ScalikeJDBC连接MySQL

ScalikeJDBC是一个Scala的JDBC框架，官网说easy-to-use and very flexible，易用又灵活~

1、添加依赖

<dependency>
            <groupId>org.scalikejdbc</groupId>
            <artifactId>scalikejdbc_2.11</artifactId>
            <version>3.3.2</version>
        </dependency>

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <version>1.4.197</version>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.2.3</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.15</version>
        </dependency>

2、上代码

import scalikejdbc._

object MySQLDAO {

  def main(args: Array[String]): Unit = {
    // initialize JDBC driver & connection pool
    Class.forName("org.h2.Driver")
    ConnectionPool.singleton("jdbc:mysql:///film?characterEncoding=utf8", "root", "root")

    val id = 1
    val name = "复联%"
    val value = sql"""select * from movie where name LIKE $name ORDER BY id DESC """
    println(value)

    // simple example
    val lasts: List[Map[String, Any]] = DB.readOnly { implicit session =>
      sql"""select * from movie where name LIKE $name ORDER BY id DESC """.map(_.toMap()).list.apply()
    }
    println(lasts)
  }
}

3、排错

1）版本

java.lang.NoSuchMethodError: scala.Product.$init$

这种方法找不到的问题通常都是jar包没引对或版本不一致， pom.xml 中配置的 scalikejdbc_2.11 必须和系统sdk的scala版本一致（也是2.11.x）

2）MySQL时区

java.sql.SQLException: The server time zone value 'Öйú±ê׼ʱ¼ä' is unrecognized or represents more than one time
zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a
more specifc time zone value if you want to utilize time zone support.

这是因为 mysql-connector-java 的版本是 8.0.15

解决方法：要么换成 5.1.x 的版本，或者在cmd mysql客户端输入 set global time_zone = '+8:00';
同样可以解决在IDEA的DataSource配置中连不上 MySQL 的时候。（08001错误）