strtus2文件上传与下载

package com.tiger.upload;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.net.URLEncoder;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
/**
 * 文件下载Action
 * 此action返回一个InputStream对象
 * 自定义一个方法(下载文件入口输入流，必须将此方法名注入到InputName属性中)
 * @author tiger
 * @time 2017年10月17日
 */
public class FileDownLoadAction extends ActionSupport{
   
   private String downPath;   //下载路径
   private String filename;   //下载文件名
   private String preFilename = "eeeeeee.txt";
   
   @Override
   public String execute() throws Exception {
      //设置编码格式
      setFilename(URLEncoder.encode(preFilename,"UTF-8"));
      return SUCCESS;
   }
   /**
    * 下载文件的入口方法
    * @return
    */
   public InputStream getTargetFile() {
      FileInputStream fis = null;
      try {
         fis = new FileInputStream(getDownPath()+File.separator+preFilename);
      } catch (FileNotFoundException e) {
         e.printStackTrace();
      }
      System.out.println("下载成功,下载路径 = " + getDownPath());
      return fis;
//    return ServletActionContext.getServletContext().getResourceAsStream(getDownPath()+preFilename);
   }
   
   public String getDownPath() {
      return ServletActionContext.getServletContext().getRealPath("/WEB-INF/" + downPath);
   }
   public void setDownPath(String downPath) {
      this.downPath = downPath;
   }
   public String getFilename() {
      return filename;
   }
   public void setFilename(String filename) {
      this.filename = filename;
   }
}
package com.tiger.upload;

import java.io.*;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
/**
 * 文件上传action
 * @author tiger
 * @time 2017年10月17日
 */
public class FileUploadAction extends ActionSupport{
   private static final long serialVersionUID = 1L;
   private File upload;                //文件对象(名字必须这样)
   private String uploadContentType;      //文件类型(名字必须这样)
   private String uploadFileName;         //文件名(名字必须这样)
   private String title;               //文件标题
   private String upPath;              //文件上传保存路径
   
   @Override
   public String execute() throws Exception {
      FileInputStream fis = new FileInputStream(getUpload());
      FileOutputStream fos = new FileOutputStream(getUploadFolder()+File.separator+getUploadFileName());
      int len = 0;
      byte[] buff = new byte[1024];
      while ((len = fis.read(buff)) != -1) {
         fos.write(buff, 0, len);
      }
      fos.flush();
      fos.close();
      fis.close();
      System.out.println("上传成功");
      return SUCCESS;
   }
   /**
    * 获取文件上传路径
    * @return
    */
   private String getUploadFolder() {
      String uploadFolder = getUpPath();
      File file = new File(uploadFolder);
      if (!file.exists()) {
         file.mkdirs();
      }
      return uploadFolder;
   }
   
   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 String getTitle() {
      return title;
   }
   public void setTitle(String title) {
      this.title = title;
   }
   public String getUpPath() {
      return ServletActionContext.getServletContext().getRealPath("/WEB-INF/"+upPath);
   }
   public void setUpPath(String upPath) {
      this.upPath = upPath;
   }
}
<%@ page language="java" contentType="text/html; charset=UTF-8"
   pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>




   
上传 & 下载

      文件标题：
    
      
    
      选择文件：
    
      
    
      上传：
    
   
   
   
   



   


   
   
    
   
    
   
    
   
    

   
    
   
    
      
     
         
      
            
       

       
            
       
            
       200000
         
      
         
      
         
      
         
      
         
      fileSavePath
         
      
       /WEB-INF/content/jsp/success.jsp
      
         
      
       /file.jsp
      
      
     

      
     
      
     
         
      
         
      fileSavePath
         
      
            
       
            
       targetFile
            
       
            
       attachment;filename=${filename}
            
       
            
       200000
         
      
      
     

   
    

   10820171017
Struts2文件上传 & 下载

1、文件上传

   1)、加载 commons-fileupload.jar（默认）[另外还有cos、pell ,配置struts.multipart.parser=jakarta]

   2)、表单提交数据类型必须是 multipart/form-data ,提交方式必须是 post

   3)、编写Action类[下边三个属性名必须是那样]
   File upload;               //上传文件对象
   String uploadContentType;  //获取上传文件的类型
   String uploadFileName;     //获取文件名

2、文件下载

   1)、编写下载文件输入流的入口方法 getTargetFile();[此方法在strtus.xml中配置 inputName 使必须一致]