package com.test.tool;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class JDBCUtlTool {
  public static Connection getConnection(){
    String driver="com.mysql.jdbc.Driver";  //獲取mysql數(shù)據(jù)庫的驅(qū)動類
    String url="jdbc:mysql://localhost:3306/test"; //連接數(shù)據(jù)庫（kucun是數(shù)據(jù)庫名）
    String name="root";//連接mysql的用戶名
    String pwd="123456";//連接mysql的密碼
    try{
      Class.forName(driver);
      Connection conn=DriverManager.getConnection(url,name,pwd);//獲取連接對象
      return conn;
    }catch(ClassNotFoundException e){
      e.printStackTrace();
      return null;
    }catch(SQLException e){
      e.printStackTrace();
      return null;
    }
  }
  public static void closeAll(Connection conn,PreparedStatement ps,ResultSet rs){
    try{
      if(rs!=null){
        rs.close();
      }
    }catch(SQLException e){
      e.printStackTrace();
    }
    try{
      if(ps!=null){
        ps.close();
      }
    }catch(SQLException e){
      e.printStackTrace();
    }
    try{
      if(conn!=null){
        conn.close();
      }
    }catch(SQLException e){
      e.printStackTrace();
    }
  }
  public static void main(String[] args) throws SQLException
  {
    Connection cc=JDBCUtlTool.getConnection();
    if(!cc.isClosed())
    System.out.println("Succeeded connecting to the Database!");
    Statement statement = cc.createStatement();
    String sql = "select * from test2";
    ResultSet rs = statement.executeQuery(sql);
    while(rs.next()) {
      System.out.println(rs.getString("id")+"");
    }
  }
}