scala 快速入门开发四（连接mysql增删改查）

scala 可以与Java一起连接mysql 操作数据库

首先引入mysql 的jar包

方式一使用scala 中的api 进行插入操作  

package org.zw.sql
import java.sql.{ResultSet, DriverManager}

import scala.util.parsing.json.{JSONFormat, JSONObject, JSONArray, JSON}

object ScalaMysql {

  def main(args: Array[String]) {
    // create database connection
    val dbc = "jdbc:mysql://localhost:3306/test?user=root&password=root"
    classOf[com.mysql.jdbc.Driver]
    val conn = DriverManager.getConnection(dbc)
    
    
    val driver = "com.mysql.jdbc.Driver"  
    val url = "jdbc:mysql://localhost:3306/test"  
    val username = "root"  
    val password = "root"  

    // do database insert
    try {
      Class.forName(driver)  
      val connection = DriverManager.getConnection(url, username, password)  
      
      
      val prep = conn.prepareStatement("INSERT INTO blog (title, body) VALUES (?, ?) ")
      prep.setString(1, "Nothing great was ever achieved without enthusiasm.")
      prep.setString(2, "Ralph Waldo Emerson")
      prep.executeUpdate
    }
    finally {
      conn.close
    }
  }
}

方式二、使用Java  API 斤行数据库数据查询

package org.zw.sql


import java.sql.DriverManager  
import java.sql.Connection  

object ScalaMysql2 {

   def main(args: Array[String]) {  
    // connect to the database named "mysql" on the localhost  
    val driver = "com.mysql.jdbc.Driver"  
    val url = "jdbc:mysql://localhost/test"  
    val username = "root"  
    val password = "root"  
    
    var connection:Connection = null  
   
    try {  
        
      Class.forName(driver)  
      connection = DriverManager.getConnection(url, username, password)  
   
      val statement = connection.createStatement()  
      val resultSet = statement.executeQuery("select * from blog")  
      while ( resultSet.next() ) {  
        val name = resultSet.getString("title")  
        val password = resultSet.getString("body")  
        println("name, password = " + name + ", " + password)  
      }  
    } catch {  
       case e => e.printStackTrace  
       //case _: Throwable => println("ERROR")  
    }  
    connection.close()  
  }  
}

其实大部分与Java 的jdbc 是差不多的