spring-boot-starter-data-jpa依赖于spring-boot-starter-jdbc,而spring boot对JDBC做了一些自动配置。 spring boot默认JPA的实现者是Hibernate Spring Boot自动开启了对Spring Data JPA的支持,我们无需在配置类里显式声明@EnableJpaRepositories 5.实战: (1)为了省时间,并没有按照作者所说安装oracle,使用的依旧是mysq...
1、JDBC(Java DataBase Connectivity/Java数据库连接 )[原始手工] java应用接口访问数据库的JavaAPI规范。为各种数据库(mysql、oracle),提供一个统一的接口,应用程序通过JDBC执行各种SQL(select、insert)操作。不同的数据库厂商都有自己的实现类,统一规范也就有了数据库驱动。 优点:运行期:快捷、高效 缺点:编辑器:...
datasource.setMaxPoolPreparedStatementPerConnectionSize(20);// datasource.setConnectionProperties("oracle.net.CONNECT_TIMEOUT=6000;oracle.jdbc.ReadTimeout=60000");//对于耗时长的查询sql,会受限于ReadTimeout的控制,单位毫秒datasource.setConnectionProperties("druid.stat.mergeSql=true;druid.stat.slowSqlMillis...
How to connect to Oracle NoSQL Database The application needs to know how to connect to the cloud service. This is done defining a configuration Spring bean that provides a NosqlDbConfig object. There are a couple of ways to connect to Oracle NoSQL Database Cloud Service. If ...
{@OverridepublicvoidsetProperties(Properties properties){super.setProperties(properties);// 获取配置文件中的已经加密的密码(spring.datasource.druid.connect-properties.password)Stringpwd=(String)properties.get("password");if(StringUtils.isNotEmpty(pwd)) {try{// 这里的代码是将密码进行解密,并设置String...
接下来,我们在主库smiling-datasource中,创建表databasesource,用于存储多数据源相关信息。表结构设计如下 创建好表之后,向表databasesource中存储test1、test2、test3三个数据库的相关配置信息 在主库的表databasesource中存储好数据源信息后,接下来分别在test1、test2、test3以及主库smiling-datasource中都创建sys_user...
/** * Data access exception thrown when a resource fails completely: * for example, if we can't connect to a database using JDBC. * * @author Rod Johnson * @author Thomas Risberg */ @SuppressWarnings("serial") public class DataAccessResourceFailureException extends NonTransientDataAccessResou...
Oracle RAC jdbc:oracle:thin@(DESCRIPTION= (LOAD_BALANCE=on) (ADDRESS=(PROTOCOL=TCP)(HOST=racnode1) (PORT=1521)) (ADDRESS=(PROTOCOL=TCP)(HOST=racnode2) (PORT=1521)) (CONNECT_DATA=(SERVICE_NAME=service_name))) jdbc:oracle:thin:@(DESCRIPTION= (ADDRESS=(PROTOCOL=TCP)(HOST=125.22.42.68)(...
支持已实现 XA 接口的数据库的 XA 模式,目前已支持MySQL、Oracle、TiDB和MariaDB; 三个角色 1> TC (Transaction Coordinator) - 事务协调者 维护全局和分支事务的状态,驱动全局事务提交或回滚。 2> TM (Transaction Manager) - 事务管理器 定义全局事务的范围:开始全局事务、提交或回滚全局事务。
Later we'll see how to configure the sample to run with the Oracle Database. Now you can run your project. Navigate to the index.html page in the application navigator and right click to choose Run. JDeveloper comes with a built-in J2EE container - The Oracle J2EE Container, so you don...