From affd7e9f1cc591be36102299cac45b35d9536a17 Mon Sep 17 00:00:00 2001
From: huliguo <2023611923@qq.com>
Date: 星期六, 12 七月 2025 15:08:49 +0800
Subject: [PATCH] stream流改for
---
src/main/java/com/linghu/controller/UserController.java | 153 +++++++++++++++++++++++++++------------------------
1 files changed, 81 insertions(+), 72 deletions(-)
diff --git a/src/main/java/com/linghu/controller/UserController.java b/src/main/java/com/linghu/controller/UserController.java
index adb5599..619e913 100644
--- a/src/main/java/com/linghu/controller/UserController.java
+++ b/src/main/java/com/linghu/controller/UserController.java
@@ -38,10 +38,7 @@
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.time.LocalDateTime;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Map;
-import java.util.Objects;
+import java.util.*;
import java.util.stream.Collectors;
@RestController
@@ -173,108 +170,120 @@
@PostMapping("/importUserExcel")
@ApiOperation("导入用户数据")
public ResponseResult importUserExcel(@RequestParam("file") MultipartFile file) {
- //查找出用户列表
- List<User> userList = userService.list();
- //名称
- Map<String, User> nameMap = userList.stream()
- .collect(Collectors.toMap(
- User::getUser_name, // Key映射
- excel -> excel, // Value映射
- (oldValue, newValue) -> oldValue // 键冲突处理（保留旧值）
- ));
-
- //查找出分组列表
- List<Sectionalization> list = sectionalizationService.list();
- //分组
- Map<String, Sectionalization> sectionalizationMap = list.stream()
- .collect(Collectors.toMap(
- Sectionalization::getSectionalization_name, // Key映射
- excel -> excel, // Value映射
- (oldValue, newValue) -> oldValue // 键冲突处理（保留旧值）
- ));
-
try {
- // 检查文件是否为空
+ // 1. 检查文件是否为空
if (file.isEmpty()) {
return ResponseResult.error("上传文件不能为空");
}
- // 使用自定义监听器读取数据（包含行号）
+
+ // 2. 读取数据库中已有的用户和分组，用于重复校验
+ // 2.1 已存在的用户（按用户名和邮箱分组）
+ List<User> userList = userService.list();
+ Map<String, User> userNameMap = userList.stream()
+ .collect(Collectors.toMap(
+ User::getUser_name,
+ user -> user, // 变量名修正为user（原excel变量名不合理）
+ (oldValue, newValue) -> oldValue // 重复用户名保留旧值
+ ));
+ Map<String, User> userEmailMap = userList.stream()
+ .collect(Collectors.toMap(
+ User::getUser_email,
+ user -> user,
+ (oldValue, newValue) -> oldValue // 重复邮箱保留旧值
+ ));
+
+ // 2.2 已存在的分组（按分组名称映射）
+ List<Sectionalization> sectionalizationList = sectionalizationService.list();
+ Map<String, Sectionalization> sectionMap = sectionalizationList.stream()
+ .collect(Collectors.toMap(
+ Sectionalization::getSectionalization_name,
+ section -> section,
+ (oldValue, newValue) -> oldValue
+ ));
+
+ // 3. 读取Excel数据（使用自定义监听器）
UserExcelListener listener = new UserExcelListener();
+ EasyExcel.read(file.getInputStream(), UserExcel.class, listener)
+ .sheet() // 读取第一个sheet
+ .doRead(); // 执行读取
- // 读取Excel数据
- EasyExcel.read(file.getInputStream())
- .head(UserExcel.class)
- .sheet()
- .doReadSync();
-
- // 数据转换与验证
- List<ExcelDataWithRow<UserExcel>> excelList = listener.getDataList();
+ // 4. 校验Excel数据并转换为User对象
+ List<ExcelDataWithRow<UserExcel>> excelDataList = listener.getDataList();
List<User> insertUserList = new ArrayList<>();
List<String> errorMessages = new ArrayList<>();
- List<String> emailList = new ArrayList<>();
- for (ExcelDataWithRow<UserExcel> excelData : excelList) {
+ Set<String> emailSet = new HashSet<>(); // 用于校验导入数据中的邮箱重复
+
+ for (ExcelDataWithRow<UserExcel> excelData : excelDataList) {
int rowNum = excelData.getRowNumber();
- UserExcel excel = excelData.getData();
