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今天就跟大家聊聊有关Spring Boot 中怎么配置MyBatis多数据源,可能很多人都不太了解,为了让大家更加了解,小编给大家总结了以下内容,希望大家根据这篇文章可以有所收获。
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创建数据库 db_test
SET NAMES utf8mb4; SET FOREIGN_KEY_CHECKS = 0; -- ---------------------------- -- Table structure for t_user -- ---------------------------- DROP TABLE IF EXISTS `t_user`; CREATE TABLE `t_user` ( `id` int(8) NOT NULL AUTO_INCREMENT COMMENT 'ID', `user_name` varchar(20) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL COMMENT '用户姓名', `user_sex` char(1) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL COMMENT '用户性别', PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=23 DEFAULT CHARSET=utf8; -- ---------------------------- -- Records of t_user -- ---------------------------- BEGIN; INSERT INTO `t_user` VALUES (1, '刘备', '男'); INSERT INTO `t_user` VALUES (2, '孙尚香', '女'); INSERT INTO `t_user` VALUES (3, '周瑜', '男'); INSERT INTO `t_user` VALUES (4, '小乔', '女'); INSERT INTO `t_user` VALUES (5, '诸葛亮', '男'); INSERT INTO `t_user` VALUES (6, '黄月英', '女'); INSERT INTO `t_user` VALUES (7, '关羽', '男'); INSERT INTO `t_user` VALUES (8, '张飞', '男'); INSERT INTO `t_user` VALUES (9, '赵云', '男'); INSERT INTO `t_user` VALUES (10, '黄总', '男'); INSERT INTO `t_user` VALUES (11, '曹操', '男'); INSERT INTO `t_user` VALUES (12, '司马懿', '男'); INSERT INTO `t_user` VALUES (13, '貂蝉', '女'); INSERT INTO `t_user` VALUES (14, '吕布', '男'); INSERT INTO `t_user` VALUES (15, '马超', '男'); INSERT INTO `t_user` VALUES (16, '魏延', '男'); INSERT INTO `t_user` VALUES (17, '孟获', '男'); INSERT INTO `t_user` VALUES (18, '大乔', '女'); INSERT INTO `t_user` VALUES (19, '刘婵', '男'); INSERT INTO `t_user` VALUES (20, '姜维', '男'); INSERT INTO `t_user` VALUES (21, '廖化', '男'); INSERT INTO `t_user` VALUES (22, '关平', '男'); COMMIT; SET FOREIGN_KEY_CHECKS = 1;
dbb_test2
SET NAMES utf8mb4; SET FOREIGN_KEY_CHECKS = 0; -- ---------------------------- -- Table structure for t_hero -- ---------------------------- DROP TABLE IF EXISTS `t_hero`; CREATE TABLE `t_hero` ( `id` int(11) NOT NULL AUTO_INCREMENT COMMENT 'ID', `hero_code` varchar(32) DEFAULT NULL COMMENT '英雄编码', `hero_name` varchar(20) DEFAULT NULL COMMENT '英雄名称', PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8; -- ---------------------------- -- Records of t_hero -- ---------------------------- BEGIN; INSERT INTO `t_hero` VALUES (1, '001', '德玛西亚'); COMMIT; SET FOREIGN_KEY_CHECKS = 1;
构建项目,项目目录结构
4.0.0 org.springframework.boot spring-boot-starter-parent 2.1.9.RELEASE cn.zwqh spring-boot-mybatis-mulidatasource 0.0.1-SNAPSHOT spring-boot-mybatis-mulidatasource spring-boot-mybatis-mulidatasource 1.8 org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-test test org.springframework.boot spring-boot-starter-jdbc org.springframework.boot spring-boot-devtools true mysql mysql-connector-java runtime org.mybatis.spring.boot mybatis-spring-boot-starter 2.1.0 com.alibaba druid-spring-boot-starter 1.1.20 com.github.pagehelper pagehelper-spring-boot-starter 1.2.12 org.springframework.boot spring-boot-maven-plugin
这里使用了alibaba的druid数据库连接池,Druid 能够提供强大的监控和扩展功能。这里我们暂时只做简单的应用。
#master 数据源配置 master.datasource.driver-class-name=com.mysql.cj.jdbc.Driver master.datasource.url=jdbc:mysql://127.0.0.1:3306/db_test?useUnicode=true&characterEncoding=UTF-8&useSSL=true master.datasource.username=root master.datasource.password=zwqh@0258 #slave 数据源配置 slave.datasource.driver-class-name=com.mysql.cj.jdbc.Driver slave.datasource.url=jdbc:mysql://127.0.0.1:3306/db_test2?useUnicode=true&characterEncoding=UTF-8&useSSL=true slave.datasource.username=root slave.datasource.password=zwqh@0258 #mybatis mybatis.mapper-locations=classpath:/mapper/**/*Mapper.xml
MasterDataSourceConfig 对应数据库 db_test
