我想知道当我们使用primefaces并使用apache tomcat服务器上传文件时会发生什么。据我所知,在将其上传到系统之前,tomcat暂时存储在某个地方。如果上传成功,我们能否在该临时文件夹中看到?如果文件大小较大,则会抛出这样的错误。
SEVERE: Servlet.service() for servlet [Faces Servlet] in context with path [/maintenance] threw exception
java.io.IOException: Processing of multipart/form-data request failed. No space left on device
有任何帮助吗? 提前谢谢。
P.S我正在使用Unix
答案 0 :(得分:1)
我使用apache tomcat,这对我来说很好用:
表单必须为enctype="multipart/form-data
,并在web.xml
<context-param>
<param-name>primefaces.UPLOADER</param-name>
<param-value>commons</param-value>
</context-param>
<filter>
<filter-name>PrimeFaces FileUpload Filter</filter-name>
<filter-class>org.primefaces.webapp.filter.FileUploadFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>PrimeFaces FileUpload Filter</filter-name>
<servlet-name>Faces Servlet</servlet-name>
<dispatcher>FORWARD</dispatcher>
</filter-mapping>
在xhtml文件中:
<h:form enctype="multipart/form-data" id="upload">
<p:fileUpload id="fileUpload" fileUploadListener="#{uploadParcelBean.handleFileUpload}" mode="advanced"
allowTypes="/(\.|\/)(gif|jpe?g|png|bmp|pdf|doc|docx|xls|xlsx|txt)$/"
description="Select File"
label="Select File" uploadLabel="Upload" cancelLabel="Cancel"
validatorMessage="Invalid Format."
dragDropSupport="true"
multiple="true"
update="growl fileList"
disabled="false"/>
</h:form>
在bean方面,您可以处理上传的文件:
public void handleFileUpload(FileUploadEvent event) {
try {
copyFile(event.getFile().getFileName(), event.getFile().getInputstream());
//other logics
}
catch(IOException e){
e.printStackTrace();
}
复制方法类似于:
public void copyFile(String fileName, InputStream in) {
String destination="C:\\uploads\\";
try {
// write the inputStream to a FileOutputStream
File theDir = new File(destination);
if(!theDir.exists())
{
try {
theDir.mkdir();
} catch (Exception e) {
e.printStackTrace();
}
}
OutputStream out = new FileOutputStream(new File(destination + fileName));
int read = 0;
byte[] bytes = new byte[1024];
while ((read = in.read(bytes)) != -1) {
out.write(bytes, 0, read);
}
in.close();
out.flush();
out.close();
} catch (IOException e) {
System.out.println(e.getMessage());
}
}