webwork上传文件

在开源世界中，有两套比较有影响的API可供使用，一个是POI，一个是jExcelAPI。其中功能相对POI比较弱一点。但jExcelAPI对中文支持非常好，API是纯Java的， 并不依赖Windows系统，即使运行在Linux下，它同样能够正确的处理Excel文件。另外需要说明的是，这套API对图形和图表的支持很有限，而且仅仅识别PNG格式。

jxl.jar可以到 [url]http://sourceforge.net/project/showfiles.php?group_id=79926[/url]下载。

使用如下：

搭建环境

将下载后的文件解包，得到jxl.jar，然后和webwork运行所需要的所有包一并放入classpath，安装就完成了。

jsp代码（uploadFile.jsp）：
jsp页面其实很简单，就一个input框放在一个form表单里，请注意着色部分：
form标签务必脚上加上enctype="multipart/form-data，
<input type=file name=fileImages />中的file控件name名称需要和
FileUpload.java中的着色部分保持一致，
<%@ page language="java" contentType="text/html; cha rset=UTF-8"
    pageEncoding="UTF-8"%>
   <%@ taglib prefix="ww" uri="/webwork" %>
   <%
    String path = request.getContextPath();
%>



   


   

enctype="multipart/form-data">    
    upload: fileImages">  
   




java代码（FileUpload.java）：

package com;

import java.io.*;
import javax.servlet.http.HttpServletResponse;
import javax.swing.JFileChooser;

import jxl.Cell;
import jxl.Sheet;
import jxl.Workbook;
import jxl.read.biff.BiffException;

import org.apache.log4j.Logger;

import com.opensymphony.webwork.ServletActionContext;



public class FileUpload extends BaseAction1{
     /**
  *
  */
     private Logger logger = Logger.getLogger(FileUpload. class);
    
     private static final long serialVersionUID = 5943699833329252614L;

     // 对应中的file控件name名称
     private File[] fileImages;
    
     private File filepath;
    
     // 获取 文件名称 fileImages file 控件上传文件的文件名称；
     private String[] fileImagesFileName;
    FileInputStream fileIn;
     public String path;
     public String stringexcle;
     int filesize = 0;
     public FileInputStream getFileIn() {
   return fileIn;
    }

     public void setFileIn(FileInputStream fileIn) {
   this.fileIn = fileIn;
    }

     public int getFilesize() {
   return filesize;
    }

     public void setFilesize( int filesize) {
   this.filesize = filesize;
    }

     public String doUploadAction()  {

  File[] newFileImages = FileUtil.renameToFiles(fileImagesFileName,
               fileImages);
         if (newFileImages != null && newFileImages.length > 0) {
  
             for (File file : newFileImages) {
                 try {
                     if (!FileUtil.verifyFile(file, new String[] { "jpg", "gif",
                           "jpeg", "png" , "txt", "xls"})) {
                       this.addFieldError( "errorp_w_picpath",
                               "Error:Invalid File Type");
                       return "create";
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
             }
  
             for (File fileImage : newFileImages) {
                 try {
                    
                
                    String p_w_picpathName = fileImage.getName();
                    fileIn = new FileInputStream(fileImage);
                    filesize = fileIn.available();
  
                    logger.info( "获得文件名称: " + p_w_picpathName);
                    logger.info( "获得文件大小：" + filesize);
  
                    path=getProductFilePath();
                    FileUtil.saveFile(fileImage, p_w_picpathName,
                           getProductFilePath());
  
                    stringexcle=readExcel(fileImage);
                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                } catch (Exception e) {
                    e.printStackTrace();
                }
             }
         }
  
         return SUCCESS;

    }
    
     /**读取Excel文件的内容
  * @param file  待读取的文件
  * @return
  */
     public static String readExcel(File file){
  StringBuffer sb = new StringBuffer();
  
  Workbook wb = null;
   try {
       //构造Workbook（工作薄）对象
      wb=Workbook.getWorkbook(file);
  } catch (BiffException e) {
      e.printStackTrace();
  } catch (IOException e) {
      e.printStackTrace();
  }
  
   if(wb== null)
       return null;
  
