time|hutool时间开发
hutool时间操作类;获取当前时间;字符串和时间戳的格式转换等操作
hutool时间操作类;获取当前时间;字符串和时间戳的格式转换等操作
RuoYi-Vue
jdk1.8
SpringBoot 2.0
Hutool
Vue+Element UI
1.文件上传:(element-upload)
1.1 界面展示
<el-dialog :title="upload.title" :visible.sync="upload.open" :close-on-click-modal="false" width="400px" append-to-body>
<el-upload
ref="upload"
:limit="1"
accept=".xlsx, .xls"
:headers="upload.headers"
:action="upload.url + '?updateSupport=' + upload.updateSupport"
:disabled="upload.isUploading"
:on-progress="handleFileUploadProgress"
:on-success="handleFileSuccess"
:auto-upload="false"
drag
>
<i class="el-icon-upload"></i>
<div class="el-upload__text">
将文件拖到此处,或
<em>点击上传</em>
</div>
<div class="el-upload__tip" slot="tip">
<el-checkbox v-model="upload.updateSupport" />是否更新已经存在的代表品数据
<el-link type="info" style="font-size:12px" @click="importTemplate">下载模板</el-link>
</div>
<div class="el-upload__tip" style="color:#ff0000" slot="tip">提示:仅允许导入“xls”或“xlsx”格式文件!</div>
</el-upload>
<div slot="footer" class="dialog-footer">
<el-button type="primary" @click="submitFileForm">确 定</el-button>
<el-button @click="upload.open = false">取 消</el-button>
</div>
</el-dialog>
1.2
2.Excel文件解析(Hutool中的poi封装类ExcelReader)
@Log(title = "", businessType = BusinessType.EXPORT)
@PostMapping("/imports")
public AjaxResult imports(MultipartFile file, boolean updateSupport) throws Exception
{
//Workbook wb= WorkbookFactory.create(file.getInputStream());
InputStream inputStream = null;
try{
inputStream = file.getInputStream();
}catch (Exception e){
return ResponseData.fail(ResponseCodeEnum.ERROR_PARAM_INVALID);
}
ExcelReader excelReader = ExcelUtil.getReader(inputStream, "导入材料清单");
}
1.文件是如何上传的。
2.文件上传原理。
hutool创建定时任务有两种方式,一种是通过创建配置文件来进行定时任务的创建。另外一种是动态添加定时任务,这个方法加入的定时任务不会被写入到配置文件。
public class FileTest{
public static void main(String[] args) throws SQLException {
ExcelReader reader = ExcelUtil.getReader("/file.xlsx");
List<List<Object>> readAll = reader.read();
System.out.println(readAll.toString());
}
}
多文件文件存储位置: D盘
直接上代码:
public class FileTest{
public static void main(String[] args) throws SQLException {
File f = new File("D://temp/result/week");
for(File temp : f.listFiles()) {
if(temp.isFile()) {
System.out.println(temp.getName());
ExcelReader reader2= ExcelUtil.getReader(temp, 0);
List<Map<String,Object>> readAll2 = reader2.readAll();
for(Map<String,Object> map:readAll2){
Db.use().insert(
Entity.create("table")
.set("date_week", map.get("date"))
);
}
}
}
}
public static void readCsv(String[] args) throws SQLException, ParseException {
CsvReader reader = CsvUtil.getReader();
//从文件中读取CSV数据
CsvData data = reader.read(FileUtil.file("D://temp/2022.csv"));
List<CsvRow> rows = data.getRows();
int numbers=rows.size();
for (int i=1;i<numbers;i++) {
CsvRow csvRow=rows.get(i);
Db.use().insert(
Entity.create("table")
.set("year",csvRow.getRawList().get(0))
.set("month", csvRow.getRawList().get(0))
);
}
}
}
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