JDBC（连接数据库的基本操作步骤）

• 熟悉基本的数据库连接操作顺序

具体步骤见注释

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;

public class JDBCDemo1 {
    public static void main(String[] args) {
        String sql = null;
        Connection connection = null;
        Statement statement = null;
        try {
            //注册驱动
            Class.forName("com.mysql.jdbc.Driver");
            //获取连接
            connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/db", "root", "root");
            //获取执行sql的对象
            statement = connection.createStatement();
            //为sql赋值
            sql = "INSERT INTO JOB VALUES(NULL,'LIWEICHENG','WAN') ";
            //执行sql
            int count = statement.executeUpdate(sql);
            //处理结果
            System.out.println(count);

        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        } finally {
            //释放资源
            try {
                statement.close();
            } catch (SQLException throwables) {
                throwables.printStackTrace();
            }
            try {
                connection.close();
            } catch (SQLException throwables) {
                throwables.printStackTrace();
            }
        }
    }
}