+ UserExcel excelRowData = excelData.getData();
List<String> rowErrors = new ArrayList<>();
- // 检查必要字段
- if (!StringUtils.hasText(excel.getUser_name())) {
- rowErrors.add("用户名称不能为空");
+
+ // 4.1 校验必填字段
+ if (!StringUtils.hasText(excelRowData.getUser_name())) {
+ rowErrors.add("账户名不能为空");
+ } else if (userNameMap.containsKey(excelRowData.getUser_name())) {
+ rowErrors.add("账户名已存在（数据库中重复）");
}
- if (!StringUtils.hasText(excel.getUser_email())) {
+
+ if (!StringUtils.hasText(excelRowData.getUser_email())) {
rowErrors.add("邮箱不能为空");
- }else{
- if (emailList.contains(excel.getUser_email())) {
- rowErrors.add("导入数据中邮箱重复");
+ } else {
+ if (userEmailMap.containsKey(excelRowData.getUser_email())) {
+ rowErrors.add("邮箱已存在（数据库中重复）");
}
- if (nameMap.containsKey(excel.getUser_email())){
- rowErrors.add("邮箱与数据库中重复");
+ if (emailSet.contains(excelRowData.getUser_email())) {
+ rowErrors.add("邮箱重复（导入数据中重复）");
}
}
- if (!StringUtils.hasText(String.valueOf(excel.getPassword()))) {
+
+ if (!StringUtils.hasText(excelRowData.getPassword())) {
rowErrors.add("密码不能为空");
}
- if (!StringUtils.hasText(excel.getSectionalization_name())) {
- rowErrors.add("分组不能为空");
- }else if (!sectionalizationMap.containsKey(excel.getSectionalization_name())){
- rowErrors.add("分组不存在");
+ if (!StringUtils.hasText(excelRowData.getSectionalization_name())) {
+ rowErrors.add("账户分组不能为空");
+ } else if (!sectionMap.containsKey(excelRowData.getSectionalization_name())) {
+ rowErrors.add("账户分组不存在（数据库中无此分组）");
}
+ // 4.2 处理校验结果
if (!rowErrors.isEmpty()) {
- errorMessages.add(String.format("第%d行错误: %s", rowNum, String.join("；", rowErrors)));
- }else {
- // 构建Platform对象...
+ // 记录错误信息
+ errorMessages.add(String.format("第%d行：%s", rowNum, String.join("；", rowErrors)));
+ } else {
+ // 校验通过，转换为User对象
User user = new User();
- user.setUser_name(excel.getUser_name());
- user.setUser_email(excel.getUser_email());
- user.setPassword(excel.getPassword());
- user.setSectionalization_id(sectionalizationMap.get(excel.getSectionalization_name()).getSectionalization_id());
+ user.setUser_name(excelRowData.getUser_name());
+ user.setUser_email(excelRowData.getUser_email());
+ user.setPassword(excelRowData.getPassword()); // 实际场景建议加密存储
+ user.setSectionalization_id(sectionMap.get(excelRowData.getSectionalization_name()).getSectionalization_id());
user.setStatus("正常");
+
insertUserList.add(user);
- emailList.add(excel.getUser_email());
+ emailSet.add(excelRowData.getUser_email()); // 记录已添加的邮箱，用于去重
}
}
- // 处理错误
+
+ // 5. 处理错误或执行批量插入
if (!errorMessages.isEmpty()) {
- // 构建清晰的错误信息
+ // 组装错误信息
StringBuilder errorMsg = new StringBuilder();
- errorMsg.append("导入失败，共").append(errorMessages.size()).append("条数据存在错误：\n");
+ errorMsg.append("导入失败，共").append(errorMessages.size()).append("条数据有误：\n");
errorMessages.forEach(msg -> errorMsg.append(msg).append("\n"));
-
- return ResponseResult.error(400, errorMsg.toString());
+ return ResponseResult.error( errorMsg.toString());
+ } else {
+ // 批量插入数据库
+ userService.saveBatch(insertUserList);
+ return ResponseResult.success("导入成功，共新增" + insertUserList.size() + "条用户数据");
}
- // 开始添加
- userService.saveBatch(insertUserList);
- // 返回信息
- return ResponseResult.success();
- }
- catch (Exception e) {
- // 记录详细异常信息
- return ResponseResult.error("文件解析失败：" + e.getMessage());
+ } catch (Exception e) {
+ // 捕获异常（如文件格式错误、IO异常等）
+ return ResponseResult.error("导入失败：" + e.getMessage());
}
}
+
}
--
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