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spring boot实现文件上传下载以及多文件上传

2017-04-27 20:57 891 查看
首先是很简单的界面，在resource/static下创建文件file.html
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"
xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
<head>
<title>Hello World!</title>
</head>
<body>
<form method="POST" enctype="multipart/form-data" action="/upload">
<p>文件：<input type="file" name="file" /></p>
<p><input type="submit" value="上传" /></p>
</form>
<br><br><br>
<form method="POST" enctype="multipart/form-data" action="/batch/upload">
<p>文件1：<input type="file" name="file" /></p>
<p>文件2：<input type="file" name="file" /></p>
<p>文件3：<input type="file" name="file" /></p>
<p><input type="submit" value="上传" /></p>
</form>
<br><br><br>
<a href="/fileDownload">下载</a>
</body>
</html>
//然后是controller层
package com.example.myproject.web;

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

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.List;

/**
* Created by lenovo on 2017/4/27.
*/
@Controller
public class FileController {

/**
* 文件上传具体实现方法;
* @param file
* @return
*/
@RequestMapping("/upload")
@ResponseBody
public String handleFileUpload(@RequestParam("file")MultipartFile file){
if(!file.isEmpty()){
try {
String fileName = file.getOriginalFilename();
BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(new File("F:\\files\\" + fileName)));
out.write(file.getBytes());
out.flush();
out.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
return"上传失败,"+e.getMessage();
} catch (IOException e) {
e.printStackTrace();
return"上传失败,"+e.getMessage();
}
return"上传成功";
}else{
return"上传失败，因为文件是空的.";
}
}
@RequestMapping(value = "/fileDownload")
@ResponseBody
public String download(HttpServletResponse response) throws Exception {
BufferedInputStream bis = null;
BufferedOutputStream bos = null;
//获取下载文件露肩
String downLoadPath = "F:\\迅雷下载\\day13\\avi\\13.01_常见对象(StringBuffer的概述).avi";

/*response.setHeader("content-type", "application/octet-stream");

//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");
//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(new FileOutputStream(new File("F:\\1.avi")));
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();

return "下载成功";
}

@RequestMapping(value="/batch/upload", method= RequestMethod.POST)
@ResponseBody
public String handleFileUpload(HttpServletRequest request){
List<MultipartFile> files = ((MultipartHttpServletRequest)request).getFiles("file");
MultipartFile file = null;
BufferedOutputStream stream = null;
for (int i =0; i< files.size(); ++i) {
file = files.get(i);
if (!file.isEmpty()) {
try {
BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(new FileOutputStream(new File("F:\\files\\" + file.getOriginalFilename())));
bufferedOutputStream.write(file.getBytes());
bufferedOutputStream.flush();
bufferedOutputStream.close();
} catch (Exception e) {
return "You failed to upload " + i + " => " + e.getMessage();
}
} else {
return "You failed to upload " + i + " because the file was empty.";
}
}
return "上传成功";
}
}
//我们要设置一些属性//在application.properties
#文件上传配置
spring.http.multipart.max-file-size=32MB
spring.http.multipart.max-request-size=128MB
#启动程序,访问http://localhost:8080/file.html即可

                                            

                                        

                        
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                         标签： 
                                                spring boot
                                                MultipartFile
                                                文件上传
                                                

                        

                    


                

            


            

                
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