1、注冊驅動
2、獲取連接
3、創建一個Statement語句對象
4、執行SQL語句
5、處理結果集
6、關閉資源

import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.Statement;public class DbUtil {public static final String URL = "jdbc:mysql://localhost:3306/imooc";public static final String USER = "liulx";public static final String PASSWORD = "123456";public static void main(String[] args) throws Exception {//1.加載驅動程序Class.forName("com.mysql.jdbc.Driver");//2. 獲得數據庫連接Connection conn = DriverManager.getConnection(URL, USER, PASSWORD);//3.操作數據庫，實現增刪改查Statement stmt = conn.createStatement();ResultSet rs = stmt.executeQuery("SELECT user_name, age FROM imooc_goddess");//如果有數據，rs.next()返回truewhile(rs.next()){System.out.println(rs.getString("user_name")+" 年齡："+rs.getInt("age"));}} } public class DbUtil {public static final String URL = "jdbc:mysql://localhost:3306/imooc";public static final String USER = "liulx";public static final String PASSWORD = "123456";private static Connection conn = null;static{try {//1.加載驅動程序Class.forName("com.mysql.jdbc.Driver");//2. 獲得數據庫連接conn = DriverManager.getConnection(URL, USER, PASSWORD);} catch (ClassNotFoundException e) {e.printStackTrace();} catch (SQLException e) {e.printStackTrace();}}public static Connection getConnection(){return conn;} }public class GoddessDao {//增加public void addGoddess(Goddess g) throws SQLException {//獲取連接Connection conn = DbUtil.getConnection();//sqlString sql = "INSERT INTO imooc_goddess(user_name, sex, age, birthday, email, mobile,"+"create_user, create_date, update_user, update_date, isdel)"+"values("+"?,?,?,?,?,?,?,CURRENT_DATE(),?,CURRENT_DATE(),?)";//預編譯PreparedStatement ptmt = conn.prepareStatement(sql); //預編譯SQL，減少sql執行//傳參ptmt.setString(1, g.getUser_name());ptmt.setInt(2, g.getSex());ptmt.setInt(3, g.getAge());ptmt.setDate(4, new Date(g.getBirthday().getTime()));ptmt.setString(5, g.getEmail());ptmt.setString(6, g.getMobile());ptmt.setString(7, g.getCreate_user());ptmt.setString(8, g.getUpdate_user());ptmt.setInt(9, g.getIsDel());//執行ptmt.execute();} }

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