代码示例
FileUploadController.java:
1 package com.atguigu.controller; 2 3 import org.springframework.stereotype.Controller; 4 import org.springframework.ui.Model; 5 import org.springframework.web.bind.annotation.RequestMapping; 6 import org.springframework.web.bind.annotation.RequestParam; 7 import org.springframework.web.multipart.MultipartFile; 8 9 import java.io.File; 10 import java.io.IOException; 11 12 /** 13 * @Title: FileUploadController 14 * @Description: 15 * @Author: 16 * @Version: 1.0 17 * @create 2020/6/22 10:28 18 */ 19 @Controller 20 public class FileUploadController { 21 22 /** 23 * @Description: 单文件上传 24 * @Param: [username, file, model] 25 * @Return: java.lang.String 26 * @Author: 27 * @Date: 2020/6/22 10:49 28 */ 29 /* @RequestMapping("/upload") 30 public String upload(@RequestParam(value = "username", required = false) String username, 31 @RequestParam("headerimg") MultipartFile file, 32 Model model) { 33 System.out.println("上传的文件信息"); 34 System.out.println("文件项的name" + file.getName());//headerimg 35 System.out.println("文件的名字" + file.getOriginalFilename()); 36 37 //文件保存 38 try { 39 file.transferTo(new File("E:\upload\" + file.getOriginalFilename())); 40 model.addAttribute("msg", "文件上传成功"); 41 } catch (IOException e) { 42 model.addAttribute("msg", "文件上传失败" + e.getMessage()); 43 } 44 return "forward:/index.jsp"; 45 }*/ 46 47 /** 48 * @Description: 多文件上传 49 * @Param: [username, file, model] 50 * @Return: java.lang.String 51 * @Author: 52 * @Date: 2020/6/22 10:49 53 */ 54 @RequestMapping("/upload") 55 public String upload(@RequestParam(value = "username", required = false) String username, 56 @RequestParam("headerimg") MultipartFile[] file, 57 Model model) { 58 59 for (MultipartFile multipartFile : file) { 60 if(!multipartFile.isEmpty()){ 61 System.out.println("上传的文件信息"); 62 System.out.println("文件项的name" + multipartFile.getName());//headerimg 63 System.out.println("文件的名字" + multipartFile.getOriginalFilename()); 64 try { 65 multipartFile.transferTo(new File("E:\upload\" + multipartFile.getOriginalFilename())); 66 model.addAttribute("msg", "文件上传成功"); 67 } catch (IOException e) { 68 model.addAttribute("msg", "文件上传失败" + e.getMessage()); 69 } 70 } 71 } 72 return "forward:/index.jsp"; 73 } 74 }
springmvc.xml:
1 <?xml version="1.0" encoding="UTF-8"?> 2 <beans xmlns="http://www.springframework.org/schema/beans" 3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4 xmlns:context="http://www.springframework.org/schema/context" 5 xmlns:mvc="http://www.springframework.org/schema/mvc" 6 xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd 7 http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd 8 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd"> 9 10 <context:component-scan base-package="com.atguigu"></context:component-scan> 11 12 <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 13 <property name="prefix" value="/WEB-INF/pages/"></property> 14 <property name="suffix" value=".jsp"></property> 15 </bean> 16 17 <!-- 默认前端控制器是拦截所有资源（除过jsp），js文件就404了；要js文件的请求是交给tomcat处理的 18 http://localhost:8080/7.SpringMVC_crud/scripts/jquery-1.9.1.min.js --> 19 <!-- 告诉SpringMVC，自己映射的请求就自己处理，不能处理的请求直接交给tomcat --> 20 <!-- 静态资源能访问，动态映射的请求就不行 --> 21 <mvc:default-servlet-handler/> 22 <!-- springmvc可以保证动态请求和静态请求都能访问 --> 23 <mvc:annotation-driven/> 24 25 <!--配置文件上传解析器 id必须是multipartResolver--> 26 <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> 27 <!--最大20M--> 28 <property name="maxUploadSize" value="#{1024*1024*20}"></property> 29 <!--设置默认的编码--> 30 <property name="defaultEncoding" value="utf-8"></property> 31 32 </bean> 33 34 </beans>
