1. Spring 프레임워크의 이해
5. Spring Abstract API

2. Spring JDBC를 이용할 때 개발자들이 구현할 부분
Spring – Abstract API
Spring JDBC를 이용할 때 개발자들이 구현할 부분 작업
Spring JDBC
개발자
Connection 관리 O X
SQL
Statement 관리
ResultSet 관리
Row 데이터 추출
패러미터 선언
패러미터 Setting
트랜잭션 관리

3. Template Method Pattern
Spring – Abstract API
Template Method
Pattern

4. Spring – Abstract API

5. Spring – Abstract API public abstract class AbstractClass {
public void templateMethod() {
// .. 비지니스 로직 구현
operation1();
operation2(); }
protected abstract void operation1();
protected abstract void operation2();

6. Spring – Abstract API
public class ConcreteClassA extends AbstractClass {
protected void operation1() {
// TODO Auto-generated method stub }
protected void operation2() {

7. Spring – Abstract API
Template Method = IoC

8. Callback Class Callback Method
Spring – Abstract API
Callback Class
Callback Method

9. Spring – Abstract API
public interface RowCallbackHandler {
void processRow(ResultSet rs) throws SQLException; }

10. Spring – Abstract API
public void query(String sql, RowCallbackHandler callbackHandler)
throws JdbcSqlException {
Connection con = null;
PreparedStatement ps = null;
ResultSet rs = null;
try {
con = <code to get connection>
ps = con.prepareStatement (sql);
rs = ps.executeQuery();
while (rs.next()) {
callbackHandler.processRow(rs); }
rs.close();
ps.close();
} catch (SQLException ex) {
throw new JdbcSqlException("Couldn't run query [" + sql + "]", ex);
finally {
DataSourceUtils.closeConnectionIfNecessary(this.dataSource, con);

11. Spring – Abstract API
class StringHandler implements JdbcTemplate.RowCallbackHandler {
private List 1 = new LinkedList();
public void processRow(ResultSet rs)throws SQLException {
1.add(rs.getString(1)); }
public String[] getStrings() {
return (String[]) 1.toArray(new String[1.size()]);
StringHandler sh = new StringHandler();
jdbcTemplate.query("SELECT FORENAME FROM CUSTMR", sh);
String[] forenames = sh.getStrings();