   //获得了Workbook对象之后，就可以通过它得到Sheet（工作表）对象了
  Sheet[] sheet = wb.getSheets();
  
   if(sheet!= null&&sheet.length>0){
       //对每个工作表进行循环
       for( int i=0;i     //得到当前工作表的行数
     int rowNum = sheet[i].getRows();
     for( int j=0;j         //得到当前行的所有单元格
        Cell[] cells = sheet[i].getRow(j);
         if(cells.length>0){
       //对每个单元格进行循环
       for( int k=0;k           //读取当前单元格的值
          String cellValue = cells[k].getContents();
          sb.append(cellValue+ "\t");
      }
        }
        sb.append( "\r\n");
    }
    sb.append( "\r\n");
      }
  }
   //最后关闭资源，释放内存
  wb.close();
   return sb.toString();
    }

    
     //得到文件路径  
     public File getSelectedFile()
    {
    JFileChooser jfc = new JFileChooser();
    
     int returnVal = jfc.showSaveDialog( null);
     //得出文件路径
     if(returnVal == JFileChooser.APPROVE_OPTION )
    {
  System.out.println( "The path of the files:"+jfc.getSelectedFile().getName());
  
    }
     return jfc.getSelectedFile();
    }
     public void searchAction(){
  HttpServletResponse response = ServletActionContext.getResponse();
  response.setContentType( "text/html;charset=utf-8");
  PrintWriter out;
  String fileImages = ServletActionContext.getRequest().getParameter( "fileImages"); //从JSP页面拿值
//  String[] fileImages=null;
  System.out.println(fileImages);
   try {
      out = ServletActionContext.getResponse().getWriter();
//      for(int i=0;i
        out.println( "");
//      }
  out.flush();
  out.close();
  } catch (IOException e) {
       // TODO Auto-generated catch block
      e.printStackTrace();
  }
    }
    
     public File[] getFileImages() {
   return fileImages;
    }

     public void setFileImages(File[] fileImages) {
   this.fileImages = fileImages;
    }

     public String[] getFileImagesFileName() {
   return fileImagesFileName;
    }

     public void setFileImagesFileName(String[] fileImagesFileName) {
   this.fileImagesFileName = fileImagesFileName;
    }

     public String getPath() {
   return path;
    }

     public void setPath(String path) {
   this.path = path;
    }

     public File getFilepath() {
   return filepath;
    }

     public void setFilepath(File filepath) {
   this.filepath = filepath;
    }

     public String getStringexcle() {
   return stringexcle;
    }

     public void setStringexcle(String stringexcle) {
   this.stringexcle = stringexcle;
    }
}

FileUtil.java:

package com;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class FileUtil {
  
     // 重命名文件；
     public static File[] renameToFiles(String[] fileNames, File[] files) {
       File[] retFiles = null;
       if (fileNames != null && fileNames.length > 0) {
           retFiles = new File[fileNames.length];

           for ( int i = 0, n = fileNames.length; i < n; i++) {
              File dist = new File(fileNames[i]);
              files[i].renameTo(dist);
              retFiles[i] = dist;
           }
       }
       return retFiles;
    }

     // save文件
     public static long saveFile(File file, String fileName, String filePath)
           throws Exception {
       if (file == null) {
           return 0;
       }

       File filepath = new File(filePath);
       if (!filepath.isDirectory())
           filepath.mkdirs();
       File filedesc = new File(filepath, fileName);

       return copyFile(file, filedesc);
    }

     // copy文件
     public static long copyFile(File fromFile, File toFile) {
       long len = 0;

       InputStream in = null;
       OutputStream out = null;
       try {
           in = new FileInputStream(fromFile);
           out = new FileOutputStream(toFile);
           byte[] t = new byte[1024];
           int ii = 0;
           while ((ii = in.read(t)) > 0) {
              out.write(t, 0, ii);
              len += ii;
           }

       } catch (IOException e) {
           e.printStackTrace();

