springMVC实现文件上传

一、创建项目

二、引入依赖

三、web.xml

四、编写上传文件的jsp页面

五、spring-mvc.xml

六、controller

七、运行

一、创建项目

二、引入依赖

<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.qcby</groupId><artifactId>springMVC15</artifactId><version>1.0-SNAPSHOT</version><packaging>war</packaging><properties><maven.compiler.source>8</maven.compiler.source><maven.compiler.target>8</maven.compiler.target><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><!--版本锁定--><spring.version>5.0.2.RELEASE</spring.version></properties><dependencies><dependency><groupId>org.springframework</groupId><artifactId>spring-context</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><dependency><groupId>javax.servlet</groupId><artifactId>servlet-api</artifactId><version>2.5</version><scope>provided</scope></dependency><dependency><groupId>javax.servlet.jsp</groupId><artifactId>jsp-api</artifactId><version>2.0</version><scope>provided</scope></dependency><!--导入文件上传的jar报包,下面这两个都是--><dependency><groupId>commons-fileupload</groupId><artifactId>commons-fileupload</artifactId><version>1.3.1</version></dependency><dependency><groupId>commons-io</groupId><artifactId>commons-io</artifactId><version>2.4</version></dependency></dependencies></project>

三、web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"version="4.0"><!--配置解决中文乱码问题的过滤器--><filter><filter-name>characterEncodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><!--指定使用编码集--><init-param><param-name>encoding</param-name><param-value>UTF-8</param-value></init-param></filter><filter-mapping><filter-name>characterEncodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><!--前端控制器--><servlet><servlet-name>DispatcherServlet</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><!--配置初始化参数--><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring-mvc.xml</param-value></init-param><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>DispatcherServlet</servlet-name><url-pattern>*.do</url-pattern></servlet-mapping>
</web-app>

四、编写上传文件的jsp页面

index.jsp

<%--Created by IntelliJ IDEA.User: lenovoDate: 2024/11/7Time: 21:50To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><title>Title</title>
</head>
<body>
<h3>文件上传</h3>
<form action="fileupload.do" method="post" enctype="multipart/form-data">选择文件：<input type="file" name="upload" /><br/><input type="submit" value="上传" />
</form>
</body>
</html>

五、spring-mvc.xml

spring-mvc.xml里配置文件解析器

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:context="http://www.springframework.org/schema/context"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd"><!-- 配置spring创建容器时要扫描的包 --><context:component-scan base-package="com.qcby"></context:component-scan><!--配置视图解析器，进行页面的跳转--><bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"><!--跳转的页面的路径--><property name="prefix" value="/WEB-INF/pages/" /><!--跳转页面的后缀名称--><property name="suffix" value=".jsp" /></bean><!--配置文件上传的解析器组件。id的名称是固定，不能乱写--><bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"><!--设置上传文件的总大小 8M = 8 * 1024 * 1024 --><property name="maxUploadSize" value="8388608" /></bean><!--让映射器、适配器和处理器生效(默认不配置也是可以的)--><mvc:annotation-driven/>
</beans>

六、controller

UploadController类

package com.qcby.controller;import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.multipart.MultipartFile;import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.IOException;
import java.util.UUID;@Controller
public class UploadController {@RequestMapping("/fileupload.do")public String upload(MultipartFile upload, HttpServletRequest request) throws IOException {// 把文件上传到哪个位置String realPath = request.getSession().getServletContext().getRealPath("/uploads");// 创建该文件夹File file = new File(realPath);// 判断该文件夹是否存在if(!file.exists()){// 创建文件夹file.mkdirs();}// 获取到上传文件的名称String filename = upload.getOriginalFilename();// 把文件的名称修改成为一的值 sdfs-csdf-fwer-sdfwString uuid = UUID.randomUUID().toString().replace("-", "").toUpperCase();// 唯一的值filename = uuid+"_"+filename;System.out.println("文件名称："+filename);// 上传文件upload.transferTo(new File(file,filename));return "success";}
}