SpringBoot+Mybatis多數據源配置和切換
作者：九天銀河聊編程
今天介紹一個SpringBoot+mybatis的多數據源的解決方案。
前言
在項目開發中，經常會涉及到一個應用程序調用多個數據的情況。今天介紹一個SpringBoot+mybatis的多數據源的解決方案。
數據庫準備
創建兩個數據庫，兩個數據庫都有Im_person表，兩個表中無數據。
代碼結構
說明：我這里只是為了體現效果，就省略了service步驟。各位大牛開發，不喜勿噴，理解萬歲，嘻嘻！！
- application.yml中配置兩個數據源，配置如下：
master:
datasource:
type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://127.0.0.1:3306/db1?useUnicode=true&characterEncoding=utf-8&useSSL=false&allowMultiQueries=true&serverTimezone=GMT%2B8
username: root
password: 123456
slave:
datasource:
type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://127.0.0.1:3306/db2?useUnicode=true&characterEncoding=utf-8&useSSL=false&allowMultiQueries=true&serverTimezone=GMT%2B8
username: root
password: 123456
2.SpringBoot多數據源配置類。
@Configuration
@MapperScan(basePackages = "com.zhangls.multipledatasource.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);
ResourcePatternResolver resourceResolver = new PathMatchingResourcePatternResolver();
List<String> mapperLocations = new ArrayList<>();
mapperLocations.add("classpath*:/mapper/master/*.xml");
List<Resource> resources = new ArrayList();
if (mapperLocations != null) {
for (String mapperLocation : mapperLocations) {
try {
Resource[] mappers = resourceResolver.getResources(mapperLocation);
resources.addAll(Arrays.asList(mappers));
} catch (IOException e) {
// ignore
}
}
}
bean.setMapperLocations(resources.toArray(new Resource[resources.size()]));
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);
}
}
@Configuration
@MapperScan(basePackages = "com.zhangls.multipledatasource.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/*.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);
}
}
說明：兩個數據的代碼基本相同，不同的是要配置好掃描包的路徑，以及mybatis的SQL文件的路徑。所以不同的連接DAO和mapper文件要放在不同的文件夾，方便配置管理。
實現效果
以上的配置已經實現了多數據源的配置，下面實現一個功能。通過一個接口同時向兩個庫的兩個表中導入不同的數據。
controller代碼如下：
@RestController
public class DataSourceController {
@Resource
private MasterPersonMapper masterPersonMapper;
@Resource
private SlavePersonMapper slavePersonMapper;
@GetMapping("/datasource")
public String datasource() {
ImPerson person1 = new ImPerson();
person1.setPersonId("1");
person1.setGender("男");
person1.setBirthday(new Date());
person1.setLocation("中國");
masterPersonMapper.insertSelective(person1);
ImPerson person2 = new ImPerson();
person2.setPersonId("2");
person2.setGender("女");
person2.setBirthday(new Date());
person2.setLocation("中國北京");
slavePersonMapper.insertSelective(person2);
return "導入成功";
}
}
執行：
結果：
可以看到兩個庫中的兩個表都導入了數據。
責任編輯：姜華
來源：
今日頭條
