Java連接Mysql數(shù)據(jù)庫詳細(xì)代碼實(shí)例

package _9_3_test;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Scanner;

import com.mysql.jdbc.Driver;
import com.mysql.jdbc.Statement;

public class Scr {

  public static void main(String[] args) {
    
    //JDBC驅(qū)動(dòng)名
    String JDBC_DRIVER = "com.mysql.jdbc.Driver";
    
    //數(shù)據(jù)庫URL：這里的tt是數(shù)據(jù)庫名稱
    String JDBC_URL = "jdbc:mysql://localhost:3306/tt?useSSL=false&serverTimezone=UTC";
    
//    數(shù)據(jù)庫的用戶名與密碼
    String USER = "root";
    String PASS = "admin123";
    
    //通過DriverManager類獲得該連接對象才能訪問數(shù)據(jù)庫
    Connection connection = null;

//    通過Connection獲得該結(jié)果對象用于執(zhí)行靜態(tài)的SQL語句
    Statement statement = null;
    
    try {
//      注冊JDBC驅(qū)動(dòng)
      Class.forName(JDBC_DRIVER);
      
//      數(shù)據(jù)庫的連接：通過DriverManager類的getConnection方法，傳入三個(gè)參數(shù)：數(shù)據(jù)庫URL、用戶名、用戶密碼，實(shí)例化connection對象
      connection = DriverManager.getConnection(JDBC_URL,USER,PASS);
      
//      實(shí)例化statement對象
      statement = (Statement) connection.createStatement();
      
//      定義數(shù)據(jù)庫查詢語句：查詢aa表中的name、sex兩列數(shù)據(jù)
      String sql = "SELECT name,sex FROM aa";
//      執(zhí)行查詢語句
      ResultSet rSet = statement.executeQuery(sql);
      
//      展開查詢到的數(shù)據(jù)
      while(rSet.next()) {
        
//        這里getString()方法中的參數(shù)對應(yīng)的是數(shù)據(jù)庫表中的列名
        String get_name = rSet.getString("name");
        String get_sex = rSet.getString("sex");
        
//        輸出數(shù)據(jù)
        System.out.println("名字:"+get_name);
        System.out.print("性別:"+get_sex);
        
        
      }
      
//      依次關(guān)閉對象
      rSet.close();
      statement.close();
      connection.close();
      
    } catch (ClassNotFoundException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    } catch (SQLException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
    
    
  }

}