图片上传/文件上传
1. 创建一个web项目 新建一个JSP
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'index.jsp' starting page</title> </head> <body> <form action="<%=request.getContextPath()%>/upload.action" method="post" enctype="multipart/form-data"> 请选择上传的文件/图片： <input type="file" name="file"/> <!-- 请选择上传的图片： --> <!-- <input type="file" name="file" accept="image/*" /> --> <input type="submit" value="上传"/> </form> </body> </html>
2 web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <display-name></display-name> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <servlet> <servlet-name>SpringMVC</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:SpringMVC.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>SpringMVC</servlet-name> <url-pattern>*.action</url-pattern> </servlet-mapping> <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> </filter> <filter-mapping> <filter-name>CharacterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param> </web-app>
3 applicationContext.xml
4 SpringMVC.xml
<beans>
<!-- 很重要 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="defaultEncoding" value="utf-8"></property> </bean>
</beans>
5 Controller：
package com.bwie.controller; import java.io.File; import java.io.IOException; import java.util.UUID; import javax.servlet.http.HttpServletRequest; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.multipart.MultipartFile; import org.springframework.web.multipart.MultipartHttpServletRequest; @Controller public class PowerController { @RequestMapping("upload") public void upload(HttpServletRequest request){ //获取支持文件上传的Request对象 MultipartHttpServletRequest MultipartHttpServletRequest mtpreq = (MultipartHttpServletRequest) request; //通过 mtpreq 获取文件域中的文件 MultipartFile file = mtpreq.getFile("file"); //通过MultipartFile 对象获取文件的原文件名 String fileName = file.getOriginalFilename(); //生成一个uuid 的文件名 UUID randomUUID = UUID.randomUUID(); //获取文件的后缀名 int i = fileName.lastIndexOf("."); String uuidName = randomUUID.toString()+fileName.substring(i); //获取服务器的路径地址（被上传文件的保存地址） String realPath = request.getSession().getServletContext().getRealPath("/file"); //将路径转化为文件夹 并 判断文件夹是否存在 File dir = new File(realPath); if(!dir.exists()){ dir.mkdir(); } //获取一个文件的保存路径 String path = realPath+"/"+uuidName; // 为文件这服务器中开辟一给新的空间,*没有数据 // File newFile = new File(path); try { file.transferTo(new File(path)); } catch (IllegalStateException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } System.err.println("-----服务器的路径地址为：:"+realPath); System.err.println("-----图片名称为：:"+fileName); System.err.println("-----图片新名称为：:"+uuidName); System.err.println("-----图片新路径为：:"+path); } }
