九、springMVC之文件上传
一、配置方式
web.xml:
只配置了DispatcherServlet：
1 <?xml version="1.0" encoding="UTF-8"?> 2 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 3 xmlns="http://xmlns.jcp.org/xml/ns/javaee" 4 xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" 5 id="WebApp_ID" version="3.1"> 6 <servlet> 7 <servlet-name>springDispatcherServletservlet-name> 8 <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class> 9 10 12 <init-param> 13 <param-name>contextConfigLocationparam-name> 14 <param-value>classpath:spring.xmlparam-value> 15 init-param> 16 17 <load-on-startup>1load-on-startup> 18 servlet> 19 20 21 <servlet-mapping> 22 <servlet-name>springDispatcherServletservlet-name> 23 <url-pattern>/url-pattern> 24 servlet-mapping> 25 web-app>
spring.xml:基础配置+CommonsMultipartResolver配置
基础配置包括：包扫描的配置、视图解析器配置、<mvc:annotation-driven>mvc:annotation-driven>；
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:mvc="http://www.springframework.org/schema/mvc" 5 xmlns:context="http://www.springframework.org/schema/context" 6 xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.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.xsd"> 9 10 <context:component-scan base-package="handler">context:component-scan> 11 12 <bean 13 class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 14 <property name="prefix" value="/WEB-INF/views/">property> 15 <property name="suffix" value=".jsp">property> 16 bean> 17 18 <mvc:annotation-driven>mvc:annotation-driven> 19 20 <bean id="multipartResolver" 21 class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> 22 <property name="defaultEncoding" value="UTF-8">property> 23 <property name="maxUploadSize" value="1024000">property> 24 bean> 25 26 beans>
二、实例验证：
1、目录结构
2.加入jar包：
springMVC基础jar包+commons-fileupload+commons-io，即：
- commons-logging-1.2.jar
- spring-beans-5.3.10.jar
- spring-context-5.3.10.jar
- spring-core-5.3.10.jar
- spring-expression-5.3.10.jar
- spring-web-5.3.10.jar
- spring-webmvc-5.3.10.jar
-
commons-fileupload-1.4.jar
-
commons-io-2.11.0.jar
3.EmployeeController.java
如果文件上传成功，跳转到success.jsp页面；
1 package handler; 2 3 import org.springframework.stereotype.Controller; 4 import org.springframework.web.bind.annotation.RequestMapping; 5 import org.springframework.web.bind.annotation.RequestParam; 6 import org.springframework.web.multipart.MultipartFile; 7 8 @RequestMapping("/emp") 9 @Controller 10 public class EmployeeController { 11 12 @RequestMapping("/testFileUpload") 13 public String testFileUpload(@RequestParam("files") MultipartFile[] files) { 14 for (int i = 0; i < files.length; i++) { 15 System.out.println(files[i].getOriginalFilename()); 16 } 17 return "success"; 18 } 19 }
4.index.jsp:
测试多个文件上传；
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <%@page import="java.util.*"%> 4 DOCTYPE html> 5 <html> 6 <head> 7 <meta charset="UTF-8"> 8 <title>Insert title heretitle> 9 head> 10 <body> 11 <form action="emp/testFileUpload" method="Post" 12 enctype="multipart/form-data"> 13 Files多个文件上传:<input type="file" multiple="multiple" name="files"> 14 <input type="submit" value="submit"> 15 form> 16 17 body> 18 html>
5.success.jsp
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 DOCTYPE html> 4 <html> 5 <head> 6 <meta charset="UTF-8"> 7 <title>Insert title heretitle> 8 head> 9 <body> 10 success 11 body> 12 html>
6.运行结果：
选择多个文件上传后，跳转到success.jsp页面且控制台打印选中的多个文件的文件名。
