由于Oracle授权问题，Maven3不提供Oracle JDBC driver，需要手动添加 （具体方法在上面的随笔中有详细说明）

直接上代码

OracleUtil 连接类

package com.JavaOracle;

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

public class OracleUtil {
    //数据库连接地址
    private static String url="jdbc:oracle:thin:@192.168.1.180:1521:orcl";
    //用户名
    private static String username= "sys as sysdba";
    //密码
    private static String password ="admindljjk";
    //驱动名称
    private static String jdbcName = "oracle.jdbc.OracleDriver";

    /*获取数据库连接 */
    public static Connection getCon(){
        try {
            Class.forName(jdbcName);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        Connection con = null;
        try {
            con = DriverManager.getConnection(url,username,password);
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return con;
    }

    /*关闭数据库连接*/
    public static void closeCon(Connection con) throws SQLException {
        if (con != null)
            con.close();
    }

    /*
    public static void main(String[] args){
        try {
            getCon();
            System.out.println("数据库连接成功");
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("数据库连接失败");
        }
    }
    */

}

OracleDemo   具体业务增删改查类

package com.JavaOracle;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class OracleDemo {

    //连接对象
    Connection connection=null;
    //创建预编译对象
    PreparedStatement ps=null;
    //创建结果集
    ResultSet rs = null;

    /*插入*/
    public int insert(){
        int result = 0;
        connection = OracleUtil.getCon();
        String sql = "insert into CTI_AGENT_WORK_REST ";
        sql=sql+" (ID,AGENT_NAME,DATE_TIME,STATUS) ";
        sql=sql+" values(?,?,?,? )";
        try {
            ps = connection.prepareStatement(sql);
            ps.setInt(1,2323232);
            ps.setString(2,"老刘");
            ps.setString(3,"2021-07-26 15:51:12");
            ps.setString(4,"Rest");

            result = ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }finally {
            try {
                OracleUtil.closeCon(connection);
            }catch (SQLException e) {
                e.printStackTrace();
            }
        }
        return result;
    }
    /*查询*/
    public void select(){
        connection = OracleUtil.getCon();
        String sql = "select * from CTI_AGENT_WORK_REST";
        try {
            ps = connection.prepareStatement(sql);
            rs = ps.executeQuery();
            while (rs.next()){
                int id = rs.getInt(1);
                String AGENT_NAME = rs.getString(2);
                String DATE_TIME = rs.getString(3);
                String STATUS= rs.getString(4);
                System.out.println("ID:"+id + " AGENT_NAME:"+AGENT_NAME+" DATE_TIME:"+DATE_TIME+" STATUS:"+STATUS);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }finally {
            try {
                OracleUtil.closeCon(connection);
            }catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
    /*修改*/
    public int update(){
        connection = OracleUtil.getCon();
        String sql = "update student set name = ?,gender = ? where id = ?";
        int result = 0;
        try {
            ps = connection.prepareStatement(sql);
            ps.setString(1,"老张");
            ps.setString(2,"男");
            ps.setInt(3,2);
            result = ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }finally {
            try {
                OracleUtil.closeCon(connection);
            }catch (SQLException e) {
                e.printStackTrace();
            }
        }

        return result;

    }

    /*删除 */
    public int delete(){
        int result = 0;
        connection = OracleUtil.getCon();
        String sql = "delete from student where id = ?";
        try {
            ps = connection.prepareStatement(sql);
            ps.setInt(1,1);
            result = ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }finally {
            try {
                OracleUtil.closeCon(connection);
            }catch (SQLException e) {
                e.printStackTrace();
            }
        }
        return result;
    }

    /*
    public static void main(String[] args){
        OracleDemo od = new OracleDemo();
        //int add = od.add();
        System.out.println(add);
        od.select();
//        System.out.println(od.delete());
    }*/

}

主函数

public static void main( String[] args )
 {
        System.out.println( "Hello JavaOracle !" );

        OracleDemo myDB = new OracleDemo();
        int result = myDB.insert();
        System.out.println("insert 结果： "+result);
        myDB.select();
        //System.out.println(myDB.delete());
 }