Struts2(多)文件上传和下载使用示例-阿里云开发者社区

[java]view plaincopyprint? 
    
 /**  
  * Struts2Test  
  * 使用Struts2上传文件  
  */   
 package com.labci.struts2.action;   
 import java.io.File;   
 import java.io.FileInputStream;   
 import java.io.FileOutputStream;   
 import java.util.ArrayList;   
 import java.util.Arrays;   
 import java.util.List;   
 import javax.servlet.http.HttpServletRequest;   
 import org.apache.struts2.interceptor.ServletRequestAware;   
 import com.opensymphony.xwork2.ActionSupport;   
 /**  
  * @author Bill Tu(tujiyue/iwtxokhtd)  
  * Jun 8, 2011[8:31:01 PM]  
  *  
  */   
 public class UploadFileAction extends ActionSupport implements   
         ServletRequestAware {   
     /**  
      *   
      */   
     private static final long serialVersionUID = -1896915260152387341L;   
     private HttpServletRequest request;   
     public void setServletRequest(HttpServletRequest req) {   
         this.request=req;   
     }   
        
        
     private List<File> fileName;//这里的"fileName"一定要与表单中的文件域名相同   
     private List<String> fileNameContentType;//格式同上"fileName"+ContentType   
     private List<String> fileNameFileName;//格式同上"fileName"+FileName   
     private String savePath;//文件上传后保存的路径   
     private String allowTypes;//允许上传的文件类型   
        
     public List<File> getFileName() {   
         return fileName;   
     }   
    
     public void setFileName(List<File> fileName) {   
         this.fileName = fileName;   
     }   
    
     public List<String> getFileNameContentType() {   
         return fileNameContentType;   
     }   
    
     public void setFileNameContentType(List<String> fileNameContentType) {   
         this.fileNameContentType = fileNameContentType;   
     }   
    
     public List<String> getFileNameFileName() {   
         return fileNameFileName;   
     }   
    
     public void setFileNameFileName(List<String> fileNameFileName) {   
         this.fileNameFileName = fileNameFileName;   
     }   
    
     @SuppressWarnings("deprecation")   
     public String getSavePath() {   
         return request.getRealPath(savePath);   
     }   
    
     public void setSavePath(String savePath) {   
         this.savePath = savePath;   
     }   
     public String getAllowTypes() {   
         return allowTypes;   
     }   
    
     public void setAllowTypes(String allowTypes) {   
         this.allowTypes = allowTypes;   
     }   
        
     @Override   
     public String execute() throws Exception {   
         //得到文件的类型   
         List<String> fileTypes=getFileNameContentType();   
         String []allowTypes=getAllowTypes().split(",");   
         List<String> typesList=Arrays.asList(allowTypes);   
            
         boolean allowFlag=true;//是否存在不允许上传的文件类型   
         for(String type:fileTypes){   
             if(!typesList.contains(type)){   
                 allowFlag=false;   
                 break;   
             }   
         }   
         if(!allowFlag){   
             request.setAttribute("fileTypeError",    
                     "您上传的文件中存在不允许上传的类型,允许上传的类型为："+getAllowTypes());   
             return INPUT;   
         }   
            
         //允许上传   
         File dir=new File(getSavePath());   
         if(!dir.exists()){   
             dir.mkdirs();   
         }   
         List<File> files=getFileName();   
         for(int i=0;i<files.size();i++){   
             FileOutputStream fos=new FileOutputStream(getSavePath()+"//"+getFileNameFileName().get(i));   
             FileInputStream fis=new FileInputStream(getFileName().get(i));   
             byte []buffers=new byte[1024];   
             int len=0;   
             while((len=fis.read(buffers))!=-1){   
                 fos.write(buffers,0,len);   
             }   
         }   
            
         List<String> fileHrefsList=new ArrayList<String>();   
         for(String fileName:getFileNameFileName()){   
             String href="<a href="/" mce_href="/""downloadFile.action?fileName="+fileName+"/">"+fileName+"</a>";   
             fileHrefsList.add(href);   
         }   
         request.setAttribute("fileNameList", fileHrefsList);   
         return SUCCESS;   
     }   
    
 }   

[java]view plaincopyprint? 
    
