用springboot 同步mysql 和SQL server两个数据库的代码可以写给我吗

以下是使用Spring Boot同步MySQL和SQL Server数据库的代码示例：

首先，我们需要在pom.xml文件中添加相应的依赖：

<dependencies>
    <!-- MySQL Connector -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.26</version>
    </dependency>

    <!-- SQL Server Connector -->
    <dependency>
        <groupId>com.microsoft.sqlserver</groupId>
        <artifactId>mssql-jdbc</artifactId>
        <version>9.4.0.jre11</version>
    </dependency>

    <!-- Spring Boot Starter JDBC -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jdbc</artifactId>
        <version>2.5.5</version>
    </dependency>
</dependencies>

接下来，我们需要在application.properties文件中配置MySQL和SQL Server数据库的连接信息：

# MySQL database connection settings
spring.datasource.url=jdbc:mysql://localhost:3306/mysql_db
spring.datasource.username=root
spring.datasource.password=root

# SQL Server database connection settings
spring.sqlserver.datasource.url=jdbc:sqlserver://localhost:1433;databaseName=sqlserver_db
spring.sqlserver.datasource.username=sa
spring.sqlserver.datasource.password=sa

然后，我们需要编写一个同步服务的类，该类将从MySQL数据库中获取数据并将其同步到SQL Server数据库中：

@Service
public class DataSyncService {

    @Autowired
    private JdbcTemplate mysqlJdbcTemplate;

    @Autowired
    @Qualifier("sqlServerJdbcTemplate")
    private JdbcTemplate sqlServerJdbcTemplate;

    public void syncData() {
        // Retrieve data from MySQL database
        List<Map<String, Object>> data = mysqlJdbcTemplate.queryForList("SELECT * FROM users");

        // Insert data into SQL Server database
        for (Map<String, Object> row : data) {
            sqlServerJdbcTemplate.update("INSERT INTO users (id, name, email) VALUES (?, ?, ?)",
                    row.get("id"), row.get("name"), row.get("email"));
        }
    }
}

最后，我们需要在应用程序的主类中创建两个JdbcTemplate实例并将它们注入到DataSyncService中：

@SpringBootApplication
public class Application {

    @Autowired
    private DataSource mysqlDataSource;

    @Value("${spring.sqlserver.datasource.url}")
    private String sqlServerUrl;

    @Value("${spring.sqlserver.datasource.username}")
    private String sqlServerUsername;

    @Value("${spring.sqlserver.datasource.password}")
    private String sqlServerPassword;

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

    @Bean
    public JdbcTemplate mysqlJdbcTemplate() {
        return new JdbcTemplate(mysqlDataSource);
    }

    @Bean(name = "sqlServerJdbcTemplate")
    public JdbcTemplate sqlServerJdbcTemplate() {
        return new JdbcTemplate(sqlServerDataSource());
    }

    private DataSource sqlServerDataSource() {
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
        dataSource.setUrl(sqlServerUrl);
        dataSource.setUsername(sqlServerUsername);
        dataSource.setPassword(sqlServerPassword);
        return dataSource;
    }
}

现在，我们可以在任何需要同步数据的地方调用DataSyncService的syncData()方法来同步MySQL和SQL Server数据库中的数据了。