JUntil单元测试

注解介绍：
1. @Before
在测试方法运行前运行
2. @After
在测试方法运行后运行
3. @Test
可以进行测试的方法

public class JUntil {
    Connection connection;
    PreparedStatement preparedStatement;

    @BeforeEach
    public void init() throws ClassNotFoundException, SQLException {
        Class.forName("com.mysql.jdbc.Driver");
        String url = "jdbc:mysql://localhost:3306/scott?useUnicode=true&characterEncoding=UTF-8";
        connection = DriverManager.getConnection(url,"root","root");
    }

    @Test
    public void test_update() throws SQLException {
        preparedStatement = connection.prepareStatement("update sort set sname= ? where sid = ?");
        Scanner scanner = new Scanner(System.in);
        scanner.next();
        preparedStatement.setString(1,"手机");
        preparedStatement.setInt(2,7);
        preparedStatement.executeUpdate();
    }
    
    @AfterEach
    public void after(){
        System.out.println("所有测试以后");
    }
}