ssh框架文件上传下载

时间：2023-11-22 16:50:08
<!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}">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>

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