webwork上传文件-白红宇

webwork上传文件

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发布时间：2019-05-10

本文共 10468 字，大约阅读时间需要 34 分钟。

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; charset=UTF-8"    pageEncoding="UTF-8"%>   <%@ taglib prefix="ww" uri="/webwork" %>   <%    String path = request.getContextPath();%>    Show case    
   
            upload:

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("errorimage",                              "Error:Invalid File Type");                       return "create";                    }                } catch (Exception e) {                    e.printStackTrace();                }             }               for (File fileImage : newFileImages) {                try {                                                        String imageName = fileImage.getName();                    fileIn = new FileInputStream(fileImage);                    filesize = fileIn.available();                      logger.info("获得文件名称: " + imageName);                    logger.info("获得文件大小：" + filesize);                      path=getProductFilePath();                    FileUtil.saveFile(fileImage, imageName,                           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
   
    0){      //对每个单元格进行循环      for(int k=0;k
    
     ");//      }  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