spring boot 常用的文件上传方式及时间比较

pom文件

<dependency>

<groupId>commons-io</groupId>

<artifactId>commons-io</artifactId>

<version>2.6</version>

</dependency>

<dependency>

<groupId>commons-fileupload</groupId>

<artifactId>commons-fileupload</artifactId>

<version>1.4</version>

</dependency>

 

增加解析类

@Bean(name = "multipartResolver")

public MultipartResolver multipartResolver(){

CommonsMultipartResolver resolver = new CommonsMultipartResolver();

resolver.setDefaultEncoding("UTF-8");

resolver.setResolveLazily(true);

resolver.setMaxInMemorySize(40960);

resolver.setMaxUploadSize(500*1024*1024);//上传文件大小 500M 500*1024*1024

return resolver;

}

 

增加注解

@EnableAutoConfiguration(exclude = {MultipartAutoConfiguration.class})

 

 

 

package cn.org.cbim.ifc2rdf.ctrl;

 

import io.swagger.annotations.Api;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.beans.factory.annotation.Value;

import org.springframework.web.bind.annotation.PostMapping;

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

import org.springframework.web.bind.annotation.RequestParam;

import org.springframework.web.bind.annotation.RestController;

import org.springframework.web.multipart.MultipartFile;

import org.springframework.web.multipart.MultipartHttpServletRequest;

import org.springframework.web.multipart.commons.CommonsMultipartFile;

import org.springframework.web.multipart.commons.CommonsMultipartResolver;

 

import javax.servlet.http.HttpServletRequest;

import java.io.*;

import java.util.Date;

import java.util.Iterator;

 

@Api(value = "上传接口")

@RestController

@RequestMapping("/v1")

public class UploadController {

private static final Logger LOG = LoggerFactory.getLogger(UploadController.class);

 

/**

* 经实际测试 第一个上传方法在50M 和230M文件的测试中都是时间最快的

* 且方法而会因为一次写1024个 多写入一些字符 导致文件大小改变

* 三个方法文件所占空间一样

*/

 

@PostMapping(value="/upload")

public String fileUpload2(@RequestParam("file") CommonsMultipartFile file) throws IOException {

long startTime=System.currentTimeMillis();

System.out.println("fileName："+file.getOriginalFilename());

String path="E:\\Temp\\2-"+new Date().getTime()+"-"+file.getOriginalFilename();

 

File newFile=new File(path);

//通过CommonsMultipartFile的方法直接写文件（注意这个时候）

file.transferTo(newFile);

long endTime=System.currentTimeMillis();

System.out.println("方法1的运行时间："+String.valueOf(endTime-startTime)+"ms");

return "success";

}

 

@PostMapping("/upload2")

public String fileUpload(@RequestParam("file") CommonsMultipartFile file) throws IOException {

 

//用来检测程序运行时间

long startTime=System.currentTimeMillis();

// System.out.println("fileName："+file.getOriginalFilename());

 

try {

//获取输出流

OutputStream os=new FileOutputStream("E:\\Temp\\1-"+new Date().getTime()+"-"+file.getOriginalFilename());

//获取输入流 CommonsMultipartFile 中可以直接得到文件的流

InputStream is=file.getInputStream();

byte[] bts = new byte[1024];

//一个一个字节的读取并写入

while(is.read(bts)!=-1)

{

os.write(bts);

}

os.flush();

os.close();

is.close();

 

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

long endTime=System.currentTimeMillis();

System.out.println("方法2的运行时间："+String.valueOf(endTime-startTime)+"ms");

return "success";

}

 

/*

*采用spring提供的上传文件的方法

*/

@PostMapping(value="/upload3")

public String springUpload(HttpServletRequest request) throws IllegalStateException, IOException

{

long startTime=System.currentTimeMillis();

//将当前上下文初始化给 CommonsMutipartResolver （多部分解析器）

CommonsMultipartResolver multipartResolver=new CommonsMultipartResolver(

request.getSession().getServletContext());

//检查form中是否有enctype="multipart/form-data"

if(multipartResolver.isMultipart(request))

{

//将request变成多部分request

MultipartHttpServletRequest multiRequest=(MultipartHttpServletRequest)request;

//获取multiRequest 中所有的文件名

Iterator iter=multiRequest.getFileNames();

 

while(iter.hasNext())

{

//一次遍历所有文件

MultipartFile file=multiRequest.getFile(iter.next().toString());

if(file!=null)

{

String path="E:\\Temp\\3-"+new Date().getTime()+"-"+file.getOriginalFilename();

//上传

file.transferTo(new File(path));

}

 

}

 

}

long endTime=System.currentTimeMillis();

System.out.println("方法3的运行时间："+String.valueOf(endTime-startTime)+"ms");

return "/success";

}

}