springmvc文件上传下载

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springmvc上传下载功能 参照网上代码写了一个简单的例子

 

1、需要导入jar包：ant.jar、commons-fileupload.jar、connom-io.jar。当然spring jar包不可缺少的哦  我这里用的是spring+springmvc+hibernate  可以到官网上直接下载springmvcjar即可

 

2、springmvc.xml文件配置

	
	



 
 



 
     
     
       10000000  
     
    



  
  
 
 
 	
 		
  
 

 3、web.xml配置

    spring
    org.springframework.web.servlet.DispatcherServlet
    
      contextConfigLocation
      classpath*:config/spring/spring-*.xml
    
    1
  
  
    spring
    *.do
  

    codeUTF-8
    org.springframework.web.filter.CharacterEncodingFilter
    
      encoding
      UTF-8
    
    
      forceEncoding
      true
    
  
  
    codeUTF-8
    /*
  

 

4、程序代码块

package com.ai.customer.controller;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

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

import org.apache.commons.fileupload.FileUpload;
import org.apache.commons.io.FileUtils;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.ModelAndView;

@Controller
public class FileUploadController {

	/*
	 * SpringMVC中的文件上传
	 * @第一步：由于SpringMVC使用的是commons-fileupload实现，故将其组件引入项目中
	 * @这里用到的是commons-fileupload-1.2.1.jar和commons-io-1.3.2.jar
	 * @第二步：spring-mvx中配置MultipartResolver处理器。可在此加入对上传文件的属性限制
	 *  
	 *       
	 *          
	 *            10000000  
	 *           
	 *  
	 * 第三步：在Controller的方法中添加MultipartFile参数。该参数用于接收表单中file组件的内容
	 *第四步：编写前台表单。注意enctype="multipart/form-data"以及
	 *  如果是单个文件 直接使用MultipartFile 即可
	 */ 

	/**********************上传代码**************************/
	@RequestMapping("/upload.do")
	public ModelAndView upload(String name,
			//上传多个文件
			@RequestParam("file") MultipartFile[] file,
			HttpServletRequest request) throws IllegalStateException,
			IOException {
		
		//获取文件 存储位置
		String realPath = request.getSession().getServletContext()
				.getRealPath("/uploadFile");
		
		File pathFile = new File(realPath);
		
		if (!pathFile.exists()) {
			//文件夹不存 创建文件
			pathFile.mkdirs();
		}
		for (MultipartFile f : file) {
			
			System.out.println("文件类型："+f.getContentType());
			System.out.println("文件名称："+f.getOriginalFilename());
			System.out.println("文件大小:"+f.getSize());
			System.out.println(".................................................");
			//将文件copy上传到服务器
			f.transferTo(new File(realPath + "/" + f.getOriginalFilename()));
			 //FileUtils.copy
		}
		//获取modelandview对象
		ModelAndView view = new ModelAndView();
		view.setViewName("redirect:index.jsp");
		return view;
	}
	
	
	
	/********下载代码*************/
    @RequestMapping(value = "download.do")  
    public ModelAndView download(HttpServletRequest request,  
            HttpServletResponse response) throws Exception {  
  
//        String storeName = "Spring3.xAPI_zh.chm";  
    	String storeName="房地.txt";
        String contentType = "application/octet-stream";  
        FileUploadController.download(request, response, storeName, contentType);  
        return null;  
    }  
    
    
    //文件下载 主要方法
    public static void download(HttpServletRequest request,  
            HttpServletResponse response, String storeName, String contentType
           ) throws Exception {  
    	
        request.setCharacterEncoding("UTF-8");  
        BufferedInputStream bis = null;  
        BufferedOutputStream bos = null;  
  
        //获取项目根目录
        String ctxPath = request.getSession().getServletContext()  
                .getRealPath("");  
        
        //获取下载文件露肩
        String downLoadPath = ctxPath+"/uploadFile/"+ storeName;  
  
        //获取文件的长度
        long fileLength = new File(downLoadPath).length();  

        //设置文件输出类型
        response.setContentType("application/octet-stream");  
        response.setHeader("Content-disposition", "attachment; filename="  
                + new String(storeName.getBytes("utf-8"), "ISO8859-1")); 
        //设置输出长度
        response.setHeader("Content-Length", String.valueOf(fileLength));  
        //获取输入流
        bis = new BufferedInputStream(new FileInputStream(downLoadPath));  
        //输出流
        bos = new BufferedOutputStream(response.getOutputStream());  
        byte[] buff = new byte[2048];  
        int bytesRead;  
        while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {  
            bos.write(buff, 0, bytesRead);  
        }  
        //关闭流
        bis.close();  
        bos.close();  
    }  
	 
}  

 

5、jsp页面代码 注意：设置表单中form表单的属性为：enctype="multipart/form-data"

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>