PrimeFaces如何验证上传的文件名？ [英] PrimeFaces How to validate uploaded file name?

问题描述

是否有任何机构知道如何在PrimeFaces中使用验证消息将uploadFile进行验证？

查看：

 < p：fileUpload id =upload
 fileUploadListener =＃{fileBean.handleFileUpload}
 update =uploadsauto =truemultiple =trueskinSimple =true> 
 < p> < h：messages id =messages/>< / p> 
< / p：fileUpload> 
  

FileBean ：

 列表与LT; UploadedFile的> UPLOADEDFILES; 
 $ b $ public void handleFileUpload（FileUploadEvent event）{
 if（uploadedFiles == null）{
 uploadedFiles = new ArrayList<>（）; 
} 
 uploadedFiles.add（event.getFile（））; 
} 
  

uploadValidator.java

  @FacesValidator（uploadValidator）
 public class UploadValidator implements Validator {
 @Override $ b $ public void validate（FacesContext上下文，UIComponent组件，Object值）抛出ValidatorException {
 Part file =（Part）value; 
 FacesMessage message = null; 
 $ b $尝试{
 if（！file.getName（）。matches（\\w +））
 message = new FacesMessage（Wrong file name）; 
 if（message！= null&&！message.getDetail（）。isEmpty（））
（
 message.setSeverity（FacesMessage.SEVERITY_ERROR）; 
抛出新的ValidatorException（message）; 
} 
} catch（Exception ex）{
 throw new ValidatorException（new FacesMessage（ex.getMessage（）））; 
 
 
 
 
 
 $ b我需要检查是否已上传文件名是拉丁文Unicode，如果不是 - 显示用户消息错误的文件名。我的代码不起作用。 
 
 
谢谢。
解决方案
 
 
 
 
 
 
 
 > 
 
 
 entity.java  
 
 
  @NotEmpty（message ={validation.msg。 ）
 @NotBlank（message ={validation.msg.notBlank}）
 @Column（name =code，unique = true）
 private String code; 
  
和您的page.xhtml 
 < p：inputText id =code... /> 
< p：message for =code/> 
  
如果 p：inputText 是 NotEmpty 和 NotBlank 这些信息甚至不会进入实体级别，如果 p：inputText 是 NotEmpty 和 NotBlank 在您的managedBean中
 
 $ b   从您的ManagedBean   b $ b 
 page.xhtml  
 
 
 < p：messages id =msgsglobalOnly =trueshowDetail = trueclosable =true/> 
< p：inputText id =code... /> 
< p：commandButton ... actionListener =＃{managedBean.validate（）}update =：msgs/> 
  
和您的ManagedBean.java中的
 
 
 public void validate（）{
 ... 
 MyUtil.addErrorMessage（ERROR）; 
 ... 
 
 $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $你可以在< Primefaces邮件示例网站和咆哮信息也是一个很好的方法显示 Primefaces咆哮示例网站。
 
 
 
希望对你有帮助。  
Does any body know how to implement validation  with validation message to uploadFile in PrimeFaces? 

View: 
<p:fileUpload id="upload" 
fileUploadListener="#{fileBean.handleFileUpload}"
update="uploads" auto="true" multiple="true" skinSimple="true"> 
<f:validator validatorId="uploadValidator"/>
<p> <h:messages id="messages" /></p>
</p:fileUpload>
FileBean:
List<UploadedFile> uploadedFiles;

    public void handleFileUpload(FileUploadEvent event) {
        if (uploadedFiles == null) {
            uploadedFiles = new ArrayList<>();
        }
        uploadedFiles.add(event.getFile());
    }
uploadValidator.java 
@FacesValidator("uploadValidator")
public class UploadValidator implements Validator {
    @Override
    public void validate(FacesContext context, UIComponent component, Object value) throws ValidatorException {
        Part file = (Part) value;
        FacesMessage message=null;

        try {
            if (!file.getName().matches("\\w+"))
                message=new FacesMessage("Wrong file name");
            if (message!=null && !message.getDetail().isEmpty())
            {
                message.setSeverity(FacesMessage.SEVERITY_ERROR);
                throw new ValidatorException(message);
            }
        } catch (Exception ex) {
            throw new ValidatorException(new FacesMessage(ex.getMessage()));
        }
    }
}
I need to check if uploaded file name is on Latin Unicode and if not - show  user a message "Wrong file name." My code doesn't work. No message is displayed no matter the file name.

Thank you.
解决方案
There is many way's to make a message appear from your managedBean 

From your Entity 

entity.java 
@NotEmpty(message = "{validation.msg.notNull}")
@NotBlank(message = "{validation.msg.notBlank}")
@Column(name = "code", unique = true)
private String code;
and in your page.xhtml 
<p:inputText id="code" ...  />
<p:message for="code" />
The big + with this solution that if the p:inputText is NotEmpty and NotBlank  the informations doesn't even go to the entity level, and you don't have to make a condition to verify if the p:inputText is NotEmpty and NotBlank in your managedBean 

From your ManagedBean 

page.xhtml
<p:messages id="msgs" globalOnly="true" showDetail="true" closable="true"/>
<p:inputText id="code" ...  />
<p:commandButton  ... actionListener="#{managedBean.validate()}" update=":msgs"  />
and in your ManagedBean.java
public void validate(){
...
MyUtil.addErrorMessage("ERROR");
...
}
You can find the best example in the Primefaces messages example web site and the growl message is also a good way to show a message Primefaces growl example web site.

Hope that helped you. 

                        
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