Question

我使用JSF2.1和primefaces来上传文件。在我的应用程序中，我必须在创建记录时动态添加文件。但是当我使用时我无法在保存期间编写用于上传文件的代码。我希望仅在保存时上传文件，而不是在上传期间上传。任何人都可以帮我解决如何实现这个

public String handleFileUpload(FileUploadEvent event) throws IOException {  
    FacesMessage msg = new FacesMessage("Succesful", event.getFile().getFileName() + " is uploaded.");
    FacesContext.getCurrentInstance().addMessage(null, msg);  
    UploadedFile file = event.getFile();

    String prefix = FilenameUtils.getBaseName(file.getFileName());
    String suffix = FilenameUtils.getExtension(file.getFileName());


    String path = "C:/apache-tomcat-7.0.47/webapps/ROOT/WEB-INF/images";

     ExternalContext extContext = FacesContext.getCurrentInstance().getExternalContext();


    File fileToDirectory = File.createTempFile(prefix + "-", "." + suffix, new File(path));

    InputStream inputStream = event.getFile().getInputstream();
    String fileName = event.getFile().getFileName();

    OutputStream outputStream = new FileOutputStream(fileToDirectory);

    byte[] buffer = new byte[1024];

    int length;
    //copy the file content in bytes 
    while ((length = inputStream.read(buffer)) > 0){

        outputStream.write(buffer, 0, length);

    }

    inputStream.close();
    outputStream.close();
    return path+fileName;


}

我需要保存此代码，但在保存期间我无法获取事件

Answer 1

advanced mode无法做到这一点。请改用simple mode。然后，您可以直接将输入值绑定到UploadedFile属性。

E.g。

<h:form enctype="multipart/form-data">
    ...
    <p:fileUpload mode="simple" value="#{bean.file}" />
    ...
    <p:commandButton value="Save" action="#{bean.save}" ajax="false" />
</h:form>

与

private UploadedFile file; // +getter+setter

public void save() {
    // ...
}

如何使用命令按钮而不是上传按钮上传p：fileUpload的文件

1 个答案: