文件上传下载fileuploaddown

package com.chinasoft.action; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.Date; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionSupport; public class SaveFile extends ActionSupport { /** * */ private static final long serialVersionUID = -4303075894481781406L; private static final int BUFFER_SIZE = 16 * 1024; private File saveFile; private String saveFileFileName; private String saveFileContentType; public File getSaveFile() { return saveFile; } public void setSaveFile(File saveFile) { this.saveFile = saveFile; } public String getSaveFileFileName() { return saveFileFileName; } public void setSaveFileFileName(String saveFileFileName) { this.saveFileFileName = saveFileFileName; } public String getSaveFileContentType() { return saveFileContentType; } public void setSaveFileContentType(String saveFileContentType) { this.saveFileContentType = saveFileContentType; } /** * 复制文件 * @param src * @param dsc */ private static void copy(File src,File dsc){ InputStream in=null; OutputStream out=null; try { in=new BufferedInputStream(new FileInputStream(src),BUFFER_SIZE); out=new BufferedOutputStream(new FileOutputStream(dsc),BUFFER_SIZE); byte[] buffer=new byte[BUFFER_SIZE]; while(in.read(buffer)>0){ out.write(buffer); } } catch (Exception e) { e.printStackTrace(); }finally{ try { if(in!=null){ in.close(); } if(out!=null){ out.close(); } } catch (IOException e) { e.printStackTrace(); } } } /** * 获取文件的扩展名 * @param fileName * @return */ @SuppressWarnings("unused") private static String returnExtension(String fileName){ int pos=fileName.lastIndexOf("."); return fileName.substring(pos); } /** * 文件上传 * @return */ public String saveFile(){ this.saveFileFileName=new Date().getTime()+returnExtension(this.saveFileFileName); File filePath=new File(ServletActionContext.getServletContext().getRealPath("/uploadFiles"));//获取服务器路径，而不是本地路径 if(!filePath.exists()){ filePath.mkdir(); } File uploadFile=new File(filePath+"/"+this.saveFileFileName); copy(this.saveFile, uploadFile); return "success"; } public static void main(String[] args) { String string="abc.jps"; System.out.println(returnExtension(string)); } }