struts2 上传文件

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1. 随即生成路径的文件夹，属于共用方法

import java.io.File;public class UploadUtil {public static String makeDirs(String storeDirectory, String fileName) {int hashCode = fileName.hashCode();int dir1 = hashCode&0xf;int dir2 = (hashCode&0xf0)>>4;String newPath = dir1+"/"+dir2;File directory = new File(storeDirectory,newPath);if(!directory.exists())directory.mkdirs();newPath=storeDirectory+directory.separator+dir1+directory.separator+dir2;return newPath;}}

2 action 层

// 文件上传private File upload;private String uploadFileName;private String uploadContentType;private InputStream fileStream;private OutputStream out;

public String save(){  String storeDirectory=ServletActionContext.getServletContext().getRealPath("/file");try { fileStream = new FileInputStream(upload); String uri=UploadUtil.makeDirs(storeDirectory, uploadFileName); File f=new File(uri); if(f.exists()){ out=new FileOutputStream(uri+f.separator+uploadFileName); }  int len=-1; byte[] b=new byte[1024]; while((len=fileStream.read(b))!=-1){ out.write(b, 0, len); } model.setImage(uri); model.setImageurl(uploadFileName);  hbase.save(model);} catch (Exception e) {e.printStackTrace();}finally{if(fileStream!=null)try {fileStream.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}if(out!=null)try {out.close();} catch (IOException e) {e.printStackTrace();}}return SUCCESS;}

3.jsp 页面 (upload 要与action 的 private File upload; 名字保持一致 )

<tr><td>图片：<input type="file" name="upload"/><br/></td></tr>

4. 上传文件是sturts 的拦截器功能，自定拦截器或者使用默认的只要继承了 extends="struts-default" 即可。