署生产环境的时候就不需要人工再去执行sql，部署项目的时候sql会自动执行。

先新建一个springboot项目
pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.flywaydb</groupId>
    <artifactId>flywaydb</artifactId>
    <version>1.0-SNAPSHOT</version>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.11.RELEASE</version>
        <relativePath/> <!-- lookup parent from dao -->
    </parent>
    <dependencies>
        <!-- SpringBoot-整合Web组件 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.15</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.flywaydb</groupId>
            <artifactId>flyway-core</artifactId>
            <version>5.2.4</version>
        </dependency>
        <dependency>
            <groupId>org.flywaydb</groupId>
            <artifactId>flyway-core</artifactId>
        </dependency>
    </dependencies>
</project>

application.yml配置

server:
  port: 8091
spring:
  datasource:
    url: jdbc:mysql://127.0.0.1:3306/springboot?useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=true&rewriteBatchedStatements=true&useSSL=false&serverTimezone=GMT%2B8
    username: root
    password: root
  flyway:
    enabled: true
    # 禁止清理数据库表
    clean-disabled: true
    # 如果数据库不是空表，需要设置成 true，否则启动报错
    baseline-on-migrate: true
    # 与 baseline-on-migrate: true 搭配使用
    baseline-version: 0
    locations:
      - classpath:db/migration/mysql  #（根据个人情况设置）

再resource新建db.migration.mysql
然后创建两个文件,文件名为:版本号增删改查(Add,Create,update)表名.sql
V1__Create_test111_table.sql

create table test111 (
    ID int not null,
    NAME varchar(100) not null
);

V2__Add_test111.sql

insert into test111 (ID, NAME) values (1, 'Axel');
insert into test111 (ID, NAME) values (2, 'Mr. Foo');
insert into test111 (ID, NAME) values (3, 'Ms. Bar');

然后运行springboot项目，如果能正常启动，可以在mysql中看到以下两张表

image.png