本文主要關(guān)注如何使用mybatis/mybatis plus連接SQL Server數(shù)據(jù)庫，因此將省略其他項目配置、代碼。

應用框架：spring bootORM框架：mybatis plus（對于連接數(shù)據(jù)庫而言，mybatis和mybatis plus其實都一樣）數(shù)據(jù)庫連接池：druid

此處僅給出我的配置，mybatis/druid請依據(jù)自己項目的需要進行選擇。方便起見我用的是mybatis plus

<!--mybatis plus --> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.1.0</version> </dependency><dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-core</artifactId> <version>1.3.7</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.0</version> </dependency> <!-- druid 連接池 --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.12</version> </dependency> <!--for SqlServer--> <dependency> <groupId>com.microsoft.sqlserver</groupId> <artifactId>sqljdbc4</artifactId> <version>4.0</version> </dependency>配置數(shù)據(jù)源

添加數(shù)據(jù)庫配置

YAML文件中添加自己數(shù)據(jù)庫的地址

# SQL Server數(shù)據(jù)庫spring.datasource.xx.url: jdbc:sqlserver://你的數(shù)據(jù)庫地址:1433;databaseName=你的數(shù)據(jù)庫名稱spring.datasource.xx.username: xxxxspring.datasource.xx.password: xxxxspring.datasource.xx.driver-class-name: com.microsoft.sqlserver.jdbc.SQLServerDriver添加數(shù)據(jù)源

此處和平時我們在spring boot中集成mybatis/mybatis plus一樣，添加bean即可。由于平時經(jīng)常用到多個數(shù)據(jù)庫，此處展示一個多數(shù)據(jù)源的例子：一個是mysql，一個是SQL Server有關(guān)mybatis plus配置數(shù)據(jù)源的注意事項，比如配置mapper文件夾等，請自行問度娘，此處不再一一指出。注意：下面代碼來自實際代碼，但批量刪除了敏感信息、重新命名，因而可能存在與前面配置信息不一致的地方，僅僅是一個示例

mysql數(shù)據(jù)源配置，注意，由于是多數(shù)據(jù)源，需要有一個數(shù)據(jù)源配置中加上@Primary注解

@Configuration@MapperScan(basePackages = 'com.xxx.mapper', sqlSessionFactoryRef = 'mysqlSqlSessionFactory')public class MySQLMybatisPlusConfig { @Autowired private MybatisPlusProperties properties; @Autowired private ResourceLoader resourceLoader = new DefaultResourceLoader(); @Autowired(required = false) private Interceptor[] interceptors; @Autowired(required = false) private DatabaseIdProvider databaseIdProvider; @Autowired private Environment env; @Bean(name = 'mysqlDataSource') @Primary public DataSource getRecruitDataSource() throws Exception { Properties props = new Properties(); props.put('driverClassName', env.getProperty('spring.datasource.mysqlData.driver-class-name')); props.put('url', env.getProperty('spring.datasource.mysqlData.url')); props.put('username', env.getProperty('spring.datasource.mysqlData.username')); props.put('password', env.getProperty('spring.datasource.mysqlData.password')); return DruidDataSourceFactory.createDataSource(props); } /** * mybatis-plus分頁插件 */ @Bean public PaginationInterceptor paginationInterceptor() { PaginationInterceptor page = new PaginationInterceptor(); page.setDialectType('mysql'); return page; } @Bean(name = 'mysqlSqlSessionFactory') @Primary public MybatisSqlSessionFactoryBean mybatisSqlSessionFactoryBean(@Qualifier('mysqlDataSource') DataSource mysqlDataSource) throws IOException { MybatisSqlSessionFactoryBean mybatisPlus = new MybatisSqlSessionFactoryBean(); try { mybatisPlus.setDataSource(mysqlDataSource); } catch (Exception e) { e.printStackTrace(); } mybatisPlus.setVfs(SpringBootVFS.class); // 設(shè)置分頁插件 MybatisConfiguration mc = new MybatisConfiguration(); mc.setDefaultScriptingLanguage(MybatisXMLLanguageDriver.class); mc.setMapUnderscoreToCamelCase(true);// 數(shù)據(jù)庫和java都是駝峰，就不需要 mybatisPlus.setConfiguration(mc); if (this.databaseIdProvider != null) { mybatisPlus.setDatabaseIdProvider(this.databaseIdProvider); } mybatisPlus.setTypeAliasesPackage('com.xxx.mysql.bean.model'); mybatisPlus.setTypeHandlersPackage(this.properties.getTypeHandlersPackage()); mybatisPlus.setMapperLocations(this.properties.resolveMapperLocations()); // 設(shè)置mapper.xml文件的路徑 ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver(); Resource[] resource = resolver.getResources('classpath:mapper/*.xml'); mybatisPlus.setMapperLocations(resource); return mybatisPlus; }}

