hutool工具
hutool工具
1. pom依赖
<!-- hutool依赖-->
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-all</artifactId>
<version>5.7.20</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>4.1.2</version>
</dependency>
浏览器格式
response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=utf-8");
String fileName = URLEncoder.encode("用户信息", "UTF-8");
response.setHeader("Content-Disposition", "attachment;filename=" + fileName + ".xlsx");
2. 导出接口
/**
* 导出接口
*/
@GetMapping("/export")
public void export(HttpServletResponse response) throws Exception {
// 从数据库查询出所有的数据
List<User> list = userService.list();
// 通过工具类创建writer 写出到磁盘路径
// ExcelWriter writer = ExcelUtil.getWriter(filesUploadPath + "/用户信息.xlsx");
// 在内存操作,写出到浏览器
ExcelWriter writer = ExcelUtil.getWriter(true);
//自定义标题别名
writer.addHeaderAlias("username", "用户名");
writer.addHeaderAlias("password", "密码");
writer.addHeaderAlias("nickname", "昵称");
writer.addHeaderAlias("email", "邮箱");
writer.addHeaderAlias("phone", "电话");
writer.addHeaderAlias("address", "地址");
writer.addHeaderAlias("createTime", "创建时间");
writer.addHeaderAlias("avatarUrl", "头像");
// 一次性写出list内的对象到excel,使用默认样式,强制输出标题
writer.write(list, true);
// 设置浏览器响应的格式
response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=utf-8");
String fileName = URLEncoder.encode("用户信息", "UTF-8");
response.setHeader("Content-Disposition", "attachment;filename=" + fileName + ".xlsx");
ServletOutputStream out = response.getOutputStream();
writer.flush(out, true);
out.close();
writer.close();
}
打开浏览器能下载Excel即成功。
文章来源:https://www.toymoban.com/news/detail-840877.html
3. 导入接口
/**
* excel 导入
* @param file
* @throws Exception
*/
@PostMapping("/import")
public Boolean imp(MultipartFile file) throws Exception {
InputStream inputStream = file.getInputStream();
ExcelReader reader = ExcelUtil.getReader(inputStream);
// 方式1:(推荐) 通过 javabean的方式读取Excel内的对象,但是要求表头必须是英文,跟javabean的属性要对应起来
// List<User> list = reader.readAll(User.class);
// 方式2:忽略表头的中文,直接读取表的内容
List<List<Object>> list = reader.read(1);
List<User> users = CollUtil.newArrayList();
for (List<Object> row : list) {
User user = new User();
user.setUsername(row.get(0).toString());
user.setPassword(row.get(1).toString());
user.setNickname(row.get(2).toString());
user.setEmail(row.get(3).toString());
user.setPhone(row.get(4).toString());
user.setAddress(row.get(5).toString());
user.setAvatarUrl(row.get(6).toString());
users.add(user);
}
userService.saveBatch(users);
return true;
}
3.1 测试:
通过postman测试,send之后返回true测试成功。
在Navicat刷新,可以看到新写入的数据。
文章来源地址https://www.toymoban.com/news/detail-840877.html
4. Vue导入
<el-upload action="http://localhost:9090/user/import" :show-file-list="false" accept="xlsx" :on-success="handleExcelImportSuccess" style="display: inline-block">
<el-button type="primary" class="ml-5">导入 <i class="el-icon-bottom"></i></el-button>
</el-upload>
handleExcelImportSuccess() {
this.$message.success("导入成功")
this.load()
}
5. Vue导出
<el-button type="primary" @click="exp" class="ml-5">导出 <i class="el-icon-top"></i></el-button>
exp() {
window.open("http://localhost:9090/user/export")
}
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