下面這個程式碼可以正常執行，沒有問題

import java.sql.{Connection, DriverManager, ResultSet, Statement}

object Main {
  def main(args: Array[String]): Unit = {
    val driver = "com.mysql.cj.jdbc.Driver"
    val url = "jdbc:mysql://localhost:3306/test?useSSL=false&serverTimezone=Asia/Shanghai"
    val user = "root"
    val password = "404notfounD"

    Class.forName(driver)
    
    val conn: Connection = DriverManager.getConnection(url, user, password)

    val SQL = "select * from tran"
    val stmt: Statement = conn.createStatement()

    val rs: ResultSet = stmt.executeQuery(SQL)

    while (rs.next()) {
      println(rs.getString("statis_date"))
    }

    rs.close()
    stmt.close()
    conn.close()
  }
}
 

但如果匯入包的時候，吧

import java.sql.{Connection, DriverManager, ResultSet, Statement}

替換為

import java.sql._

上面的程式碼就會報錯
因為java.sql._下也有一個Array類，與scala.array會衝突，main的引數就會變成了java.sql.Array型別，因此最好就是用哪個匯入哪個