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JDBC 连接到主从架构的 MySQL 数据库

JDBC 连接到主从架构的 MySQL 数据库,但MySQL配置了主从结构后,作为客户的的应用程序可使用mysql的jdbc驱动自带的 ReplicationDriver驱动来进行连接

import java.sql.Connection;
import java.sql.ResultSet;
import java.util.Properties;

import com.mysql.jdbc.ReplicationDriver;

public class ReplicationDriverDemo {

public static void main(String[] args) throws Exception {
ReplicationDriver driver = new ReplicationDriver();

Properties props = new Properties();

// We want this for failover on the slaves
props.put("autoReconnect", "true");

// We want to load balance between the slaves
props.put("roundRobinLoadBalance", "true");

props.put("user", "foo");
props.put("password", "bar");

//
// Looks like a normal MySQL JDBC url, with a
// comma-separated list of hosts, the first
// being the 'master', the rest being any number
// of slaves that the driver will load balance against
//

Connection conn =
driver.connect("jdbc:mysql:replication://master,slave1,slave2,slave3/test",
props);

//
// Perform read/write work on the master
// by setting the read-only flag to "false"
//

conn.setReadOnly(false);
conn.setAutoCommit(false);
conn.createStatement().executeUpdate("UPDATE some_table ....");
conn.commit();

//
// Now, do a query from a slave, the driver automatically picks one
// from the list
//

conn.setReadOnly(true);

ResultSet rs =
conn.createStatement().executeQuery("SELECT a,b FROM alt_table");

.......
}
}

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