package com.hy;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.text.MessageFormat;

public class OracleConnector {

    // 连接到数据库的四大属性
    private static final String DRIVER = "oracle.jdbc.driver.OracleDriver";
    private static final String DBURL = "jdbc:oracle:thin:@127.0.0.1:1521:orcl";
    private static final String USER = "system";
    private static final String PSWD = "Ufo12345678";

    public static void testConnToDB() {
        Connection conn = null;
        Statement stmt = null;

        try{
            Class.forName(DRIVER).newInstance();
            conn = DriverManager.getConnection(DBURL, USER, PSWD);
            stmt = conn.createStatement();

            String sql = "select id,name,age,createdtime from firsttb";
            ResultSet rs = stmt.executeQuery(sql);

            int index = 0;
            while (rs.next()) {
                index++;

                String id = rs.getString("id");
                String name = rs.getString("name");
                String age = rs.getString("age");
                String cdate = rs.getString("createdtime");

                String raw = "#{0},{1},{2},{3},{4}";
                Object[] arr = { index, id, name, age, cdate };
                String outStr = MessageFormat.format(raw, arr);
                System.out.println(outStr);
            }
        } catch (Exception e) {
            System.out.print(e.getMessage());
        } finally {
            try {
                stmt.close();
                conn.close();
            } catch (SQLException e) {
                System.out.print("Can't close stmt/conn because of " + e.getMessage());
            }
        }
    }

    /**
     * 执行点
     * @param args
     */
    public static void main(String[] args) {
        testConnToDB();
    }
}

#1,1,ANDY,20,2019-11-09 09:19:10
#2,2,Bill,30,2019-11-09 09:19:39
#3,3,Cindy,40,2019-11-09 09:19:45