SpringMVC框架

9.2 文件上传示例

  • 拷贝jar包

commons-fileupload-1.2.1.jar

commons-io-2.0.jar

严重: Servlet /SpringMVC_06_FileUpload threw load() exception

java.lang.ClassNotFoundException: org.apache.commons.fileupload.FileItemFactory

  • 配置文件上传解析器

<!-- 配置文件上传解析器

id必须是"multipartResolver",否则,会报错误:

java.lang.IllegalArgumentException: Expected MultipartHttpServletRequest: is a MultipartResolver configured?

 -->

<bean id="multipartResolver"

 class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

<property name="defaultEncoding" value="UTF-8"></property>

<property name="maxUploadSize" value="1024000"></property>

</bean>

  • 上传页面

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

    pageEncoding="UTF-8"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"

 "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>Insert title here</title>

</head>

<body>

<form action="testUpload" method="post" enctype="multipart/form-data">

文件: <input type="file" name="file"/><br><br>

描述: <input type="text" name="desc"/><br><br>

<input type="submit" value="提交"/>

</form>

</body>

</html>

  • 控制器方法

package com.atguigu.springmvc.crud.handlers;

import java.io.IOException;

import java.io.InputStream;

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.multipart.MultipartFile;

@Controller

public class UploadHandler {

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

public String testUpload(@RequestParam(value="desc",required=false) String desc, @RequestParam("file") MultipartFile multipartFile) throws IOException{                

System.out.println("desc : "+desc);

System.out.println("OriginalFilename : "+multipartFile.getOriginalFilename());

InputStream inputStream = multipartFile.getInputStream();

System.out.println("inputStream.available() : "+inputStream.available());

System.out.println("inputStream : "+inputStream);

return "success"; //增加成功页面: /views/success.jsp

}

}