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spring mvc檔案上傳下載下傳

轉自:http://blog.csdn.net/huang_hws/article/details/6689111

當然前提是已經設定好了spring mvc的配置。

上傳:

前台:
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>hello</title>
</head>
<body>
    <div>
        <form  enctype='multipart/form-data'  method="post" action="upload.do">
            <input type="file" name="uploadFile" />
            <button>送出</button>
        </form>
    </div>
</body>
</html>      

調用背景的upload.do的請求

背景:
package hope.cs.zhku.controller;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;

/******************************************************************************
 * 名稱:UserBasicEditorController.java</br>
 * 日期:2011-8-15</br>
 * 功能:</br>
 * 編寫:Willson Huang</br>
 * 複核:</br>
 * 其他:</br>
 * 曆史:(說明,修改人,時間)</br>
 * 1.create ,Willson Huang ,2011-8-15
 *****************************************************************************/
@Controller
public class UploadController {

    @RequestMapping("upload.do")
    public String upload(HttpServletRequest request,HttpServletResponse response ){
        MultipartHttpServletRequest multipartHttpservletRequest=(MultipartHttpServletRequest) request;
        MultipartFile multipartFile = multipartHttpservletRequest.getFile("uploadFile");
        String originalFileName=multipartFile.getOriginalFilename();
        File file=new File("file");
        if(!file.exists()){
            file.mkdir();
        }
        System.out.println(file.getAbsolutePath());
        try {
            FileOutputStream fileOutputStream=new FileOutputStream(file+"/uploadFile"+originalFileName.substring(originalFileName.lastIndexOf('.'),
 originalFileName.length()));
            fileOutputStream.write(multipartFile.getBytes());
            fileOutputStream.flush();
            fileOutputStream.close();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            return "error";
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            return "error";
        }
        return "uploadSuccess";
    }
}
此時,配置檔案如前一遍文章的配置所示,此處不再列出,控制器中有一句輸出語句,輸出檔案儲存的位置,可自行更改

      
前台:
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <script type="text/javascript" src="js/jquery-1.4.4.min.js"></script>
<title>Insert title here</title>
</head>
<body>
    <input id='fileName' type="text" name="fileName"/>
    <a href="download.do" target="blank"><button>下載下傳</button></a>
</body>
<script type="text/javascript">
    $(function(){
        $('a').click(function(){
            var link=this.href+'?'+'fileName='+$('#fileName').val();
            window.open(link);
            return false;
        });
    });
</script>
</html>
背景:
前台填寫要下載下傳的檔案,背景從檔案夾裡查找,如果沒有檔案則傳回錯誤檔案,否則則提供任意檔案類型的下載下傳(填寫檔案時必須寫字尾)
package hope.cs.zhku.controller;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

/******************************************************************************
 * 名稱:UserBasicEditorController.java</br>
 * 日期:2011-8-15</br>
 * 功能:</br>
 * 編寫:Willson Huang</br>
 * 複核:</br>
 * 其他:</br>
 * 曆史:(說明,修改人,時間)</br>
 * 1.create ,Willson Huang ,2011-8-15
 *****************************************************************************/
@Controller
public class DownloadController {

    @RequestMapping("download.do")
    public void downloadFile(String fileName,HttpServletResponse response){
        response.setCharacterEncoding("utf-8");
        response.setContentType("multipart/form-data");

        response.setHeader("Content-Disposition", "attachment;fileName="+fileName);
        try {
            File file=new File(fileName);
            System.out.println(file.getAbsolutePath());
            InputStream inputStream=new FileInputStream("file/"+file);
            OutputStream os=response.getOutputStream();
            byte[] b=new byte[1024];
            int length;
            while((length=inputStream.read(b))>0){
                os.write(b,0,length);
            }
            inputStream.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}