Question

环境：

Primefaces 6.1
JavaEE 7
Wildfly 10
JSF 2.2

在选择文件后单击按钮时，文件var为空。

Test.xhtml

<!DOCTYPE html>
<html lang="en"
      xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://xmlns.jcp.org/jsf/html"
      xmlns:f="http://xmlns.jcp.org/jsf/core"
      xmlns:ui="http://xmlns.jcp.org/jsf/facelets"
      xmlns:p="http://primefaces.org/ui">
    <f:view contentType="text/html">
        <h:head>
            <title>Application</title>
        </h:head>

        <h:body>

            <h:form id="frmTest" enctype="multipart/form-data">
                <ui:include src="template/messages.xhtml" />
                <p:fileUpload fileUploadListener="#{fileUploadView.handleFileUpload}" mode="advanced" dragDropSupport="false"
       update="messages" sizeLimit="100000" fileLimit="3" allowTypes="/(\.|\/)(gif|jpe?g|png)$/" />
            </h:form>
        </h:body>
    </f:view>
</html>

TestBean.java

@ViewScoped
@ManagedBean
public class TestBean implements Serializable {
...
public void handleFileUpload(FileUploadEvent event) {
        UploadedFile file = event.getFile();//file is null
        FacesUtils.addInfoMessage("Succesful" + file.getFileName() + " is uploaded.");
        System.out.println("Succesful" + event.getFile().getFileName() + " is uploaded.");
}
...

Answer 1

您应该从update=""组件中删除或填充fileUpload属性。它在上传后将文件“重定向”到组件。

高级fileUpload使用Primefaces获取文件null

1 个答案: