struts实现文件上传功能

/* * Generated by MyEclipse Struts * Template path: templates/java/JavaClass.vtl */ package accp.struts.action; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.struts.action.Action; import org.apache.struts.action.ActionErrors; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import org.apache.struts.action.ActionMessage; import org.apache.struts.upload.FormFile; import accp.struts.form.HtmlFileForm; public class HtmlFileAction extends Action { public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { HtmlFileForm hff = (HtmlFileForm) form;// TODO Auto-generated method stub FormFile file=hff.getFile(); String fname=""; if(file.getFileSize()>0) { fname=file.getFileName(); int beginIndex=fname.indexOf("."); String fileType=fname.substring(beginIndex); if(fileType.equals(".jpg") || fileType.equals(".gif")) { try{ String savePath="E:\\SSH\\tagDemo2\\WebRoot\\upload"; InputStream streamIn=file.getInputStream();//从文件中读取流写入内存中 OutputStream streamOut=new FileOutputStream(savePath+"/"+fname);//把文件保存到制定路径 int bytesRead=0; byte[] buffer=new byte[8192]; bytesRead=streamIn.read(buffer,0,8192); while(bytesRead!=-1){//当读到最后一个字节的时候就不在写入硬盘了！也就跳出了循环 streamOut.write(buffer,0,bytesRead);//写入硬盘 bytesRead=streamIn.read(buffer,0,8192);//从内存中读取 } streamOut.close(); streamIn.close(); }catch(IOException io){ io.printStackTrace(); } String error="文件上传成功"; request.setAttribute("fname", fname); request.setAttribute("fileError", error); return mapping.findForward("showjpg"); }else { /*ActionErrors error=new ActionErrors(); ActionMessage message=new ActionMessage("文件类型不正确"); error.add("file",message);*/ String error="文件类型不对"; request.setAttribute("fileError", error); return mapping.findForward("htmlFile"); } }else { return mapping.findForward("htmlFile"); } } }