javaee SpringMVC文件上传 项目结构

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>org.example</groupId><artifactId>TestSpringMVC5</artifactId><version>1.0-SNAPSHOT</version><packaging>war</packaging><name>TestSpringMVC5 Maven Webapp</name><!-- FIXME change it to the project's website --><url>http://www.example.com</url><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><maven.compiler.source>1.7</maven.compiler.source><maven.compiler.target>1.7</maven.compiler.target></properties><dependencies><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.11</version><scope>test</scope></dependency><!-- Spring --><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>4.3.18.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>4.3.18.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-beans</artifactId><version>4.3.18.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context-support</artifactId><version>4.3.18.RELEASE</version></dependency><!-- 导入SpringMvc 需要的jar包 --><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>4.3.18.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>4.3.18.RELEASE</version></dependency><!-- 配置servlet--><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>3.1.0</version><scope>provided</scope></dependency><!-- jstl --><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId><version>1.2</version></dependency><!-- 1.2以下的版本 需要加standard架包 --><!--<dependency><groupId>taglibs</groupId><artifactId>standard</artifactId><version>1.1.2</version></dependency>--><!--配置jsp的依赖 --><dependency><groupId>javax.servlet.jsp</groupId><artifactId>jsp-api</artifactId><version>2.2</version><scope>provided</scope></dependency><!-- 添加 json 转换包 springmvc支持的可以自己调用 --><dependency><groupId>com.google.code.gson</groupId><artifactId>gson</artifactId><version>2.2.4</version></dependency><!-- json依赖 --><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.47</version></dependency><!-- 文件上传需要的jar包--><!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload --><dependency><groupId>commons-fileupload</groupId><artifactId>commons-fileupload</artifactId><version>1.3.1</version></dependency><!-- https://mvnrepository.com/artifact/commons-io/commons-io --><dependency><groupId>commons-io</groupId><artifactId>commons-io</artifactId><version>2.4</version></dependency></dependencies><build><finalName>TestSpringMVC5</finalName><pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) --><plugins><plugin><artifactId>maven-clean-plugin</artifactId><version>3.1.0</version></plugin><!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging --><plugin><artifactId>maven-resources-plugin</artifactId><version>3.0.2</version></plugin><plugin><artifactId>maven-compiler-plugin</artifactId><version>3.8.0</version></plugin><plugin><artifactId>maven-surefire-plugin</artifactId><version>2.22.1</version></plugin><plugin><artifactId>maven-war-plugin</artifactId><version>3.2.2</version></plugin><plugin><artifactId>maven-install-plugin</artifactId><version>2.5.2</version></plugin><plugin><artifactId>maven-deploy-plugin</artifactId><version>2.8.2</version></plugin></plugins></pluginManagement></build>
</project>

修改配置文件

<?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:p="http://www.springframework.org/schema/p"xmlns:context="http://www.springframework.org/schema/context"xmlns:mvc="http://www.springframework.org/schema/mvc"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"><!-- 1. 配置  需要扫描的控制层在哪个包  --><context:component-scan base-package="com.test"></context:component-scan><!-- 2 配置 视图解析器 中的 前缀和后缀  --><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><!-- 设置前缀  --><property name="prefix" value="/WEB-INF/"/><!-- 设置后缀 --><property name="suffix" value=".jsp"/></bean><!-- 开启注解驱动注册了两个数据转换的注解@NumberFormatannotation支持，@DateTimeFormatjson相关的。。--><mvc:annotation-driven></mvc:annotation-driven><!-- 放行静态资源location:静态资源的真实路径mapping:访问路径（可以自定义）放行static文件夹下的所有的文件--><mvc:resources mapping="/static/**" location="/static/" />
<!--    <mvc:resources mapping="/static/**" location="/WEB-INF/static/" />--><!-- multipartResolver配置 id必须为multipartResolver
MultipartResolver 用于处理文件上传，当收到请求时 DispatcherServlet 的 checkMultipart() 方法会调用 MultipartResolver 的 isMultipart() 方法判断请求中是否包含文件。如果请求数据中包含文件，则调用 MultipartResolver 的 resolveMultipart() 方法对请求的数据进行解析，然后将文件数据解析成 MultipartFile 并封装在 MultipartHttpServletRequest (继承了 HttpServletRequest) 对象中，最后传递给 Controller--><bean id="multipartResolver"class="org.springframework.web.multipart.commons.CommonsMultipartResolver"p:defaultEncoding="UTF-8"p:maxUploadSize="5242880"p:uploadTempDir="file:/e:/file/temp"/></beans>

jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<body>
<h2>Hello World!</h2><form action="users/uploadFile" method="post" enctype="multipart/form-data">上传图片:<input type="file" name="myfile" /><input type="submit" name="sub" value="提交" /></form></body>
</html>

java

package com.test.controller;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;import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.IOException;@Controller
@RequestMapping("/users")
public class UsersController {@RequestMapping("/uploadFile")public String uploadFile(@RequestParam("myfile") MultipartFile myfile, HttpServletRequest request){String filename=  myfile.getOriginalFilename();System.out.println(filename);//将文件从临时存储的位置转移到指定的位置(永久存储)try {//myfile.transferTo(new File("e:/file/upload/"+filename));//myfile.transferTo(new File("D:\\idea_workspace\\SpringMVC\\TestSpringMVC5\\target\\TestSpringMVC5\\static\\images"));//获取项目上传到的服务器端地址String path=request.getSession().getServletContext().getRealPath("/static/images");System.out.println(path);myfile.transferTo(new File(path+"/"+filename));} catch (IOException e) {e.printStackTrace();}return "success";}}

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>Archetype Created Web Application</display-name><!-- 注册过滤器  设置编码 --><filter><filter-name>CharacterEncodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><init-param><param-name>encoding</param-name><param-value>utf-8</param-value></init-param><init-param><param-name>forceResponseEncoding</param-name><param-value>true</param-value></init-param></filter><filter-mapping><filter-name>CharacterEncodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><!-- 加入前端控制器 DispatcherServlet --><servlet><servlet-name>dispatcherServlet</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><!-- 设置 DispatcherServlet 的参数 --><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:springmvc.xml</param-value></init-param><!-- 1 启动服务器的时候就加载  --><!-- 0 使用的时候再加载 --><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>dispatcherServlet</servlet-name><url-pattern>/</url-pattern></servlet-mapping></web-app>

success.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%String baseurl=request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+request.getContextPath();pageContext.setAttribute("baseurl",baseurl);
%>
<html>
<base href="${baseurl}" />
<head><title>Title</title>
</head>
<body>
success
<img src="${baseurl}/static/images/3.jpg" />
</body>
</html>

项目结构