web.xml:
1 <!DOCTYPE web-app PUBLIC 2 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" 3 "http://java.sun.com/dtd/web-app_2_3.dtd" > 4 5 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" 6 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" 7 id="WebApp_ID" version="3.0"> 8 <display-name>9.SpringMVC_upload</display-name> 9 <welcome-file-list> 10 <welcome-file>index.jsp</welcome-file> 11 </welcome-file-list> 12 13 <!-- The front controller of this Spring Web application, 14 responsible for handling all application requests --> 15 <servlet> 16 <servlet-name>springDispatcherServlet</servlet-name> 17 <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 18 <init-param> 19 <!-- contextConfigLocation:指定SpringMVC配置文件位置 --> 20 <param-name>contextConfigLocation</param-name> 21 <param-value>classpath:springmvc.xml</param-value> 22 </init-param> 23 <load-on-startup>1</load-on-startup> 24 </servlet> 25 26 <!-- Map all requests to the DispatcherServlet for handling --> 27 <servlet-mapping> 28 <servlet-name>springDispatcherServlet</servlet-name> 29 <url-pattern>/</url-pattern> 30 </servlet-mapping> 31 32 <!-- 配置一个字符编码的Filter；一定注意：字符编码filter一般都在其他Filter之前； --> 33 <!--配置字符集编码的Filter--> 34 <filter> 35 <filter-name>CharacterEncodingFilter</filter-name> 36 <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> 37 <!-- encoding：指定解决POST请求乱码 --> 38 <init-param> 39 <param-name>encoding</param-name> 40 <!--不区分大小写--> 41 <param-value>utf-8</param-value> 42 </init-param> 43 <init-param> 44 <!-- forceEncoding:顺手解决响应乱码；response.setCharacterEncoding(this.encoding); --> 45 <param-name>forceEncoding</param-name> 46 <param-value>true</param-value> 47 </init-param> 48 </filter> 49 <filter-mapping> 50 <filter-name>CharacterEncodingFilter</filter-name> 51 <url-pattern>/*</url-pattern> 52 </filter-mapping> 53 54 <!--支持Rest风格的Filter（开启PUT、DELETE请求）--> 55 <filter> 56 <filter-name>HiddenHttpMethodFilter</filter-name> 57 <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class> 58 </filter> 59 <filter-mapping> 60 <filter-name>HiddenHttpMethodFilter</filter-name> 61 <url-pattern>/*</url-pattern> 62 </filter-mapping> 63 <!-- 使用SpringMVC前端控制器写完就直接写字符编码过滤器； 64 Tomcat一装上，上手就是server.xml的8080处添加URIEncoding="UTF-8" 65 --> 66 67 </web-app>
index.jsp:
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 7 <title>Insert title here</title> 8 <% 9 pageContext.setAttribute("ctp", request.getContextPath()); 10 %> 11 </head> 12 <body> 13 <!-- 14 1.文件上传 15 1)文件上传表单准备：enctype="multipart/form-data" 16 2）导入fileupload jar包： 17 commons-fileupload 18 commons-io 19 3）只要在SpringMVC配置文件中编写一个配置，配置文件上传解析器 MultipartResolver 20 4）文件上传请求处理 21 在处理器方法上写一个@RequestParam("headerimg") MultipartFile file，封装当前文件的信息，可以直接保存 22 23 --> 24 ${msg} 25 <form action="${ctp}/upload" method="post"enctype="multipart/form-data"> 26 用户头像：<input type="file"name="headerimg"><br/> 27 用户头像：<input type="file" name="headerimg"><br/> 28 用户头像：<input type="file" name="headerimg"><br/> 29 用户头像：<input type="file" name="headerimg"><br/> 30 用户头像：<input type="file" name="headerimg"><br/> 31 用户名：<input type="text" name="username"><br/> 32 <input type="submit" value="提交"> 33 </form> 34 </body> 35 </html>