6주차 미션 / 서버 1조 김경민

src/main/java/core/dao/UserDao.java

@@ -36,12 +36,59 @@ public void insert(User user) throws SQLException {
     }
 
     public void update(User user) throws SQLException {
-        // TODO 구현 필요함.
+        Connection con = null;
+        PreparedStatement pstmt = null;
+        try {
+            con = ConnectionManager.getConnection();
+            String sql = "UPDATE USERS SET name = ?, email = ?, password = ?, WHERE userId = ?;";
+            pstmt = con.prepareStatement(sql);
+            pstmt.setString(4, user.getUserId());
+            pstmt.setString(3, user.getPassword());
+            pstmt.setString(1, user.getName());
+            pstmt.setString(2, user.getEmail());
+        } finally {
+            if (pstmt != null) {
+                pstmt.close();
+            }
+
+            if (con != null) {
+                con.close();
+            }
+        }
     }
 
     public List<User> findAll() throws SQLException {
-        // TODO 구현 필요함.
-        return new ArrayList<User>();
+        Connection con = null;
+        PreparedStatement pstmt = null;
+        ResultSet rs = null;
+        try {
+            ArrayList<User> users = new ArrayList<>();
+            con = ConnectionManager.getConnection();
+            String sql = "SELECT userId, password, name, email FROM USERS";
+            pstmt = con.prepareStatement(sql);
+
+            rs = pstmt.executeQuery();
+
+            while(rs.next()) {
+                User user = new User(
+                        rs.getString("userId"),
+                        rs.getString("password"),
+                        rs.getString("name"),
+                        rs.getString("email"));
+                users.add(user);
+            }
+            return users;
+        } finally {
+            if (rs != null) {
+                rs.close();
+            }
+            if (pstmt != null) {
+                pstmt.close();
+            }
+            if (con != null) {
+                con.close();
+            }
+        }
     }
 
     public User findByUserId(String userId) throws SQLException {