Spring MVC文件上传教程 commons-io/commons-uploadfile
用到的依赖jar包：
commons-fileupload 1.3.1 commons-io 2.4
基于 Spring MVC来实现文件的上传功能，这里主要是实现两个功能：1、上传单个文件并将其移动到对应的上传目录；2、一次上传多个文件并将它们存储在指定文件夹下，接下来我们一步步地实现。
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>gugua4</groupId>
<artifactId>gugua17</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>gugua17 Maven Webapp</name>
<url>http://maven.apache.org</url>
<properties>
<spring.version>4.3.5.RELEASE</spring.version>
</properties>
<dependencies>
<!-- spring模块库 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-tx -->
<!-- transaction事务 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- Servlet dependencies -->
<!-- servlet(HttpServletRequest,HttpServletResponse) -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
</dependency>
<!-- Jstl for jsp page -->
<!-- https://mvnrepository.com/artifact/jstl/jstl -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- JSP API -->
<!-- http://mvnrepository.com/artifact/javax.servlet.jsp/jsp-api -->
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
<scope>provided</scope>
</dependency>
<!-- 文件上传 -->
<!-- Apache Commons FileUpload -->
<!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
<!-- Apache Commons IO -->
<!-- http://mvnrepository.com/artifact/commons-io/commons-io -->
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
</dependency>
</dependencies>
<build>
<finalName>gugua17</finalName>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.6</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
web.xml
<web-app> <display-name>Archetype Created Web Application</display-name> <context-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/applicationContext.xml</param-value> </context-param> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class> org.springframework.web.servlet.DispatcherServlet </servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> </web-app>
spring-servlet.xml
<?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:mvc="http://www.springframework.org/schema/mvc"
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/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 引入包 -->
<context:component-scan base-package="springmvc"/>
<!-- 自动装配 -->
<context:annotation-config/>
<!-- 视图 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/views/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
<!-- 上传文件配置 -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!-- Maximum file size: 1MB -->
<!-- 1MB = 125000 Byte -->
<property name="maxUploadSize" value="125000"/>
</bean>
</beans>
applicationContext.xml
<?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:mvc="http://www.springframework.org/schema/mvc" 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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> </beans>
jsp:
uploadOneFile.jsp
<%@ 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>upload one file</title> </head> <body> <h3>upload one file</h3> <form method="post" action="do" enctype="multipart/form-data"> upload to file:<input type="file" name="file"><br> <input type="submit" value="upload"> </form> </body> </html>
uploadMultiFile.jsp
<%@ 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>upload multi file</title> </head> <body> <h3>upload multi file</h3> <form method="post" action="do" enctype="multipart/form-data"> upload to file(1):<input type="file" name="file"><br> upload to file(2):<input type="file" name="file"><br> upload to file(3):<input type="file" name="file"><br> upload to file(4):<input type="file" name="file"><br> upload to file(5):<input type="file" name="file"><br> <input type="submit" value="upload"> </form> </body> </html>
uploadResult.xml
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!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>upload result</title>
</head>
<body>
<h3>upload files:</h3>
<c:forEach items="${uploadFiles}" var="file">
-${file}<br>
</c:forEach>
</body>
</html>
controller
MultipartUploadController.java
package springmvc.controller;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
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 MultipartUploadController {
@RequestMapping(value="/upload/one", method=RequestMethod.GET)
public String uploadOneFile()
{
return "uploadOneFile";
}
@RequestMapping(value="/upload/multi", method=RequestMethod.GET)
public String uploadMultiFile()
{
return "uploadMultiFile";
}
@RequestMapping(value="/upload/do", method=RequestMethod.POST)
public String uploadDo(HttpServletRequest request, Model model, @RequestParam("file") MultipartFile[] files)
{
//获取目录/创建路径
String uploadRootPath = request.getServletContext().getRealPath("upload");
System.out.println(uploadRootPath);
//获取路径
File uploadRootDir = new File(uploadRootPath);
if(!uploadRootDir.exists())
{
uploadRootDir.mkdirs();
}
//用来存放上传后的路径地址的变量
List<File> uploadFiles = new ArrayList<File>();
for(int i = 0; i < files.length; i++)
{
MultipartFile file = files[i];
//原文件名
String name = file.getOriginalFilename();
System.out.print(name);
if(name != null && name.length() > 0)
{
try {
//获取文件字节流
byte[] bytes = file.getBytes();
//新文件路径
File serverFile = new File( uploadRootDir.getAbsolutePath() + File.separator + name );
//将文件字节流输出到刚创建的文件上
BufferedOutputStream stream = new BufferedOutputStream( new FileOutputStream( serverFile ) );
stream.write(bytes);
stream.close();
//将文件路径添加到uploadFiles中
uploadFiles.add( serverFile );
System.out.println( serverFile );
} catch (IOException e) {
// TODO Auto-generated catch block
//e.printStackTrace();
System.out.println("error to file:" + name);
}
}
}
model.addAttribute("uploadFiles", uploadFiles);
return "uploadResult";
}
}