spring boot多資料來源動態切換程式碼例項
阿新 • • 發佈:2020-01-16
這篇文章主要介紹了spring boot多資料來源動態切換程式碼例項,文中通過示例程式碼介紹的非常詳細,對大家的學習或者工作具有一定的參考學習價值,需要的朋友可以參考下
當專案中存在多資料來源時,就涉及到資料來源的動態切換,通過研究,特此記錄一下。
1、maven依賴
<!--資料庫連線--> <dependency> <groupId>com.oracle</groupId> <artifactId>ojdbc6</artifactId> <version>11.2.0.4</version> <scope>runtime</scope> </dependency> <!--資料庫連線池-> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> <version>1.1.10</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> <!--aop-> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-aop</artifactId> </dependency>
2、多資料來源資訊配置
#多資料來源測試 spring: datasource: druid: master: driver-class-name: oracle.jdbc.driver.OracleDriver username: test password: test url: jdbc:oracle:thin:@//ip1:1521/orcl slave: driver-class-name: oracle.jdbc.driver.OracleDriver username: test password: test url: jdbc:oracle:thin:@//ip2:1521/orcl
3、資料來源配置資訊轉換成實體類
@ConfigurationProperties(prefix = "spring.datasource.druid") @Data @Component public class DataSourceProperties { private Map<String,String>master; private Map<String,String>slave; }
4、動態資料來源切換類
public class DynamicDataSource extends AbstractRoutingDataSource { private static final ThreadLocal<String> contextHolder = new ThreadLocal<>(); public DynamicDataSource(DataSource defaultTargetDataSource,Map<Object,Object> targetDataSources) { super.setDefaultTargetDataSource(defaultTargetDataSource); super.setTargetDataSources(targetDataSources); super.afterPropertiesSet(); } @Override protected Object determineCurrentLookupKey() { return getDataSource(); } public static void setDataSource(String dataSource) { contextHolder.set(dataSource); } public static String getDataSource() { return contextHolder.get(); } public static void clearDataSource() { contextHolder.remove(); } }
5、多資料來源配置類
@Configuration public class DynamicDataSourceConfig { @Bean public DataSource master(@Autowired DataSourceProperties dataSourceProperties){ DruidDataSource druidDataSource = new DruidDataSource(); Map<String,String> master = dataSourceProperties.getMaster(); druidDataSource.setUsername(master.get("username")); druidDataSource.setPassword(master.get("password")); druidDataSource.setUrl(master.get("url")); //其他引數配置 省略 return druidDataSource; } @Bean public DataSource slave(@Autowired DataSourceProperties dataSourceProperties){ DruidDataSource druidDataSource = new DruidDataSource(); Map<String,String> slave = dataSourceProperties.getSlave(); druidDataSource.setUsername(slave.get("username")); druidDataSource.setPassword(slave.get("password")); druidDataSource.setUrl(slave.get("url")); //其他引數配置 省略 return druidDataSource; } @Bean @Primary public DynamicDataSource dataSource(DataSource master,DataSource slave){ Map<Object,Object>map = new HashMap<>(4); map.put("master",master); map.put("slave",slave); return new DynamicDataSource(master,map); } }
6、自定義@DataSource註解
@Target(ElementType.METHOD) @Retention(RetentionPolicy.RUNTIME) public @interface DataSource { String name() default "master"; }
7、Aop切面類配置
@Component @Aspect public class DataSourceAspect { @Pointcut("@annotation(com.zxgeo.sso.muiltDatasource.anons.DataSource)") public void dataSourcePointCut(){} @Around(value = "dataSourcePointCut()") public Object around(ProceedingJoinPoint point) throws Throwable { MethodSignature signature = (MethodSignature) point.getSignature(); Method method = signature.getMethod(); DataSource dataSource = method.getAnnotation(DataSource.class); if(dataSource == null){ DynamicDataSource.setDataSource("master"); }else { DynamicDataSource.setDataSource(dataSource.name()); } try { return point.proceed(); } finally { DynamicDataSource.clearDataSource(); } } }
8、啟動配置註解資訊,重要(不然執行會報錯)
@SpringBootApplication(exclude= {DataSourceAutoConfiguration.class})
9、測試
(1)、service層(此處沒有使用mybatis)
@Service public class TestService { @Autowired private javax.sql.DataSource dataSource; @DataSource public Map<String,Object> getMasterDataSource() throws SQLException { Connection connection = dataSource.getConnection(); Map<String,Object> map; try (PreparedStatement preparedStatement = connection.prepareStatement("SELECT * FROM AA WHERE A=10001")) { ResultSet resultSet = preparedStatement.executeQuery(); map = new HashMap<>(); while (resultSet.next()){ map.put("A",resultSet.getString("A")); map.put("B",resultSet.getString("B")); map.put("C",resultSet.getString("C")); } } return map; } @DataSource(name = "slave") public Map<String,Object> getSlaveDataSource() throws SQLException { Connection connection = dataSource.getConnection(); Map<String,Object> map; try (PreparedStatement preparedStatement = connection.prepareStatement("SELECT * FROM AA WHERE A=10002")) { ResultSet resultSet = preparedStatement.executeQuery(); map = new HashMap<>(); while (resultSet.next()){ map.put("A",resultSet.getString("C")); } } return map; } }
(2)、單元測試
@SpringBootTest @RunWith(SpringRunner.class) class SsoApplicationTests { @Autowired private TestService testService; @Test public void muliDatasorce() throws SQLException { Map<String,Object> masterDataSourceUrl = testService.getMasterDataSource(); System.out.println(masterDataSourceUrl); Map<String,Object> slaveDataSourceUrl = testService.getSlaveDataSource(); System.out.println(slaveDataSourceUrl); } }
(3)、結果:
以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支援我們。