ssh框架实现文件上传下载实例代码

最近在学习ssh框架，我用ssh框架写了一个文件上传下载的实例代码，有需要了解的朋友可参考。希望此文章对各位有所帮助。

<!doctype html>
<html lang="en">
 <head>
 <meta charset="UTF-8">
 <meta name="Author" content="BuNuo">
 <meta name="Keywords" content="文件上传下载">
 <meta name="Description" content="ssh框架文件上传下载">
 <title>Document</title>
 </head>
 <body>
 <form action="newFile" method="post" enctype="multipart/form-data">
  <input type="file" name="file">
  <input type="submit" value="上传">
 </form>
 <a href="downFile?filename=${filename}" rel="external nofollow" >下载</a>
 </body>
</html>


package com.cpsec.tang.chemical.action;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;
import org.springframework.stereotype.Controller;

import com.opensymphony.xwork2.ActionSupport;

@Controller("newFileAction")
public class NewFileAction extends ActionSupport {
 private File file;//文件
 private String fileFileName;//文件名称 
 private String fileContentType; //文件类型 
 private String filename;
 private InputStream inputStream;
 
 public String newFile(){
  File dir=new File(ServletActionContext.getServletContext().getRealPath("files")); 
  //判断文件是否上传，如果上传的话将会创建该目录 
  if(!dir.exists()){ 
   dir.mkdir(); //创建该目录 
  } 
  System.out.println(file);
  System.out.println(fileFileName);
  //第一种文件上传的方法 
  //声明文件输入流，为输入流指定文件路径 
  //获取输出流，获取文件的文件地址及名称 
  FileInputStream in=null; 
  FileOutputStream out=null;
  try{ 
   in= new FileInputStream(file);
   out=new FileOutputStream(dir + "\\" +fileFileName); 
   byte[] b=new byte[1024*1024];//每次写入的大小 
   int i=0; 
   while((i=in.read(b))>0){ 
    out.write(b,0,i); 
   } 
   in.close();
   out.close(); 
  }catch(Exception e){ 
   e.printStackTrace(); 
  }finally{ 
  } 
  
  /*//第二种文件上传的方法 
  try {
   FileUtils.copyFile(file,new File(dir,fileFileName)); 
  } catch (IOException e) {
   e.printStackTrace();
  } 
  
   //第三种方法 
   BufferedReader bReader=null;
   BufferedWriter bWriter=null;
   try{ 
    bReader = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
    bWriter = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(dir+"\\"+fileFileName))); 
    char[] str=new char[1024*1024]; 
    int i=0; 
    while((i=bReader.read(str))>0){ 
     bWriter.write(str,0,i); 
    } 
    bReader.close();
    bWriter.close(); 
    dir.delete();
   }catch(Exception e){ 
    e.printStackTrace(); 
   }finally{ 
    
   } */
   return SUCCESS;
 }
 
 public String downFile(){
  System.out.println(filename);
  inputStream=ServletActionContext.getServletContext().getResourceAsStream("/files/"+filename);
  System.out.println(inputStream);
  return SUCCESS;
 }


 public File getFile() {
  return file;
 }


 public void setFile(File file) {
  this.file = file;
 }


 public String getFileFileName() {
  return fileFileName;
 }


 public void setFileFileName(String fileFileName) {
  this.fileFileName = fileFileName;
 }


 public String getFileContentType() {
  return fileContentType;
 }


 public void setFileContentType(String fileContentType) {
  this.fileContentType = fileContentType;
 }

 public String getFilename() {
  return filename;
 }

 public void setFilename(String filename) {
  this.filename = filename;
 }

 public InputStream getInputStream() {
  return inputStream;
 }

 public void setInputStream(InputStream inputStream) {
  this.inputStream = inputStream;
 }

}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
 "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
 "http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
 <package name="newFileAction" namespace="/" extends="struts-default">
  
  <action name="downFile" class="newFileAction" method="downFile">
   <result name="success" type="stream"> 
    <param name="contentType">application/octet-stream;charset=ISO8859-1</param>
   <!-- inputName 流对象名 —— 比如这里写inputStream，它就会自动去找Action中的getInputStream方法。 -->
   <param name="inputName">inputStream</param>
   <!-- contentDisposition 使用经过转码的文件名作为下载文件名 —— 默认格式是attachment;filename="${fileName}"，将调用该Action中的getFileName方法。 -->
   <param name="contentDisposition">attachment;filename=${filename}</param>
   <!-- bufferSize 下载文件的缓冲大小 -->
   <param name="bufferSize">4096</param>
   </result>
   </action>
 </package>
</struts>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。

ssh框架实现文件上传下载实例代码

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