笑傲Java面试：面霸修炼手册
16lz
2021-03-23
笑傲Java面试：面霸修炼手册
©著作权归作者所有：来自51CTO博客作者mb5fdf56b9cf058的原创作品，如需转载，请注明出处，否则将追究法律责任V：ititit111222333
package com.tarzan.recommend.Service;import com.tarzan.recommend.dto.ItemDTO;import com.tarzan.recommend.dto.RelateDTO;import com.tarzan.recommend.dto.UserDTO;import lombok.Data;import lombok.extern.slf4j.Slf4j;import org.assertj.core.util.Lists;import org.springframework.util.ResourceUtils;import java.io.*;import java.nio.charset.StandardCharsets;import java.util.List;@Data@Slf4jpublic class FileDataSource { public final static String folderPath="F:\\ml-100k"; /** * 方法描述: 读取基础数据 * * @param * @Return {@link List< RelateDTO>} * @throws * @author tarzan * @date 2020年07月31日 16:53:40 */ public static List<RelateDTO> getData() { List<RelateDTO> relateList = Lists.newArrayList(); try { FileInputStream out = new FileInputStream(folderPath+"\\u.data"); InputStreamReader reader = new InputStreamReader(out, StandardCharsets.UTF_8); BufferedReader in = new BufferedReader(reader); String line = null; while ((line = in.readLine()) != null) { String newline = line.replaceAll("[\t]", " "); String[] ht = newline.split(" "); Integer userId = Integer.parseInt(ht[0]); Integer movieId = Integer.parseInt(ht[1]); Integer rating = Integer.parseInt(ht[2]); RelateDTO dto = new RelateDTO(userId, movieId, rating); relateList.add(dto); } } catch (IOException e) { log.error(e.getMessage()); } return relateList; } /** * 方法描述: 读取用户数据 * * @param * @Return {@link List< UserDTO>} * @throws * @author tarzan * @date 2020年07月31日 16:54:51 */ public static List<UserDTO> getUserData() { List<UserDTO> userList = Lists.newArrayList(); try { FileInputStream out = new FileInputStream(folderPath+"\\u.user"); InputStreamReader reader = new InputStreamReader(out, StandardCharsets.UTF_8); BufferedReader in = new BufferedReader(reader); String line = null; while ((line = in.readLine()) != null) { String newline = line.replaceAll("[\t]", " "); String[] ht = newline.split("\\|"); Integer id = Integer.parseInt(ht[0]); Integer age = Integer.parseInt(ht[1]); String sex = ht[2]; String profession = ht[3]; String postcode = ht[4]; UserDTO dto = new UserDTO(id, age, sex, profession, postcode); userList.add(dto); } } catch (IOException e) { log.error(e.getMessage()); } return userList; } /** * 方法描述: 读取电影数据 * * @param * @Return {@link List< ItemDTO>} * @throws * @author tarzan * @date 2020年07月31日 16:54:22 */ public static List<ItemDTO> getItemData() { List<ItemDTO> itemList = Lists.newArrayList(); try { FileInputStream out = new FileInputStream(folderPath+"\\u.item"); InputStreamReader reader = new InputStreamReader(out, StandardCharsets.UTF_8); BufferedReader in = new BufferedReader(reader); String line = null; while ((line = in.readLine()) != null) { String newline = line.replaceAll("[\t]", " "); String[] ht = newline.split("\\|"); Integer id = Integer.parseInt(ht[0]); String name = ht[1]; String date = ht[2]; String link = ht[3]; ItemDTO dto = new ItemDTO(id, name, date, link); itemList.add(dto); } } catch (IOException e) { log.error(e.getMessage()); } return itemList; }}
更多相关文章
- Mybatis【2.1】-- 从读取流到创建SqlSession发生了什么？
- 位置不可用无法访问磁盘结构损坏且无法读取 chkdsk无法修复. 不
- 如何从io.Reader 中读数据
- linux系统执行读取jar包同级目录的外部配置文件
- 循环单链表及常用操作（C语言描述）
- Spark Core读取ES的分区问题分析
- Unity3D直接从Zip中读取文本数据
- 当年pass到很多扒手的题
- 嵌入式开发，各类存储方式知多少？