Single File Upload

File Upload

Preparing files

1. Upload a single file page

<%@ page language= "java" import= "java.util.*" pageencoding= "utf-8"%><%string path = Request.getcontextpath () ; String basepath = request.getscheme () + "://" +request.getservername () + ":" +request.getserverport () +path+ "/";%> <%@ taglib prefix= "s" uri= "/struts-tags"%><! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" >
2. Configure the appropriate action in the Struts.xml
<action name = "Upload" class= "action. Uploadaction ">        <!--to save the directory by param parameter settings--        <param name=" Savepath ">/image</param>        <result name= "Success" >/upload_success.jsp</result>    </action>
3. Find the corresponding class based on the action node
Package Action;import Java.io.file;import Java.io.fileinputstream;import java.io.fileoutputstream;import Org.apache.struts2.servletactioncontext;import Com.opensymphony.xwork2.actionsupport;public class UploadAction    Extends actionsupport{//encapsulate the properties of the uploaded files private file upload;    The type of the encapsulated upload file private String uploadcontenttype;        Encapsulates the name of the uploaded file private String uploadfilename;    Public File Getupload () {return upload;    } public void Setupload (File upload) {this.upload = upload;    } public String Getuploadcontenttype () {return uploadcontenttype;    } public void Setuploadcontenttype (String uploadcontenttype) {this.uploadcontenttype = Uploadcontenttype;    } public String Getuploadfilename () {return uploadfilename;    } public void Setuploadfilename (String uploadfilename) {this.uploadfilename = Uploadfilename;    } public void Setsavepath (String savepath) {this.savepath = Savepath; }//Get file upload path to PRIVate String Savepath;            @Override public String Execute () throws Exception {//create cache array byte [] buffer =new byte[1024];                Read file FileInputStream fis =new fileinputstream (Getupload ());                Save the file and set the path to save the directory FileOutputStream fos =new fileoutputstream (Getsavepath () + "\ \" +this.getuploadfilename ());                int length =fis.read (buffer);                    while (length>0) {//writes Fos.write (buffer,0,length) for length of each write;                Length=fis.read (buffer);                } fis.close ();                Fos.flush ();        Fos.close ();    return SUCCESS;    Public String Getsavepath () {return Servletactioncontext.getservletcontext (). Getrealpath (Savepath); }}
4. If successful, find a success page
<%@ page language= "java" import= "java.util.*" pageencoding= "utf-8"%><%string path = Request.getcontextpath () ; String basepath = request.getscheme () + "://" +request.getservername () + ":" +request.getserverport () +path+ "/";%> <%@ taglib prefix= "s" uri= "/struts-tags"%><! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" >
　　
Single File Upload