mysql - 如何从csv文件中获取数据并用mysql保存到grails中？

Question

例子:我有一个像这样的 CSV 文件

我希望将其保存到数据库中...并上传 CSV 文件。

这是我上传CSV文件的代码

<input type="file" name="filecsv"/>
<input type="button" class="upload" value="Upload 
             onclick='location.href ="${createLink(url: [action: 'upload'])}"'/>

我对 groovy 感到困惑..我试过像这段代码但没有成功。

    def upload = {
        println params.filecsv
    new File('filecsv').splitEachLine(',') {fields ->
    def city = new City(
        city: fields[0].trim(),
        description: fields[1].trim()
    )

    if (city.hasErrors() || city.save(flush: true) == null) {
        log.error("Could not import domainObject  ${city.errors}")
    }

    log.debug("Importing domainObject  ${city.toString()}")
}

Parse CSV and export into Mysql database in Grails

如何从文件CSV中获取数据并保存到数据库mysql中？

Answer 1

您需要从 MultipartFile 中获取 InputStream你通过了as shown in the documentation:

<g:uploadForm action="upload">
    <input type="file" name="filecsv" />
    <input type="submit" />
</g:uploadForm>

然后;

def upload = {
    request.getFile( 'filecsv' )
          .inputStream
          .splitEachLine(',') { fields ->
        def city = new City( city: fields[0].trim(),
                             description: fields[1].trim() )

        if (city.hasErrors() || city.save(flush: true) == null) {
            log.error("Could not import domainObject  ${city.errors}")
        }

        log.debug("Importing domainObject  ${city.toString()}")
    }
}