 <%@ page language="java" contentType="text/html;charset=utf-8" pageEncoding="utf-8"%>   
 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>   
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">   
 <html>   
   <head>   
     <title>Struts2多文件上传</title>   
   </head>   
      
   <body>   
     <table>   
         <tr>   
             <td>   
                 <c:choose>   
                     <c:when test="${!empty fileTypeError}">   
                         <font color="red"><b>${fileTypeError}</b></font>   
                     </c:when>   
                     <c:otherwise>   
                         <c:forEach items="${fileNameList}" var="fileName">   
                             ${fileName}<br/>   
                         </c:forEach>   
                     </c:otherwise>   
                 </c:choose>   
             </td>   
         </tr>        
     </table>   
     <!-- 不一定要选择所有文件才可以上传 -->   
     <form action="uploadFile.action" method="post" enctype="multipart/form-data">   
         <input type="file" name="fileName"/><br/>   
         <input type="file" name="fileName"/><br/>   
         <input type="file" name="fileName"/><br/>   
         <input type="submit" value="上传"/>   
     </form>   
   </body>   
 </html>   

[xhtml]view plaincopyprint? 
    
 <?xml version="1.0" encoding="UTF-8"?>   
 <web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"   
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   
     xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee    
     http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">   
     <filter>   
         <filter-name>struts2</filter-name>   
         <filter-class>   
             org.apache.struts2.dispatcher.FilterDispatcher   
         </filter-class>   
     </filter>   
     <filter-mapping>   
         <filter-name>struts2</filter-name>   
         <url-pattern>*.action</url-pattern>   
     </filter-mapping>   
     <welcome-file-list>   
         <welcome-file>index.jsp</welcome-file>   
     </welcome-file-list>   
 </web-app>   

[xhtml]view plaincopyprint? 
    
 <?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.devMode" value="false" />   
     <!-- 改变struts2默认为2M的上传文件大小限制 -->   
     <constant name="struts.multipart.maxSize" value="10240000"/>   
     <package name="upload" extends="struts-default">   
         <action name="uploadFile" class="com.labci.struts2.action.UploadFileAction">   
             <param name="savePath">/upload</param>   
             <param name="allowTypes">text/plain,text/xml,text/html,image/gif,image/png,image/jpeg,image/jpg,image/bmp</param>   
             <result name="success">index.jsp</result>   
             <result name="input">index.jsp</result>   
         </action>   
         <action name="downloadFile" class="com.labci.struts2.action.DownloadFileAction">   
             <param name="savePath">/upload</param>   
             <result name="success">index.jsp</result>   
         </action>   
     </package>   
 </struts>   

[java]view plaincopyprint? 
    
 /**  
  * Struts2Test  
  * 文件下载的Action  
  */   
 package com.labci.struts2.action;   
 import java.io.FileInputStream;   
 import java.io.InputStream;   
 import java.io.OutputStream;   
 import javax.servlet.http.HttpServletRequest;   
 import javax.servlet.http.HttpServletResponse;   
 import org.apache.struts2.interceptor.ServletRequestAware;   
 import org.apache.struts2.interceptor.ServletResponseAware;   
 import com.opensymphony.xwork2.ActionSupport;   
 /**  
  * @author Bill Tu(tujiyue/iwtxokhtd)  
  * Jun 8, 2011[9:15:15 PM]  
  *  
  */   
 public class DownloadFileAction extends ActionSupport implements   
         ServletRequestAware, ServletResponseAware {   
        
     /**  
      *   
      */   
     private static final long serialVersionUID = -7448748577778248376L;   
     private HttpServletRequest request;   
     private HttpServletResponse response;   
     private String savePath;   
        
     @Override   
     public String execute() throws Exception {   
            
         String fileName=request.getParameter("fileName");   
         String fullPath=getSavePath()+"//"+fileName;   
         fileName=new String(fileName.getBytes("utf-8"),"iso-8859-1");   
         InputStream is=new FileInputStream(fullPath);   
         int len=0;   
         byte []buffers=new byte[1024];   
         response.reset();   
         response.setContentType("application/x-msdownload");   
         response.addHeader("Content-Disposition", "attachment;filename=/""+fileName+"/"");   
            
         //把文件内容通过输出流打印到页面上供下载   
         while((len=is.read(buffers))!=-1){   
             OutputStream os=response.getOutputStream();   
             os.write(buffers, 0, len);   
         }   
            
         is.close();   
            
         return SUCCESS;   
     }   
     public void setServletRequest(HttpServletRequest req) {   
         this.request=req;   
     }   
     public void setServletResponse(HttpServletResponse resp) {   
         this.response=resp;   
     }   
     @SuppressWarnings("deprecation")   
     public String getSavePath() {   
         return request.getRealPath(savePath);   
     }   
     public void setSavePath(String savePath) {   
         this.savePath = savePath;   
     }   
        
 }   

Struts2(多)文件上传和下载使用示例

热门文章

最新文章

相关课程

相关电子书