如何從csv文件中獲取數據並使用mysql保存到grails中？

Question

例如： 我有一個CSV文件這樣

，我想它保存到database..with上傳CSV的文件。

這是我上傳CSV文件

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

編碼我在groovy..i混淆嘗試這樣的代碼，但沒有成功。

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

如何從文件CSV數據，並保存到mysql數據庫？

Answer 1

您需要從MultipartFile你傳遞as shown in the documentation:

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

然後得到InputStream的;

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()}") 
    } 
} 

Answer 2

你可以這樣做。

1. 使用Grails CSV插件上傳和解析CSV文件

plugins {  
     //TODO other plugins   
     compile(":csv:0.3.1") // add this entry in BuildConfig.groovy   
    } 

請確保您有在控制器/服務的CSV數據，在這裏你去

1. 控制器/服務使用低於邏輯

   //Read the CSV file data excluding the header  
   filecsv.inputStream.toCsvReader(['skipLines':1]).eachLine { tokens ->  
   //parse the csv columns 
   def name= tokens[0].trim() 
   def class= tokens[1].trim() 
   def age = tokens[2].trim() 
   def phone = tokens[3].trim() 
   
   //assign the csv column values to domain object 
   City city = new City() // this is your domain/table that you used to insert csv data 
   city.name = name 
   city.class = class 
   city.age = age 
   if(!city.save(validate: true)){ 
       city.errors.each { 
       log.debug(it) 
       } 
   } 
   

   }