我采取了不同的方法。我最初是为了显示上传的图像,但是如果Person
尚未创建,将其全部保留在客户端似乎是一个更好的主意。我发现这个问题并根据所选答案创建以下内容:
在我的头部包括html5shiv如果浏览器是IE且版本小于9为了兼容:
<h:outputText value="<!--[if lt IE 9]>" escape="false" />
<h:outputScript library="js" name="html5shiv.js" />
<h:outputText value="<![endif]-->" escape="false" />
要显示/上传图像,我有以下元素:
<p:fileUpload binding="#{upload}" mode="simple"
allowTypes="/(\.|\/)(gif|jpe?g|png)$/"
value="#{personBean.uploadedPicture}"/>
<p:graphicImage value="#" height="150" binding="#{image}" />
还有一些 JavaScript/jQuery 魔法:
function readPicture(input, output)
{
if (input.files && input.files[0])
{
var reader = new FileReader();
reader.onload = function(e)
{
output.attr('src', e.target.result);
};
reader.readAsDataURL(input.files[0]);
}
}
$("[id='#{upload.clientId}']").change(
function()
{
readPicture(this, $("[id='#{image.clientId}']"));
});
The uploadedPicture
属性现在是一个简单的属性:
@ManagedBean(name = "personBean")
@ViewScoped
public class PersonBean
{
private UploadedFile uploadedPicture;
public UploadedFile getUploadedPicture()
{
return uploadedPicture;
}
public void setUploadedPicture(UploadedFile uploadedPicture)
{
this.uploadedPicture = uploadedPicture;
}
}