我正在使用primefaces进行文件上传,我想找到这个文件上传到的位置,然后在控制台或网页上打印出来,我该怎么做
我知道要拨打我使用的位置:
#{user.fileText}
但我想知道确切的路径,如果可能,我该怎么做?
我的上传过滤器:
public class UploadFilter implements Filter {
private int sizeThreshold = -1;
private String repositoryPath;
public void init(FilterConfig config) throws ServletException {
repositoryPath = config.getInitParameter(
"com.corejsf.UploadFilter.repositoryPath");
try {
String paramValue = config.getInitParameter(
"com.corejsf.UploadFilter.sizeThreshold");
if (paramValue != null)
sizeThreshold = Integer.parseInt(paramValue);
}
catch (NumberFormatException ex) {
ServletException servletEx = new ServletException();
servletEx.initCause(ex);
throw servletEx;
}
}
public void destroy() {
}
public void doFilter(ServletRequest request,
ServletResponse response, FilterChain chain)
throws IOException, ServletException {
if (!(request instanceof HttpServletRequest)) {
chain.doFilter(request, response);
return;
}
HttpServletRequest httpRequest = (HttpServletRequest) request;
boolean isMultipartContent
= ServletFileUpload.isMultipartContent(httpRequest);
if (!isMultipartContent) {
chain.doFilter(request, response);
return;
}
DiskFileItemFactory factory = new DiskFileItemFactory();
if (sizeThreshold >= 0)
factory.setSizeThreshold(sizeThreshold);
if (repositoryPath != null)
factory.setRepository(new File(repositoryPath));
ServletFileUpload upload = new ServletFileUpload(factory);
try {
@SuppressWarnings("unchecked") List<FileItem> items
= (List<FileItem>) upload.parseRequest(httpRequest);
final Map<String, String[]> map = new HashMap<String, String[]>();
for (FileItem item : items) {
String str = item.getString();
if (item.isFormField())
map.put(item.getFieldName(), new String[] { str });
else
httpRequest.setAttribute(item.getFieldName(), item);
}
chain.doFilter(new
HttpServletRequestWrapper(httpRequest) {
public Map<String, String[]> getParameterMap() {
return map;
}
public String[] getParameterValues(String name) {
Map<String, String[]> map = getParameterMap();
return (String[]) map.get(name);
}
public String getParameter(String name) {
String[] params = getParameterValues(name);
if (params == null) return null;
return params[0];
}
public Enumeration<String> getParameterNames() {
Map<String, String[]> map = getParameterMap();
return Collections.enumeration(map.keySet());
}
}, response);
} catch (FileUploadException ex) {
ServletException servletEx = new ServletException();
servletEx.initCause(ex);
throw servletEx;
}
}
}
答案 0 :(得分:0)
使用<p:fileUpload>
时,您根本不应该自制一个自定义过滤器。您到目前为止显示的自定义过滤器根本无法与<p:fileUpload>
组件正确交互。您应该使用PrimeFaces本身提供的过滤器。在documentation中清楚地解释了它是哪一个以及如何使用它。所以你需要这个过滤器:
<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>
</filter-mapping>
关于保存位置,您可以完全掌控自己。只需通过UploadedFile#getInputStream()
抓取bean(action)侦听器方法中的文件内容,然后将其写入您选择的位置。
你不应该对PrimeFaces存储它的地方感兴趣,它是一个临时位置,用于文件大于配置的阈值缓冲区大小的情况(因此将每隔一段时间自动清理/删除。)