springMVC框架的文件上传

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基于springMVC 3.X 框架的文件上传实现

1. spring使用了apache-commons下得上传组件，因此，我们需要引入两个jar包：

1. commons-fileupload.jar

2. commons-io.jar

3. 在springmvc-servlet.xml配置文件中，增加CommonsMultipartResoler配置：

<beans xmlns="http://www.springframework.org/schema/beans"

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

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

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

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

xsi:schemaLocation="

http://www.springframework.org/schema/beans

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

http://www.springframework.org/schema/context

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

http://www.springframework.org/schema/mvc

http://www.springframework.org/schema/mvc/spring-mvc.xsd">

<context:component-scan base-package="cn.bdqn.controller"/>

<mvc:annotation-driven />

<mvc:resources mapping="/resources/**" location="/resources/" />

</bean>

</bean>

</beans>

</bean>

3. 建立upload.jsp页面，内容如下：

<%@ page language="java" import="java.util.*" pageEncoding=" utf-8"%>

<html>

<head>

<title>测试springmvc中上传的实现</title>

</head>

<body>

姓名：<input type="text" name="name" />

上传资源：<input type="file" name="attach" />

</form>

</body>

</html>

4. 建立控制器，代码如下：

package cn.bdqn.controller;

import java.io.File;

import java.util.Date;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.io.FileUtils;

import org.springframework.stereotype.Controller;

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

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

import org.springframework.web.multipart.MultipartFile;

@Controller

public class UploadController {

@RequestMapping(value = "/upload", method = RequestMethod.POST)

public String handleUploadData(Stringname, @RequestParam MultipartFile attach, HttpServletRequest req) {

//判断文件是否为空

if(!attach.isEmpty()){

String realPath = req.getSession().getServletContext().getRealPath("/resources/upload");

//获取文件名称

String fileName=attach.getOriginalFilename();

System.out.println(realPath+"/"+fileName);

File file = new File(realPath+"/"+fileName);

//获取文件类型

String fileType = fileName.substring(fileName.lastIndexOf("."));

//为避免重名，可以新建文件

File newFile=new File(realPath,new Date().getTime()+fileType);

try {

//以下三种方式都是上传文件到指定位置，可以按需选用一个

FileUtils.copyInputStreamToFile(attach.getInputStream(),file);//拷贝文件

//FileUtils.writeByteArrayToFile(newFile, attach.getBytes());//将文件重命名存储

//attach.transferTo(newFile);//快速复制文件

} catch (Exception e) {

e.printStackTrace();

}

System.out.println(attach.getName()+" ======= "+attach.getOriginalFilename()+" ====== "+attach.getContentType());

return "redirect:upload_ok.jsp";

} else {

return "redirect:upload_error.jsp";

}

5. 建立upload_ok.jsp页面

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<html>

<head>

</head>

<body>

</body>

</html>

6. 建立upload_error.jsp页面

<%@ page language="java" import="java.util.*" pageEncoding=" utf-8"%>

<html>

<head>

</head>

<body>

</body>

</html>

1. 发布项目，运行测试：http://localhost:8080/springmvc03/upload.jsp

进入项目发布后的目录，发现文件上传成功：

多文件上传示例代码：

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

pageEncoding="UTF-8"%>

<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

<%@taglib prefix="sf" uri="http://www.springframework.org/tags/form" %>

<!DOCTYPE html>

<html>

<head>

</head>

<body>

<sf:form method="post" modelAttribute="user" enctype="multipart/form-data">

UserName:<sf:input path="userName"/><sf:errors path="userName"/><br/>

password:<sf:password path="password"/><sf:errors path="password"/><br/>

position:<sf:input path="position"/><br/>

email:<sf:input path="email"/><sf:errors path="email"/><br/>

Attach1:<input type="file" name="attachs"/><br/>

Attach2:<input type="file" name="attachs"/><br/>

Attach3:<input type="file" name="attachs"/><br/>

Attach4:<input type="file" name="attachs"/><br/>

</sf:form>

</body>

</html>

Controller代码示例：

@RequestMapping(value="/upload",method=RequestMethod.POST)

public String add(@RequestParam("attachs") MultipartFile[] attachs,HttpServletRequest req){

String realPath = req.getSession().getServletContext().getRealPath("/resources/upload");

for(MultipartFile attach:attachs){

if(!attach.isEmpty()){//判断文件是否为空

File file = new File(realPath+"/"+attach.getOriginalFilename());

try {

attach.transferTo(file);

} catch (Exception e) {

e.printStackTrace();

}

return "redirect:upload_ok.jsp";

}

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