added updateUserInfo

src/dao/MemberDaoImpl.java

@@ -161,4 +161,28 @@ public class MemberDaoImpl implements MemberDao {
 			}
 		}
 	}
+
+	public void updateUserInfo(String email, String password, String changePassword) {
+		String table = "SELECT * FROM mytestdb.major_table";
+		String sql = "UPDATE mytestdb.major_table SET password=? WHERE  email=?";
+		PreparedStatement pstmt = null;
+		PreparedStatement pstmtTable = null;
+		try {
+			pstmtTable = conn.prepareStatement(table);
+			pstmt = conn.prepareStatement(sql);
+			ResultSet rs = pstmtTable.executeQuery();
+			while(rs.next()){
+				if (rs.getString("email").equals(email) && rs.getString(password).equals(password)){
+					pstmt.setString(1, changePassword);
+					pstmt.setString(2, email);
+					pstmt.executeUpdate();
+					System.out.println("수정된 이름: " + changePassword);
+					break;
+				}
+			}
+		} catch (SQLException e) {
+			e.printStackTrace();
+		}
+	}
+
 }
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