SQL Server數(shù)據(jù)源

@Configuration@MapperScan(basePackages = 'com.xxx.survey.mapper', sqlSessionFactoryRef = 'xxSqlSessionFactory')public class SqlServerMybatisConfig { @Autowired private MybatisPlusProperties properties; @Autowired private ResourceLoader resourceLoader = new DefaultResourceLoader(); @Autowired(required = false) private Interceptor[] interceptors; @Autowired(required = false) private DatabaseIdProvider databaseIdProvider; @Autowired private Environment env; @Bean(name = 'xxDataSource') public DataSource getAttendanceDataSource() throws Exception { Properties props = new Properties(); props.put('driverClassName', env.getProperty('spring.datasource.xx.driver-class-name')); props.put('url', env.getProperty('spring.datasource.xx.url')); props.put('username', env.getProperty('spring.datasource.xx.username')); props.put('password', env.getProperty('spring.datasource.xx.password')); return DruidDataSourceFactory.createDataSource(props); } @Bean(name = 'xxSqlSessionFactory') public MybatisSqlSessionFactoryBean mybatisSqlSessionFactoryBean(@Qualifier('xxDataSource') DataSource xxDataSource) throws IOException { MybatisSqlSessionFactoryBean mybatisPlus = new MybatisSqlSessionFactoryBean(); try { mybatisPlus.setDataSource(xxDataSource); } catch (Exception e) { e.printStackTrace(); } mybatisPlus.setVfs(SpringBootVFS.class); // 設(shè)置分頁插件 MybatisConfiguration mc = new MybatisConfiguration(); mc.setDefaultScriptingLanguage(MybatisXMLLanguageDriver.class); mc.setMapUnderscoreToCamelCase(true);// 數(shù)據(jù)庫和java都是駝峰，就不需要 mybatisPlus.setConfiguration(mc); if (this.databaseIdProvider != null) { mybatisPlus.setDatabaseIdProvider(this.databaseIdProvider); } mybatisPlus.setTypeAliasesPackage('com.xxx.survey.bean.model'); mybatisPlus.setTypeHandlersPackage(this.properties.getTypeHandlersPackage()); mybatisPlus.setMapperLocations(this.properties.resolveMapperLocations()); // 設(shè)置mapper.xml文件的路徑 ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver(); Resource[] resource = resolver.getResources('classpath:mapper/*.xml'); mybatisPlus.setMapperLocations(resource); return mybatisPlus; }}生成ORM代碼

到這里，程序啟動應該沒什么問題，接著就應該生成DAO層、Service層代碼了mybatis和mybatis plus在此處按照和連接mysql時一樣的方法，根據(jù)需要寫代碼即可。比如對于mybatis plus，需要寫3處代碼：

實體bean，可以利用Spring Boot Code Generator!來根據(jù)SQL表結(jié)構(gòu)自動生成

Mapper代碼：都有模板，mybatis plus自己封裝的方法已經(jīng)很夠用，有單獨需求可以自己寫xml來自定義SQL

@Mapperpublic interface XXXMapper extends BaseMapper<XXX> {}

Service代碼好像也有現(xiàn)成的工具可以自動生成mapper service代碼來著。Service接口

public interface XXXService extends IService<XXX> {}

ServiceImpl

@Servicepublic class XXXServiceImpl extends ServiceImpl<XXXMapper, XXX> implements XXXService {}參考資料

Spring Boot 集成 MyBatis和 SQL Server實踐springboo-mybatis SQL Server

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