jdbc : select

jdbc/src/main/java/com/example/jdbc/repository/MemberRepositoryV0.java

@@ -1,9 +1,11 @@
-package com.example.jdbc.domain;
+package com.example.jdbc.repository;
 
 import com.example.jdbc.connection.DBConnectionUtil;
+import com.example.jdbc.domain.Member;
 import lombok.extern.slf4j.Slf4j;
 
 import java.sql.*;
+import java.util.NoSuchElementException;
 
 /**
  * JDBC - DriverManager 사용
@@ -32,6 +34,35 @@ public class MemberRepositoryV0 {
         }
     }
 
+    public Member findById(String memberId) throws SQLException {
+        String sql = "select * from member where member_id = ?";
+
+        Connection con = null;
+        PreparedStatement pstmt = null;
+        ResultSet rs = null;
+
+        try {
+            con = getConnection();
+            pstmt = con.prepareStatement(sql);
+            pstmt.setString(1, memberId);
+
+            rs = pstmt.executeQuery();
+            if (rs.next()) {
+                Member member = new Member();
+                member.setMemberId(rs.getString("member_id"));
+                member.setMoney(rs.getInt("money"));
+                return member;
+            } else {
+                throw new NoSuchElementException("member not found memberId=" + memberId);
+            }
+        } catch (SQLException e) {
+            log.error("db error", e);
+            throw e;
+        } finally {
+            close(con, pstmt, rs);
+        }
+    }
+
     private void close(Connection con, Statement stmt, ResultSet rs) {
 
         if (rs != null) {

jdbc/src/test/java/com/example/jdbc/domain/MemberRepositoryV0Test.java

@@ -1,19 +0,0 @@
-package com.example.jdbc.domain;
-
-import org.junit.jupiter.api.Test;
-
-import java.sql.SQLException;
-
-import static org.junit.jupiter.api.Assertions.*;
-
-class MemberRepositoryV0Test {
-
-    MemberRepositoryV0 repository = new MemberRepositoryV0();
-
-    @Test
-    void crud() throws SQLException {
-        Member member = new Member("memberV0", 10000);
-        repository.save(member);
-    }
-
-}

jdbc/src/test/java/com/example/jdbc/repository/MemberRepositoryV0Test.java

@@ -0,0 +1,28 @@
+package com.example.jdbc.repository;
+
+import com.example.jdbc.domain.Member;
+import lombok.extern.slf4j.Slf4j;
+import org.assertj.core.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import java.sql.SQLException;
+
+@Slf4j
+class MemberRepositoryV0Test {
+
+    MemberRepositoryV0 repository = new MemberRepositoryV0();
+
+    @Test
+    void crud() throws SQLException {
+        // save
+        Member member = new Member("memberV0", 10000);
+        repository.save(member);
+
+        // findById
+        Member findMember = repository.findById(member.getMemberId());
+        log.info("findMember={}", findMember);
+
+        Assertions.assertThat(findMember).isEqualTo(member);
+    }
+
+}