文件上传步骤
1.写一个文件上传的页面
2.写一个文件上传的控制器
注意：
1.method="post"
2.enctype="multipart/form-data"
3.文件类型上传组件 type="file"
4.接收文件参数需要使用MultipartFile 类型的参数
5.配置文件解析器，文件解析器 id 必须是 "multipartResolver"
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 </head> 9 <body> 10 <form action="upload.do" method="post" enctype="multipart/form-data"> 11 姓名：<input type="text" name="username"><br> 12 头像：<input type="file" name="mf"><br> 13 <input type="submit" value="上传"> 14 </form> 15 </body> 16 </html>
upload.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 </head>
9 <body>
10 <h1>欢迎进入</h1>
11 <img alt="程序猿" src="${imgPath }">
12 </body>
13 </html>
show.jsp
1 package com.xcz.controller;
2
3 import java.io.File;
4 import java.io.IOException;
5
6 import javax.servlet.http.HttpServletRequest;
7
8 import org.springframework.stereotype.Controller;
9 import org.springframework.web.bind.annotation.RequestMapping;
10 import org.springframework.web.multipart.MultipartFile;
11
12 @Controller
13 public class UploadController {
14 @RequestMapping("/toUpload.do")
15 public String toUpload() {
16 return "upload";
17 }
18
19 @RequestMapping("/upload.do")
20 public String upload(String username, MultipartFile mf, HttpServletRequest request) {
21 String path = request.getServletContext().getRealPath("images");
22 String orname = mf.getOriginalFilename();
23 String fileName = System.currentTimeMillis() + orname.substring(orname.lastIndexOf("."));
24 String filePath = path + "/" + fileName;
25 File file = new File(filePath);
26 try {
27 mf.transferTo(file);
28 request.setAttribute("imgPath", "images/" + fileName);
29 } catch (IOException e) {
30 e.printStackTrace();
31 }
32 return "show";
33 }
34 }
UploadController
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:lang="http://www.springframework.org/schema/lang"
6 xmlns:mvc="http://www.springframework.org/schema/mvc"
7 xmlns:util="http://www.springframework.org/schema/util"
8 xmlns:task="http://www.springframework.org/schema/task"
9 xmlns:aop="http://www.springframework.org/schema/aop"
10 xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd
11 http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.1.xsd
12 http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
13 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
14 http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-4.1.xsd
15 http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
16 http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsd">
17 <!-- 开启组件扫描 -->
18 <context:component-scan base-package="com.xcz"></context:component-scan>
19 <!-- 开启mvc标注 -->
20 <mvc:annotation-driven></mvc:annotation-driven>
21 <!-- 配置视图处理器 -->
22 <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
23 <property name="prefix" value="/WEB-INF/"></property>
24 <property name="suffix" value=".jsp"></property>
25 </bean>
26 <!-- 配置一个文件解析器 -->
27 <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
28 <property name="maxUploadSize" value="102400"></property>
29 <property name="resolveLazily" value="true"></property>
30 </bean>
31 <!-- 引入外部db.properties -->
32 <context:property-placeholder location="classpath:db.properties"/>
33 <!-- 配置数据源 -->
34 <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
35 <property name="driverClassName" value="${driverClassName}"></property>
36 <property name="url" value="${url}"></property>
37 <property name="username" value="${jdbc.username}"></property>
38 <property name="password" value="${jdbc.password}"></property>
39 </bean>
40 </beans>
mvc.xml
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 version="3.1"> 6 <display-name>SpringMVC-06</display-name> 7 <welcome-file-list> 8 <welcome-file>index.html</welcome-file> 9 <welcome-file>index.htm</welcome-file> 10 <welcome-file>index.jsp</welcome-file> 11 <welcome-file>default.html</welcome-file> 12 <welcome-file>default.htm</welcome-file> 13 <welcome-file>default.jsp</welcome-file> 14 </welcome-file-list> 15 <!-- 配置请求入口 --> 16 <servlet> 17 <servlet-name>SpringMVC</servlet-name> 18 <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 19 <!-- 配置初始化参数 --> 20 <init-param> 21 <param-name>contextConfigLocation</param-name> 22 <param-value>classpath:mvc.xml</param-value> 23 </init-param> 24 <load-on-startup>1</load-on-startup> 25 </servlet> 26 <servlet-mapping> 27 <servlet-name>SpringMVC</servlet-name> 28 <url-pattern>*.do</url-pattern> 29 </servlet-mapping> 30 <!-- 配置编码过滤器 --> 31 <filter> 32 <filter-name>filterEncoding</filter-name> 33 <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> 34 <init-param> 35 <param-name>encoding</param-name> 36 <param-value>utf-8</param-value> 37 </init-param> 38 </filter> 39 <filter-mapping> 40 <filter-name>filterEncoding</filter-name> 41 <url-pattern>*.do</url-pattern> 42 </filter-mapping> 43 </web-app>
web.xml
原文地址：https://www.cnblogs.com/resultset/p/9944507.html
时间： 2024-08-23 13:41:24