jar包
配置文件
web.xml
<servlet>
???????<servlet-name>MyDispatcher</servlet-name> ?
???????<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> ?
???????<!-- 设置自己定义的控制器xml文件 --> ?
???????<init-param> ?
???????????<param-name>contextConfigLocation</param-name> ?
???????????<param-value>classpath:mvc.xml</param-value> ?
???????</init-param> ?
???????<load-on-startup>1</load-on-startup> ?
???</servlet> ?
???<!-- Spring MVC配置文件结束 --> ?
?
???<!-- 拦截设置 --> ?
???<servlet-mapping> ?
???????<servlet-name>MyDispatcher</servlet-name> ?
???????<!-- 由SpringMVC拦截所有请求 --> ?
???????<url-pattern>/</url-pattern> ?
???</servlet-mapping>
spring mvc.xml
<!-- 上传文件的设置 ，maxUploadSize=-1，表示无穷大。uploadTempDir为上传的临时目录 -->
???????<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="defaultEncoding" value="UTF-8"></property>
<property name="maxUploadSize" value="5400000"></property>
<property name="uploadTempDir" value="fileUpload/temp"></property> ??
??????</bean>
前台页面fileUpload.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
???pageEncoding="UTF-8"%> ?
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%> ?
<% ?
???String path = request.getContextPath(); ?
???String basePath = request.getScheme() + "://" ?
???????????+ request.getServerName() + ":" + request.getServerPort() ?
???????????+ path + "/"; ?
%> ?
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> ?
<html> ?
<head> ?
<title>上传图片测试</title> ?
<base href="<%=basePath%>"> ?
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> ?
</head> ?
<body> ?
???<center> ?
???????<form action="file/upfile" ?
???????????method="post" enctype="multipart/form-data"> ?
???????????<input type="file" name="file" /> ??
???????????<input type="submit" value="上 传" /> ?
???????</form> ?
???????<h5>效果：</h5> ?
???????<img alt="图片" src="${file}" /> ?
???</center> ?
</body> ?
</html> ?
controller 层
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.UUID;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.commons.CommonsMultipartFile;
@Controller ?
@RequestMapping("/file") ?
public class FileController { ?
?
???@RequestMapping("/toFile") ?
???public String toFileUpload() { ?
???????return "fileUpload"; ?
???} ?
?
???@RequestMapping("/toFile2") ?
???public String toFileUpload2() { ?
???????return "fileUpload2"; ?
???} ?
?
???/**
????* 上传文件
????*/ ?
???@RequestMapping("/upfile") ?
???public String oneFileUpload( ?
???????????@RequestParam("file") CommonsMultipartFile file, ?
???????????HttpServletRequest request, ModelMap model) { ?
?
???????// 获得原始文件名 ?
???????String fileName = file.getOriginalFilename(); ?
???????System.out.println("原始文件名:" + fileName); ?
?
???????// 新文件名 ?
???????String newFileName = UUID.randomUUID() + fileName; ?
?
???????// 获得项目的路径 ?
???????ServletContext sc = request.getSession().getServletContext(); ?
???????// 上传位置 ?
???????String path = sc.getRealPath("/img") + "/"; // 设定文件保存的目录 ?
?
???????File f = new File(path); ?
???????if (!f.exists()) ?
???????????f.mkdirs(); ?
???????if (!file.isEmpty()) { ?
???????????try { ?
???????????????FileOutputStream fos = new FileOutputStream(path + newFileName); ?
???????????????InputStream in = file.getInputStream(); ?
???????????????int b = 0; ?
???????????????while ((b = in.read()) != -1) { ?
???????????????????fos.write(b); ?
???????????????} ?
???????????????fos.close(); ?
???????????????in.close(); ?
???????????} catch (Exception e) { ?
???????????????e.printStackTrace(); ?
???????????} ?
???????} ?
?
???????System.out.println("上传图片到:/img/" + newFileName); ?
???????// 保存文件地址，用于JSP页面回显 ?
???????String url = "/file/"+newFileName;
???????model.addAttribute("file", url); ?
???????return "fileUpload"; ?
???}
} ?
注意 配置Tomact 中service.xml 在<host></host>中加入
<Context path="/file" docBase="D:\Program Files\Tomcat7.0\webapps\SSM\img" debug="0" reloadable="true"/>
SSM 实现文件上传
原文地址：https://www.cnblogs.com/ll0405/p/8303758.html