The document discusses different ways to implement a converter class that interacts with business logic code. It mentions creating a StringBuilder and appending a string. It also shows creating a database table with columns for ID, username, and password. The main point is that the business logic interacts with a converter interface, and different implementations of the converter interface can be used depending on the needs, such as an original converter class or an Oracle converter class.

9. App StringBuilder String
System

10. StringBuilder#append(String)
App

14. foo
StringBuilder
System.out.println(quot;Miyamoto Daisukequot;);
StringBuilder

20. CREATE TABLE T_USER (
ID INTEGER,
USERNAME VARCHAR(32),
PASSWORD VARCHAR(32)
);

23. BL Converter
public class OriginalConverter implements Converter
public class OracleConverter implements Converter

25. BL Converter

26. BusinessLogic
Converter
converter

29. Main BusinessLogic Converter

30. BusinessLogic
Converter
BusinessLogic
BL

31. BusinessLogic
OriginalConverter

38. getComponent(quot;businessLogicquot;)

39. BusinessLogic
Converter
Converter
OracleConverter