@Configuration @MapperScan(basePackages = "cn.zwqh.springboot.dao.master", sqlSessionFactoryRef = "masterSqlSessionFactory") public class MasterDataSourceConfig { @Value("${master.datasource.driver-class-name}") private String driverClassName; @Value("${master.datasource.url}") private String url; @Value("${master.datasource.username}") private String username; @Value("${master.datasource.password}") private String password; @Bean(name = "masterDataSource") @Primary public DataSource dataSource() { DruidDataSource dataSource = new DruidDataSource(); dataSource.setDriverClassName(this.driverClassName); dataSource.setUrl(this.url); dataSource.setUsername(this.username); dataSource.setPassword(this.password); return dataSource; } @Bean(name = "masterSqlSessionFactory") @Primary public SqlSessionFactory sqlSessionFactory(@Qualifier("masterDataSource") DataSource dataSource) throws Exception { SqlSessionFactoryBean bean = new SqlSessionFactoryBean(); bean.setDataSource(dataSource); bean.setMapperLocations( new PathMatchingResourcePatternResolver().getResources("classpath*:/mapper/master/*Mapper.xml")); return bean.getObject(); } @Bean(name = "masterTransactionManager") @Primary public DataSourceTransactionManager transactionManager(@Qualifier("masterDataSource") DataSource dataSource) { return new DataSourceTransactionManager(dataSource); } @Bean(name = "masterSqlSessionTemplate") @Primary public SqlSessionTemplate testSqlSessionTemplate( @Qualifier("masterSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception { return new SqlSessionTemplate(sqlSessionFactory); } }
SlaveDataSourceConfig 对应数据库 db_test2
@Configuration @MapperScan(basePackages = "cn.zwqh.springboot.dao.slave", sqlSessionFactoryRef = "slaveSqlSessionFactory") public class SlaveDataSourceConfig { @Value("${slave.datasource.driver-class-name}") private String driverClassName; @Value("${slave.datasource.url}") private String url; @Value("${slave.datasource.username}") private String username; @Value("${slave.datasource.password}") private String password; @Bean(name = "slaveDataSource") public DataSource dataSource() { DruidDataSource dataSource = new DruidDataSource(); dataSource.setDriverClassName(this.driverClassName); dataSource.setUrl(this.url); dataSource.setUsername(this.username); dataSource.setPassword(this.password); return dataSource; } @Bean(name = "slaveSqlSessionFactory") public SqlSessionFactory sqlSessionFactory(@Qualifier("slaveDataSource") DataSource dataSource) throws Exception { SqlSessionFactoryBean bean = new SqlSessionFactoryBean(); bean.setDataSource(dataSource); bean.setMapperLocations( new PathMatchingResourcePatternResolver().getResources("classpath*:/mapper/slave/*Mapper.xml")); return bean.getObject(); } @Bean(name = "slaveTransactionManager") public DataSourceTransactionManager transactionManager(@Qualifier("slaveDataSource") DataSource dataSource) { return new DataSourceTransactionManager(dataSource); } @Bean(name = "slaveSqlSessionTemplate") public SqlSessionTemplate testSqlSessionTemplate( @Qualifier("masterSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception { return new SqlSessionTemplate(sqlSessionFactory); } }
多个数据源在使用的过程中必须指定主库,不然会报错。 @MapperScan(basePackages = "cn.zwqh.springboot.dao.slave") 指定对应 Dao 层的扫描路径。
db_test 数据库的 dao 层在 cn.zwqh.springboot.dao.master
包下,db_test2 数据库的 dao 层在 cn.zwqh.springboot.dao.slave
包下。
UserDao
public interface UserDao { ListgetAll(); }
HeroDao
public interface HeroDao { ListgetAllHero(); }
db_test 数据库的 xml 层在 /mapper/master/ 文件路径下,db_test2 数据库的 xml 层在 /mapper/slave/ 文件路径下。
UserMapper.xml
HeroMapper.xml
测试可以使用 SpringBootTest,也可以放到 Controller中,个人习惯用 Controller。
@RestController @RequestMapping("/test") public class TestController { @Autowired private UserDao userDao; @Autowired private HeroDao heroDao; /** * 查找所有用户 * @return */ @RequestMapping("/getAllUser") public ListgetAllUser(){ return userDao.getAll(); } /** * 查找所有英雄 * @return */ @RequestMapping("/getAllHero") public List getAllHero(){ return heroDao.getAllHero(); } }
浏览器直接访问:http://127.0.0.1:8080/test/
加上相关测试路径即可。
看完上述内容,你们对Spring Boot 中怎么配置MyBatis多数据源有进一步的了解吗?如果还想了解更多知识或者相关内容,请关注创新互联行业资讯频道,感谢大家的支持。