JDBC_Statement

插入数据

public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException, SQLException, NoSuchMethodException, InvocationTargetException, IOException {
        InputStream is = Jdbc_test.class.getClassLoader().getResourceAsStream("jdbc.propertise");
        Properties properties = new Properties();
        properties.load(is);
        String user = properties.getProperty("user");
        String password = properties.getProperty("password");
        String url = properties.getProperty("url");
        String driver = properties.getProperty("driver");
        Class.forName(driver);
        Connection conn = DriverManager.getConnection(url,user,password);
        Statement statement = conn.createStatement();
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入账户");
        String username = sc.next();
        System.out.println("请输入密码");
        String userpassword = sc.next();
        String sql = "insert into emp values(default,'"+username+"','"+userpassword+"')";
        statement.execute(sql);
        statement.close();
        conn.close();
    }

查询数据

public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException, SQLException, NoSuchMethodException, InvocationTargetException, IOException {
        //加载配置文件
        InputStream is = Jdbc_test.class.getClassLoader().getResourceAsStream("jdbc.propertise");
        Properties properties = new Properties();
        properties.load(is);
        String user = properties.getProperty("user");
        String password = properties.getProperty("password");
        String url = properties.getProperty("url");
        String driver = properties.getProperty("driver");
        //连接数据库
        Class.forName(driver);
        Connection conn = DriverManager.getConnection(url,user,password);
        //查询结果
        Statement statement = conn.createStatement();
        String sql = "select * from emp;"; //SQL查询语句
        ResultSet rs = statement.executeQuery(sql); //执行查询语句
        //打印结果
        while(rs.next()){
            System.out.println(rs.getString("user")+"    "+
                    rs.getString("password"));
        }
        //关闭对象
        rs.close();
        statement.close();
        conn.close();
    }