【发布时间】：2014-10-29 09:18:59
【问题描述】：
在我的应用程序中，我需要上传照片。我希望用户首先创建相册文件夹，然后单击该相册，然后上传照片。我的相册有：ID、album_name、用户名和我的照片：ID、album_ID、photo_name、类型
相册控制器：
import java.io.File
import grails.plugin.springsecurity.annotation.Secured
import java.text.SimpleDateFormat
@Secured(['ROLE_USER','ROLE_ADMIN', 'IS_AUTHENTICATED_FULLY'])
class AlbumController {
def springSecurityService
def index() { }
def create(){
def user = User.get(springSecurityService.currentUser.id)
def album = new Album()
album.a_name = params.name
album.user = user
album.save(failOnError:true)
def photo = new Photo()
def uploadedFile = request.getFile('myFile')
def name = System.currentTimeMillis()
if (uploadedFile.empty) {
flash.message = 'file cannot be empty'
redirect (action:'index')
return
}
photo.type = uploadedFile.contentType
photo.p_name = name
photo.album = album
uploadedFile.transferTo(new File("../test101111/web-app/album/" + user.username + "/"+ photo.getP_name() + ".jpg"))
//response.sendError(200, 'Done')
photo.save(failOnError:true)
redirect (action:'index')
}
}
照片控制器：
import java.io.File
import grails.plugin.springsecurity.annotation.Secured
import java.text.SimpleDateFormat
@Secured(['ROLE_USER','ROLE_ADMIN', 'IS_AUTHENTICATED_FULLY'])
class PhotoController {
def springSecurityService
def index() { }
def create(){
def photo = new Photo()
def uploadedFile = request.getFile('myFile')
def name = System.currentTimeMillis()
if (uploadedFile.empty) {
flash.message = 'file cannot be empty'
redirect (action:'index')
return
}
photo.type = uploadedFile.contentType
photo.p_name = name
photo.album = params.albumId
uploadedFile.transferTo(new File("../test101111/web-app/album/" + photo.getP_name() + ".jpg"))
//response.sendError(200, 'Done')
photo.save(failOnError:true)
redirect (action:'index')
}
}
照片查看：
<%@ page contentType="text/html;charset=UTF-8"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<meta name="layout" content="main" />
<title>Photo</title>
<script
src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script>
$(document).ready(function() {
$("span.button").click(function() {
$("form.forma_album").toggle();
});
});
</script>
</head>
<body>
<div class="body">
<div class="album_title">
<span class="title1">Fotografije</span>
<div class="new_album">
<img class="plus" src="${resource(dir: 'images', file: 'plus.png')}" />
<span class="button">Dodaj novu sliku</span>
</div>
</div>
<hr class="usual">
<g:uploadForm action="create" class="forma_album">
<input type="file" name="myFile" />
<input type="submit" />
</g:uploadForm>
</div>
</body>
</html>
相册视图：
<%@ page contentType="text/html;charset=UTF-8"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<meta name="layout" content="main" />
<title>Album</title>
<script
src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script>
$(document).ready(function() {
$("span.button").click(function() {
$("form.forma_album").toggle();
});
});
</script>
</head>
<body>
<div class="body">
<div class="album_title">
<span class="title1">Foto albumi</span>
<div class="new_album">
<img class="plus" src="${resource(dir: 'images', file: 'plus.png')}" />
<span class="button">Kreiraj novi album</span>
</div>
</div>
<hr class="usual">
<g:form action="create" class="forma_album">
<g:textArea class="album_name" name="name" placeholder="Ime albuma"></g:textArea>
<g:submitButton class="submit2" name="Dodaj" />
</g:form>
<g:each in="${albums}" var="album">
<g:link controller="photo" action="index" class="contact"
params="[albumId: album.id]">
${album.a_name}
</g:link>
</g:each>
<%--<g:uploadForm action="create" class="forma_album">
<g:textArea class="album_name" name="name" placeholder="Ime albuma"></g:textArea>
<input type="file" name="myFile" />
<input type="submit" />
</g:uploadForm>
--%>
<div>
<%--<g:each in="${albums}" var="album" class="picture">
<div class="picture">
<img src="${resource(dir: 'images', file: 'picture.png')}" />
<div class="album_name">
${album.a_name}
</div>
</div>
</g:each>
--%>
</div>
</div>
</body>
</html>
我的错误是：没有方法签名：org.springframework.security.web.servletapi.HttpServlet3RequestFactory$Servlet3SecurityContextHolderAwareRequestWrapper.getFile() 适用于参数类型：(java.lang.String) 值：[myFile] 可能的解决方案： getXML()、getPart(java.lang.String)、getAt(java.lang.String)、getAt(java.lang.String)、getLocale()、getJSON()
怎么了？对不起我的英语，谢谢你的回答；）
【问题讨论】：
-
与您的问题无关，但我想指出
def user = User.get(springSecurityService.currentUser.id)是多余的。 springSecurityService.currentUser 使用存储在安全主体中的 id 从数据库加载用户实例，然后您正在执行另一个查询以加载相同的实例。幸运的是，Hibernate 缓存了第一个 get() 调用并返回相同的实例，但您可以将代码更改为def user = springSecurityService.currentUser -
另外，当文件可能为空时（一旦您解决了当前问题），您为什么要保存相册？没有事务处于活动状态，也没有回滚，因此 save() 将存储额外的专辑实例。
标签： grails