1、导包
- Spring
- commons-fileupload
- commons-io
2、项目配置web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>uploadmvc</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-servlet.xml</param-value>
</context-param>
<servlet>
<servlet-name>springServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value></param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
3、DispatcherServlet配置
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
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-4.1.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd">
<!-- scan the package and the sub package -->
<context:component-scan base-package="com.sysker"/>
<!-- don't handle the static resource -->
<mvc:default-servlet-handler />
<!-- if you use annotation you must configure following setting -->
<mvc:annotation-driven />
<!-- 文件上传解析器 -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!-- 文件总大小 -->
<property name="maxUploadSize" value="500000"></property>
<!-- 单个文件总大小 -->
<property name="maxUploadSizePerFile" value="500000"></property>
<!-- 编码方式 -->
<property name="defaultEncoding" value="utf-8"></property>
</bean>
<!-- configure the InternalResourceViewResolver -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"
id="internalResourceViewResolver">
<!-- 前缀 -->
<property name="prefix" value="/WEB-INF/view/" />
<!-- 后缀 -->
<property name="suffix" value=".jsp" />
</bean>
</beans>
<!-- 文件上传解析器 -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!-- 文件总大小 -->
<property name="maxUploadSize" value="500000"></property>
<!-- 单个文件总大小 -->
<property name="maxUploadSizePerFile" value="500000"></property>
<!-- 编码方式 -->
<property name="defaultEncoding" value="utf-8"></property>
</bean>
4、创建Controller
package com.sysker.util;
import java.io.File;
import javax.servlet.http.HttpSession;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
@Controller
public class UploadAndDownloadController {
@RequestMapping(value = "/")
public String index() {
return "index";
}
/**
* 单个文件上传
*
* @param uploadFile
* @param session
* @return
* @throws Exception
*/
@RequestMapping(value = "/upload")
public String doUpload(MultipartFile uploadFile, HttpSession session)
throws Exception {
String fileName = uploadFile.getOriginalFilename();
String leftPath = session.getServletContext().getRealPath("/images");
File file = new File(leftPath, fileName);
uploadFile.transferTo(file);
return "welcome";
}
/**
* 限制文件上传格式
*
* @param uploadFile
* @param session
* @return
* @throws Exception
*/
@RequestMapping(value = "/uploadlim")
public String doUploadLim(MultipartFile uploadFile, HttpSession session)
throws Exception {
if (uploadFile.getSize() > 0) {
String fileName = uploadFile.getOriginalFilename();
if (fileName.endsWith("jpg") || fileName.endsWith("gif")
|| fileName.endsWith("png")) {
String leftPath = session.getServletContext()
.getRealPath("/images");
File file = new File(leftPath, fileName);
uploadFile.transferTo(file);
} else {
return "error";
}
} else {
return "error";
}
return "welcome";
}
/**
* 多文件上传
*
* @param uploadFile
* @param session
* @return
* @throws Exception
*/
@RequestMapping(value = "/uploadmany")
public String doUploadMany(@RequestParam MultipartFile[] uploadFile,
HttpSession session) throws Exception {
for (MultipartFile multipartFile : uploadFile) {
String fileName = multipartFile.getOriginalFilename();
if (fileName.endsWith("jpg") || fileName.endsWith("gif")
|| fileName.endsWith("png")) {
String leftPath = session.getServletContext()
.getRealPath("/images");
File file = new File(leftPath, fileName);
multipartFile.transferTo(file);
} else {
return "error";
}
}
return "welcome";
}
}
- 这里需要注意的是代码中指定的的文件夹要手动创建，比如在我的代码中指定的路径为/images，那么我就必须在WebRoot下创建该目录，否则会抛出异常：
java.io.FileNotFoundException: D:\tools\eclipse-jee-oxygen-3a-win32-x86_64\eclipse-workspace\uploadmvc\WebContent\images
\58ba68439f0ea21d2ec37ffbe25f9e73.jpg (系统找不到指定的路径。)
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="${pageContext.request.contextPath }/upload" method="post" enctype="multipart/form-data">
<h2>文件上传</h2>
文件:<input type="file" name="uploadFile"/><br/><br/>
<input type="submit" value="上传"/>
</form>
<form action="${pageContext.request.contextPath }/uploadlim" method="post" enctype="multipart/form-data">
<h2>文件上传：限定文件格式</h2>
文件:<input type="file" name="uploadFile "/><br/><br/>
<input type="submit" value="上传"/>
</form>
<form action="${pageContext.request.contextPath }/uploadmany" method="post" enctype="multipart/form-data">
<h2>文件上传：多文件限定文件格式</h2>
文件1:<input type="file" name="uploadFile "/><br/><br/>
文件2:<input type="file" name="uploadFile "/><br/><br/>
文件3:<input type="file" name="uploadFile "/><br/><br/>
<input type="submit" value="上传"/>
</form>
</body>
</html>
