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简介

ShardingSphere-JDBC 提供了 JDBC 驱动,可以仅通过配置变更即可使用,无需改写代码。

使用步骤

引入 Maven 依赖

<dependency>
    <groupId>org.apache.shardingsphere</groupId>
    <artifactId>shardingsphere-jdbc-core</artifactId>
    <version>${shardingsphere.version}</version>
</dependency>

使用驱动

使用原生驱动

Class.forName("org.apache.shardingsphere.driver.ShardingSphereDriver");
String jdbcUrl = "jdbc:shardingsphere:classpath:config.yaml";

String sql = "SELECT i.* FROM t_order o JOIN t_order_item i ON o.order_id=i.order_id WHERE o.user_id=? AND o.order_id=?";
try (
        Connection conn = DriverManager.getConnection(jdbcUrl);
        PreparedStatement ps = conn.prepareStatement(sql)) {
    ps.setInt(1, 10);
    ps.setInt(2, 1000);
    try (ResultSet rs = preparedStatement.executeQuery()) {
        while(rs.next()) {
            // ...
        }
    }
}

使用数据库连接池

String driverClassName = "org.apache.shardingsphere.driver.ShardingSphereDriver";
String jdbcUrl = "jdbc:shardingsphere:classpath:config.yaml";

// 以 HikariCP 为例 
HikariDataSource dataSource = new HikariDataSource();
dataSource.setDriverClassName(driverClassName);
dataSource.setJdbcUrl(jdbcUrl);

String sql = "SELECT i.* FROM t_order o JOIN t_order_item i ON o.order_id=i.order_id WHERE o.user_id=? AND o.order_id=?";
try (
        Connection conn = dataSource.getConnection();
        PreparedStatement ps = conn.prepareStatement(sql)) {
    ps.setInt(1, 10);
    ps.setInt(2, 1000);
    try (ResultSet rs = preparedStatement.executeQuery()) {
        while(rs.next()) {
            // ...
        }
    }
}

配置说明

驱动类名称

org.apache.shardingsphere.driver.ShardingSphereDriver

URL 配置说明

  • jdbc:shardingsphere: 为前缀
  • 配置文件:xxx.yaml,配置文件格式与 YAML 配置一致
  • 配置文件加载规则:
    • 无前缀表示从绝对路径加载配置文件
    • classpath: 前缀表示从类路径中加载配置文件