SpringMVC上传文件的两种方法

SpringMVC上传文件的两种方法

在该示例中，阐述了SpringMVC如何上传文件。

1、上传页面upload.jsp

file:

2、controller配置文件

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xmlns:mvc="http://springframework.org/schema/mvc"

xmlns:p="http://springframework.org/schema/p"

xmlns:context="http://springframework.org/schema/context"

xmlns:aop="http://springframework.org/schema/aop"

xmlns:tx="http://springframework.org/schema/tx"

xsi:schemaLocation="http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans-3.0.xsd

http://springframework.org/schema/context

http://springframework.org/schema/context/spring-context-3.0.xsd

http://springframework.org/schema/aop

http://springframework.org/schema/aop/spring-aop-3.0.xsd

http://springframework.org/schema/tx

http://springframework.org/schema/tx/spring-tx-3.0.xsd

http://springframework.org/schema/mvc

http://springframework.org/schema/mvc/spring-mvc-3.0.xsd

http://springframework.org/schema/context

http://springframework.org/schema/context/spring-context-3.0.xsd">

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xmlns:mvc="http://springframework.org/schema/mvc"

xmlns:p="http://springframework.org/schema/p"

xmlns:context="http://springframework.org/schema/context"

xmlns:aop="http://springframework.org/schema/aop"

xmlns:tx="http://springframework.org/schema/tx"

xsi:schemaLocation="http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans-3.0.xsd

http://springframework.org/schema/context

http://springframework.org/schema/context/spring-context-3.0.xsd

http://springframework.org/schema/aop

http://springframework.org/schema/aop/spring-aop-3.0.xsd

http://springframework.org/schema/tx

http://springframework.org/schema/tx/spring-tx-3.0.xsd

http://springframework.org/schema/mvc

http://springframework.org/schema/mvc/spring-mvc-3.0.xsd

http://springframework.org/schema/context

http://springframework.org/schema/context/spring-context-3.0.xsd">

主要是添加了文件上传的解析器，配置了默认编码，最大的上传大小以及缓存大小等参数。

3、Controller

package cn.com.yy.controller;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputSACuesxIrljtream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import org.springframework.stereotype.Controller;

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

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

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

@Controller

@RequestMapping("/data")

public class FileUploadController {

/**

* method1:通过参数CommonsMultipartFile进行解析

* @RequestParam("file")中的file对应于upload.jsp中的file类型的name对应的名称

* @param file

* @return

* @throws IOException

*/

@RequestMapping(value="/uploadfile")

public String upload1(@RequestParam("file") CommonsMultipartFile file) throws IOException{

//获取文件名称

String fileName = file.getOriginalFilename();

//写入本地磁盘

InputStream is = file.getInputStream();

byte[] bs = new byte[1024];

int len;

OutputStream os = new FileOutputStream(new File("D:/temp/" + fileName));

while ((len = is.read(bs)) != -1) {

os.write(bs, 0, len);

}

os.close();

is.close();

return "upload_success";

}

@RequestMapping("/upload")

public String toPage(){

return "upload";

}

}

4、返回页面upload_success.jsp

upload file success!!

5、测试

访问  http://localhost:8080/TestSpringMVC3/data/upload  跳转到上传页面

选择文件上传

点击上传会跳转到上传成功页面。

上述方法只是简单的讲解了SpringMVC如何上传文件。

第二种方法：使用SpringMVC封装的方法进行文件上传

/**

* 使用SpringMVC封装好的方法进行文件上传

* @param request

* @param response

* @throws IllegalStateException

* @throws IOException

*/

@RequestMapping("/uploadfile2")

public void upload2(HttpServletRequest request,HttpServletResponse response) throws IllegalStateException, IOException{

//获取解析器

CommonsMultipartResolver resolver = new CommonsMultipartResolver(request.getSession().getServletContext());

//判断是否是文件

if(resolver.isMultipart(request)){

//进行转换

MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest)(request);

//获取所有文件名称

Iterator it = multiRequest.getFileNames();

while(it.hasNext()){

//根据文件名称取文件

MultipartFile file = multiRequest.getFile(it.next());

String fileName = file.getOriginalFilename();

String localPath = "D:/temp/" + fileName;

File newFile = new File(localPath);

//上传的文件写入到指定的文件中

file.transferTo(newFile);

}

}

}

该方法上传文件效率更优。

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