upload.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@taglib prefix="s" uri="/struts-tags"%>
<%
  String path = request.getContextPath();
  String basePath = request.getScheme() + "://"
      + request.getServerName() + ":" + request.getServerPort()
      + path + "/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

<title>上传</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">

</head>

<body>
  <div id="content">
    <div id="infowrap">
      <div id="box">
        <h3>上传Excel工资表</h3>
        <s:form action="file_upload" method="post"
          enctype="multipart/form-data" namespace='/file'>
          <s:file name="upload" label="上传的文件"></s:file>
          <s:submit value="上传"></s:submit>
          <s:hidden name="uploadPath" value="Files/salary"></s:hidden>
        </s:form>
      </div>
    </div>
  </div>
</body>
</html>

struts.xml 

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
    <constant name="struts.multipart.saveDir" value="/files"></constant>
    <package name="file" extends="struts-default" namespace="/file">
        <action name="file_*" method="{1}" class="edu.qdgxy.action.FileAction">
            <result name="upload">/pages/back/admin_frame.jsp</result>
        </action>
    </package>
</struts>

FileAction.java

package edu.qdgxy.action;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Vector;
import jxl.Cell;
import org.apache.struts2.ServletActionContext;
import edu.qdgxy.util.ExcelDele;
import edu.qdgxy.util.ExcelRead;

public class FileAction extends SuperAction{
  /**
   * 
   */
  private static final long serialVersionUID = 1L;
  private File upload;
  private String uploadFileName;
  private String uploadPath;
  public String upload() throws Exception{
    ExcelDele excelDele = new ExcelDele();  
    InputStream is=new FileInputStream(getUpload());
    System.out.println(uploadPath);
    String path=ServletActionContext.getServletContext().getRealPath(uploadPath);
    OutputStream os=new FileOutputStream(path+"/"+uploadFileName);

    byte buffer[]=new byte[1024];
    int cnt;
    while((cnt=is.read(buffer))>0){
      os.write(buffer,0,cnt);
    }
    os.close();
    is.close();

    pages="upload_success.jsp";
    request.put("pages",pages);

    return "upload";
  }
  public File getUpload() {
    return upload;
  }
  public void setUpload(File upload) {
    this.upload = upload;
  }
  public String getUploadFileName() {
    return uploadFileName;
  }
  public void setUploadFileName(String uploadFileName) {
    this.uploadFileName = uploadFileName;
  }

  public String getUploadPath() {
    return uploadPath;
  }
  public void setUploadPath(String uploadPath) {
    this.uploadPath = uploadPath;
  }
}