java 连接oracle 进行增删改查

Posted 2020-10-07 博客园站长

1、在DAO层新增类OraclePersionDao

package com.test.dao;

import java.sql.*;

/**
 * Created by wdw on 2017/9/16.
 */
public class OraclePersionDao {

    // 数据库驱动类
    private String dbDriver = "oracle.jdbc.driver.OracleDriver";
    // 连接数据库url
    private String dbURL = "jdbc:oracle:thin:@192.168.31.128:1521:orcl";
    // 连接数据库用户名
    private String dbUser = "PHIP";
    // 连接数据库密码
    private String dbPwd = "PHIP";
    // 获取数据库连接方法, 返回Connection对象
    private Connection con = null;
    //数据执行语句
    private Statement stat = null;
    private String sql = null;
    private ResultSet rs = null;

    //创建数据库连接
    public Connection getDBConnect() {
        try {
// 加载数据库驱动
            Class.forName(dbDriver);
            con = DriverManager.getConnection(dbURL, dbUser, dbPwd);
        } catch (Exception e) {
            System.out.println(e);
        }
        return con;
    }

    //增加
    public void Add() {
        con = getDBConnect();
        sql = "insert into sys_users(id,code,name)" +
                "values(\'1\',\'lucy\',\'w\')";
        try {
            stat = con.createStatement();
            stat.executeUpdate(sql);
        }
        catch (SQLException e) {
// TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    //删除
    public void Delete() {
        con = getDBConnect();
        sql = "delete  from sys_users " +
                "where ID=1";
        try {
            stat = con.createStatement();
            stat.executeUpdate(sql);
        } catch (SQLException e) {
// TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

    //修改
    public void Update() {
        con = getDBConnect();
        sql = "update sys_users set code=\'c2\' where id=\'1\'";
        try {
            stat = con.createStatement();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    //查询
    public void Search() {
        con = getDBConnect();
// 创建表的sql语句
        sql = "SELECT * FROM sys_users";
        try {
            stat = con.createStatement();
            rs = stat.executeQuery(sql);
            while (rs.next()) {
                String id = rs.getString(1);
                String stuname = rs.getString(2);
                String stusex = rs.getString(3);
                System.out.println(id + "," + stuname + "," + stusex);
            }
        } catch (SQLException e) {
// TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
//功能:关闭数据库的连接

    public void close() {//6.释放资源
        try { // 捕捉异常
            try {
                if (rs != null) { // 当ResultSet对象的实例rs不为空时

                    rs.close(); // 关闭ResultSet对象
                }
            } finally {
                try {
                    if (stat != null) { // 当Statement对象的实例stmt不为空时

                        stat.close(); // 关闭Statement对象
                    }
                } finally {
                    if (con != null) { // 当Connection对象的实例conn不为空时
                        con.close(); // 关闭Connection对象
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace(System.err); // 输出异常信息
        }
    }

}

View Code

2、main

 private static void mysqlOperator() {
           
        OraclePersionDao oracl = new OraclePersionDao();

        oracl.Add();
        oracl.Search();
        oracl.Update();
        oracl.Delete();

    }

View Code

3、增加oracle驱动到本项目

找到安装oracle的目录x:\\oracle\\product\\10.2.0\\db_1\\jdbc\\lib\\ojdbc14.jar  (注，不同版本会有不同名称）

复制该文件，点击WEB-INFO，Ctrl+v粘贴文件，点OKOKOK

右键粘贴的文件，Add  as library 一直点OK。，

3、测试