JDBC流程：六步

[java] view plain copy

1. import java.sql.Connection;

2. import java.sql.DriverManager;

3. import java.sql.ResultSet;

4. import java.sql.SQLException;

5. import java.sql.Statement;

6. import java.util.logging.Level;

7. import java.util.logging.Logger;

9. public class UseJdbc {

10.

11. public void Jdbc() {

12. try {

13. Class.forName("com.mysql.cj.jdbc.Driver");//加载驱动程序

14. System.out.println("Ok");

15. //建立连接

16. Connection connection = DriverManager.getConnection("jdbc:mysql://localhost/Contacts?serverTimezone=UTC", "root", "Cc229654512");

17. System.out.println("Database connected");

18. //创建语句

19. Statement statement = connection.createStatement();

20. //用executeQuery执行SQL查询语句

21. ResultSet resultSet = statement.executeQuery("select Name, PhoneNumber, Email, QQ, Note from Contacts");

22. //获取并输出返回结果

23. while (resultSet.next()) {

24. System.out.println(resultSet.getString(1) + "\t" + resultSet.getString(2) + "\t" + resultSet.getString(3) + "\t" + resultSet.getString(4) + "\t"

25. + resultSet.getString(5));

26. }

27. //关闭连接

28. connection.close();

29. } catch (Exception ex) {

30. ex.printStackTrace();

31. }

32. }

33. }

[java] view plain copy

1. public void test_insert()

2. {

3. String driver="oracle.jdbc.driver.OracleDriver";

4. String url="jdbc:oracle:thin:@127.0.0.1:1521:orcl";//orcl为sid

5. String user="briup";

6. String password="briup";

7. Connection conn=null;

8. Statement stat=null;

9. try {

10. //1、注册驱动

11. Class.forName(driver);

12. //2、获取连接

13. conn= DriverManager.getConnection(url, user, password);

14. //System.out.println(conn);

15. //3、创建statement对象

16. stat=conn.createStatement();

17. //4、执行sql语句

18. String sql="insert into lover values(5,'suxingxing',to_date('21-9-2016','dd-mm-yyyy'))";

19. stat.execute(sql);

20. //System.out.println(stat.execute(sql));

21. //5、处理结果集,如果有的话就处理，没有就不用处理，当然insert语句就不用处理了

22. } catch (Exception e) {

23. e.printStackTrace();

24. }

25. finally{

26. //6、关闭资源

27. try {

28. if(stat!=null)stat.close();

29. } catch (SQLException e) {

30. e.printStackTrace();

31. }

32. try {

33. if(conn!=null)conn.close();

34. } catch (SQLException e) {

35. e.printStackTrace();

36. }

37. }

38. }

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