implementation 'org.springframework.boot:spring-boot-starter-jdbc'
runtimeOnly 'com.h2database:h2'
spring.datasource.url=jdbc:h2:tcp://localhost/~/test
spring.datasource.driver-class-name=org.h2.Driver
spring.datasource.username=sa
spring.datasource.username=sa를 꼭 추가해야한다. 그렇지 않으면 Wrong user name or password오류가 발생한다. 참고로 마지막에 공백이 들어가면 같은 오류가 발생한다. 공백주의..package hello.hellospring.repository;
import hello.hellospring.domain.Member;
import org.springframework.jdbc.datasource.DataSourceUtils;
import javax.sql.DataSource;
import java.sql.*;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
public class JdbcMemberRepository implements MemberRepository{
private final DataSource dataSource;
public JdbcMemberRepository(DataSource dataSource) {
this.dataSource = dataSource;
}
@Override
public Member save(Member member) {
String sql = "insert into member(name) values(?)";
Connection conn = null;
PreparedStatement pstmt = null;
ResultSet rs = null;
try {
conn = getConnection();
pstmt = conn.prepareStatement(sql,
Statement.RETURN_GENERATED_KEYS);
pstmt.setString(1, member.getName());
pstmt.executeUpdate();
rs = pstmt.getGeneratedKeys();
if (rs.next()) {
member.setId(rs.getLong(1));
} else {
throw new SQLException("id 조회 실패");
}
return member;
} catch (Exception e) {
throw new IllegalStateException(e);
} finally {
close(conn, pstmt, rs);
}
}
@Override
public Optional<Member> findById(Long id) {
String sql = "select * from member where id = ?";
Connection conn = null;
PreparedStatement pstmt = null; ResultSet rs = null;
try {
conn = getConnection();
pstmt = conn.prepareStatement(sql);
pstmt.setLong(1, id);
rs = pstmt.executeQuery();
if(rs.next()) {
Member member = new Member();
member.setId(rs.getLong("id"));
member.setName(rs.getString("name"));
return Optional.of(member);
} else {
return Optional.empty();
}
} catch (Exception e) {
throw new IllegalStateException(e);
} finally {
close(conn, pstmt, rs);
}
}
@Override
public List<Member> findAll() {
String sql = "select * from member";
Connection conn = null;
PreparedStatement pstmt = null;
ResultSet rs = null;
try {
conn = getConnection();
pstmt = conn.prepareStatement(sql);
rs = pstmt.executeQuery(); List<Member> members = new ArrayList<>();
while(rs.next()) {
Member member = new Member();
member.setId(rs.getLong("id"));
member.setName(rs.getString("name"));
members.add(member);
}
return members;
} catch (Exception e) {
throw new IllegalStateException(e);
} finally {
close(conn, pstmt, rs);
}
}
@Override
public Optional<Member> findByName(String name) {
String sql = "select * from member where name = ?";
Connection conn = null;
PreparedStatement pstmt = null;
ResultSet rs = null;
try {
conn = getConnection();
pstmt = conn.prepareStatement(sql);
pstmt.setString(1, name);
rs = pstmt.executeQuery();
if(rs.next()) {
Member member = new Member();
member.setId(rs.getLong("id"));
member.setName(rs.getString("name"));
return Optional.of(member);
} return Optional.empty();
} catch (Exception e) {
throw new IllegalStateException(e);
} finally {
close(conn, pstmt, rs);
}
}
private Connection getConnection() {
return DataSourceUtils.getConnection(dataSource);
}
private void close(Connection conn, PreparedStatement pstmt, ResultSet rs) {
try {
if (rs != null) {
rs.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
try {
if (pstmt != null) {
pstmt.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
try {
if (conn != null) {
close(conn);
}
} catch (SQLException e) {
e.printStackTrace();
}
}
private void close(Connection conn) throws SQLException {
DataSourceUtils.releaseConnection(conn, dataSource); }
}
package hello.hellospring;
import hello.hellospring.repository.JdbcMemberRepository;
import hello.hellospring.repository.MemberRepository;
import hello.hellospring.service.MemberService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.sql.DataSource;
@Configuration
public class SpringConfig {
private DataSource dataSource;
@Autowired
public SpringConfig(DataSource dataSource) {
this.dataSource = dataSource;
}
@Bean
public MemberService memberService() {
return new MemberService(memberRepository());
}
@Bean
public MemberRepository memberRepository() {
//return new MemoryMemberRepository();
return new JdbcMemberRepository(dataSource);
}
}
DataSource는 데이터베이스 커넥션을 획득할 때 사용하는 객체다. 스프링 부트는 데이터베이스 커넥션 정보를 바탕으로 DataSource를 생성하고 스프링 빈으로 만들어둔다. 그래서 DI를 받을 수 있다.