如何在grails中将文件上传到远程FTP服务器 [英] How to upload file to remote FTP Server in grails

问题描述

我是Grails框架的新手。我需要通过Grails中的批量应用程序将文本文件上传到远程FTP服务器。请求如果有人有建议，一步一步的过程如何连接到远程服务器并上传文件。

预先致谢。

首先，在你的BuildConfig.groovy（Grails 2.x）或build.gradle（Grails 3.x）中包含commons-net：

b
$ b

compile'c​​ommons-net：commons-net：3.3' $ b

其次添加一个服务：

$ p $ class UploadService {
GrailsApplication grailsApplication

String upload（String fileName，InputStream inputStream）{
字符串状态
新FTPClient（）。带{
连接grailsApplication.config.getProperty（'ftp.host'）
登录grailsApplication.config.getProperty （'ftp.username'），grailsApplication.config.getProperty（'ftp.password'）
enterLocalPassiveMode（）
setFileType（BINARY_FILE_TYPE）
changeWorkingDirectory grailsApplic ation.config.getProperty（'ftp.uploadDir'）
storeFile（fileName，inputStream）
status = replyString
disconnect（）
}
返回状态


$ / code $

$ b

更新：



我忘了添加需要进入 grails-app / conf / Config.groovy （Grails 2.x）或 grails的配置-app / config / application.groovy ：

  ftp {
 host ='some .host'
 username ='myuser'
 password ='*****'
 uploadDir ='上传'
} 
  

也可以在 resources.groovy 中创建FTPClient（）实例并使用依赖关系而不是注射。

  bean = {
 ftpClient（FTPClient）
} 
  

然后在服务中使用：



  class UploadService {
 GrailsAppli阳离子grailsApplication 
 FTPClient ftpClient //将被注入
 
字符串上传（String fileName，InputStream inputStream）{
 
字符串状态
 ftpClient.with {
 //同上
} 
} 
} 
  

这将允许你对这个类进行单元测试，你只需简单地模拟出 FTPClient

I am new to Grails framework. I have a requirement to upload text file to remote FTP Server through batch application in Grails. Request if anyone has a suggestion, step by step process to how to connect to remote server and upload the file.

Thanks in advance.

解决方案

First, include commons-net in your BuildConfig.groovy (Grails 2.x) or build.gradle (Grails 3.x):

compile 'commons-net:commons-net:3.3'

Secondly add a service:

class UploadService {
    GrailsApplication grailsApplication

    String upload(String fileName, InputStream inputStream) {
        String status
        new FTPClient().with {
            connect grailsApplication.config.getProperty('ftp.host')
            login grailsApplication.config.getProperty('ftp.username'), grailsApplication.config.getProperty('ftp.password')
            enterLocalPassiveMode()
            setFileType(BINARY_FILE_TYPE)
            changeWorkingDirectory grailsApplication.config.getProperty('ftp.uploadDir')
            storeFile(fileName, inputStream)
            status = replyString
            disconnect()
        }
        return status
    }
}

Update:

I forgot to add the configuration that needs to go into grails-app/conf/Config.groovy (Grails 2.x) or grails-app/config/application.groovy:

ftp {
    host = 'some.host'
    username = 'myuser'
    password = '*****'
    uploadDir = 'Uploads'
}

It would also be possible to create the FTPClient() instance in resources.groovy and use dependency injection instead.

bean = {
    ftpClient(FTPClient)
}

and then have this in the service:

class UploadService {
     GrailsApplication grailsApplication
     FTPClient ftpClient // Will be injected

     String upload(String fileName, InputStream inputStream) {

         String status
         ftpClient.with {
              // Same as above
         }
     }
}

Which would allow you to unit-test the class, where you simply mock out FTPClient

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