本地连接的连接字符串格式为jdbc:product_name: database_name,远程连接的格式为jdbc:product_name://host_name/port_ number:database_name。即如果我的数据库名字为rdb,则本地连接字符串为jdbc:db2:rdb(当然rdb一定是处于DB2的默认实例之中的),而远程连接字符串为jdbc:db2://192.168.1.10/50000:rdb(这里192.1...
在application.yml文件中,添加以下配置: spring:datasource:driver-class-name:com.mysql.cj.jdbc.Driver 1. 2. 3. 以上两种方法都将DriverClassName配置为com.mysql.cj.jdbc.Driver,这是MySQL Connector/J驱动的类名。 4. 测试连接 为了验证配置是否生效,我们可以编写一个简单的测试代码来连接MySQL数据库。 import...
(`gradeid`,`gradename`) VALUES(1,'大一'),(2,'大二'),(3,'大三'),(4,'大四'),(5,'预科班'); -- test04 -- 插入科目数据 INSERT INTO `subject`(`subjectno`,`subjectname`,`classhour`,`gradeid`)VALUES (1,'高等数学-1',110,1), (2,'高等数学-2',110,2), (3,'高等数学-3'...
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将MySQL 数据库 5.0 使用的驱动类com.mysql.jdbc.Driver改为com.mysql.cj.jdbc.Driver,驱动程序是通过 SPI 自动注册的,通常是不需要手动加载驱动类。修改之后的配置文件如下图所示: <!-- 加载数据库驱动 --><property name="driverClass" value="com.mysql.cj.jdbc.Driver"></property> ...
public class Http { private DataSource dataSource; public Http() { HikariConfig config = new HikariConfig(); config.setJdbcUrl("jdbc:mysql://" + System.getenv("DB_HOST") + ":"+ System.getenv("DB_PORT") + "/" + System.getenv("DB_DATABASE")); config.setUsername(System.getenv...
加载驱动 Class.forName("com.mysql.jdbc.Driver");//固定写法 //2. 用户信息和url //useUnicode=true&characterEncoding=utf8&&useSSL=true String url ="jdbc:mysql://localhost:3306/jdbcstudy?useUnicode=true&characterEncoding=utf8&&useSSL=false"; String name = "root"; String password = "123456";...
database:定义分片所属数据库 1.5 dataHost标签 该标签在Mycat逻辑库中作为底层标签,直接定义了具体的数据库实例、读写分离,心跳语句。 核心属性: name:唯一标识符,供上层标签使用 maxCon/minCon:最大连接数/最小连接数 balance:负载均衡策略,取值0,1,2,3 ,读写分离的时候,在详细说明这四个取值的意义。
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