MySQL 读写分离实例详解

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");
 
   .......
 }
}