       } finally {
           if (in != null) {
               try {
                  in.close();
              } catch (Exception e) {
                  e.printStackTrace();
              }
           }

           if (out != null) {
               try {
                  out.close();
              } catch (Exception e) {
                  e.printStackTrace();
              }
           }

       }

       return len;
    }

     // 验证文件正确;
     public static boolean verifyFile(File file, String[] exts) throws Exception {
       boolean flag = false;
       if (file != null) {
           String ext = getExtension(file.getName());
           if (ext == null) {
               return false;
           }
           if (exts != null && exts.length > 0) {

               if (exts[0].equals( "*.*"))
                   return true;
               for ( int i = 0; i < exts.length; i++) {

                   if (ext.equalsIgnoreCase(exts[i])) {
                     flag = true;
                     break;
                  }
              }
           }
       }

       return flag;

    }

     // 取得文件扩展;
     public static String getExtension(String fileName) {

       int newEnd = fileName.length();
       int i = fileName.lastIndexOf('.', newEnd);
       if (i != -1) {
           return fileName.substring(i + 1, newEnd);
       } else {
           return null;
       }
    }
}

BaseAction1.java:

package com;

import java.io.File;

import com.opensymphony.xwork.ActionSupport;

public class BaseAction1 extends ActionSupport {
  
     private static final long serialVersionUID = -2796680436059696842L;

     private static final String FILE_PATH = "d:/upload/";   // 文件realpath;

     public String getProductFilePath() {
       File filesPath = new File(FILE_PATH);
       if (!filesPath.exists()) { // (canRead()
           filesPath.mkdirs(); // mkdirs()

       }
       return FILE_PATH;
    }

}

webwork.properties

# 保存的目录缺省使用 javax.servlet.context.tempdir
webwork.multipart.saveDir= javax.servlet.context.tempdir
webwork.multipart.maxSize=102400000

# 文件上传设置
# 用来处理HTTP POST请求,编码使用MIME-type multipart/form-data方式的
webwork.multipart.parser=jakarta

# 指定locale,编码
webwork.i18n.encoding=UTF-8
webwork.custom.i18n.resources=messages,acl,definition

# 开发模式设定
webwork.devMode = false

# 配置自动更新设定
webwork.configuration.xml.reload=true

# 国际化资源设定
webwork.i18n.reload=true

xwork.xml:

xml version ="1.0" encoding ="UTF-8" ?>

< xwork >
     < include file ="webwork-default.xml" />
    
    
     < include file ="xwork_upload.xml" />
xwork >

xwork_upload.xml:

xml version ="1.0" encoding ="UTF-8" ?>

< xwork >
     < package name ="upload" extends ="webwork-default" namespace ="/upload" >

       < interceptors >
           < interceptor name ="upload"
               class ="com.opensymphony.webwork.interceptor.FileUploadInterceptor" >
               < param name ="maximumSize" >10000000 param >
           interceptor >
           < interceptor-stack name ="uploadStack" >
               < interceptor-ref name ="upload" />
               < interceptor-ref name ="defaultStack" />
           interceptor-stack >
       interceptors >
       < default-interceptor-ref name ="WSStack" />

       < action name ="doUpload"
           class ="com.FileUpload" method ="doUploadAction" >
           < interceptor-ref name ="params" />
           < interceptor-ref name ="basicStack" />
           < interceptor-ref name ="uploadStack" />
           < result name ="success" >
               < param name ="location" >/success.jsp param >
           result >
       action >
     package >
xwork >

success.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%
    String path = request.getContextPath();
%>
< !DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd" >
< %@ taglib uri ="/webwork" prefix ="ww" % >
< html >
< head >
< meta http-equiv ="Content-Type" content ="text/html; charset=UTF-8" >
     < title >Showcase title>
head>

< body >
< h1 >Fileupload sample h1>
     < ul >
         < li >ContentType: < ww:property value ="filesize" /> li>
         < li >FileName: < ww:property value ="path" /> li>
         < li >File: < ww:property value ="filepath" /> li>
     ul>
body>
html>