jsf myface t标签

jsf的Implementation有两个
Sun JSF Reference Implementation
和myface
?jsf 的t标签
你先要去 myfaces.apache.org 下个 jsf1.2 的实现包 myfaces-core-1.2.6-bin.zip
在下一个 tomahawk12-1.1.8-bin.zip  (这个应该是最新的吧。我用的是1.1.6。这个不行的话你试试其它的)
<%@taglib uri="http://myfaces.apache.org/tomahawk" prefix="t"%>
就可以用了。
里面可以用 <t:inputFileUpload> 这个上传组件

随机命名上传（解决上传文件含中文和同名会覆盖的问题）
1.UploaderHelper.java
package com.pp.util;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

import javax.faces.context.FacesContext;
import javax.servlet.http.HttpSession;

import org.apache.myfaces.custom.fileupload.UploadedFile;

public class UploaderHelper {
 public final static String uploadPath = "uploadFile";

 public static String uploadFileToDisk(UploadedFile myFile) {
  try {
   long time = System.currentTimeMillis();
   InputStream in = myFile.getInputStream();
   FacesContext ctx = FacesContext.getCurrentInstance();
   HttpSession hs = (HttpSession) ctx.getExternalContext().getSession(
     true);
   String directory = hs.getServletContext().getRealPath("//")
     + uploadPath;
   File fileDir = new File(directory);
   if (!fileDir.exists()) {
    fileDir.mkdir();
   }
   String fileName = String.valueOf(Thread.currentThread()
     .getContextClassLoader().hashCode())
     + "_"
     + time
     + myFile.getName().substring(
       myFile.getName().lastIndexOf("."));
   String file = hs.getServletContext().getRealPath("//") + uploadPath
     + "//" + fileName;
   BufferedOutputStream out = new BufferedOutputStream(
     new FileOutputStream(file));
   byte[] buffer = new byte[1024 * 2];
   int length;
   while ((length = in.read(buffer, 0, buffer.length)) > 0) {
    out.write(buffer, 0, length);
   }
   out.flush();
   out.close();
   return uploadPath + "/" + fileName;
   // return "//" + uploadPath+"//"+ fileName;
  } catch (Exception e) {
   e.printStackTrace();
  }
  return null;
 }
}

2使用
<%@ taglib uri="http://myfaces.apache.org/tomahawk" prefix="x"%>
<h:form id="addid" enctype="multipart/form-data">
<x:inputFileUpload id="fileId" value="#{picBean.myfile}" storage="file" onchange="showPic()"/>
<img id="picId" height="30 width="40" alt="显示图片" title="s"/>
picBean的add方法
private UploadedFile myfile;
// 上传图片和类型不能为空
  if (myfile != null) {
  String test = myfile.getContentType();
  if (!test.startsWith("image/")) {
    wrongpictype = "图片格式不对";
    return "";
   }
   String path=UploaderHelper.uploadFileToDisk(myfile);
   this.picnews.setTurl(path);

 

              <h:outputLabel value="#{pnBean.wrongpictype}"></h:outputLabel>