我整理了一下，这个办法在Servlet上应该也用得上。其实文件上传主要的问题是在于存储路径的拼接。
这里我是把东西存在Web项目的WebContent目录下的
下面贴一些代码
目标应该是这样一个格式 Workspace\ProjectName\自定义目录\fileName
于是就有下面三段代码
然后直接拼接起来就行了。下面我直接贴代码吧
首先是jsp的form部分
<form action="upload" encType="multipart/form-data" method="post"> ???<label>选择文件</label> ???<input id="fileId" name="file" type="file"/> ???<input type="submit" value="提交"/> ???</form>
然后是Controller部分
@RequestMapping("/upload") ???public String uploadImg(HttpServletRequest request) throws IllegalStateException, IOException ???{ ???????//拼接文件存储的目录 ???????String temp=Thread.currentThread().getContextClassLoader().getResource("").getPath(); ????????int num=temp.indexOf(".metadata"); ???????String path=temp.substring(1,num).replace(‘/‘, ‘\\‘)+request.getContextPath().replaceAll("/", "")+"\\WebContent\\images\\"; ???????????????//上传文件 ???????List<String> list = FileUtil.upLoad(request, path); ???????request.setAttribute("path", list.get(0)); ???????System.out.println(list.get(0)); ??????return "uploadok"; ????????????}最后是我在FileUtil里封装的一个办法，其实我很纠结要不要单文件、多文件分开来。最后我使用List来返回存储的路径，后面可能会根据需要改
package com.yck.util;import java.io.File;import java.io.IOException;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Date;import java.util.Iterator;import java.util.List;import java.util.UUID;import javax.servlet.http.HttpServletRequest;import org.springframework.web.multipart.MultipartFile;import org.springframework.web.multipart.MultipartHttpServletRequest;import org.springframework.web.multipart.commons.CommonsMultipartResolver;public class FileUtil{ ???????public static List<String> upLoad(HttpServletRequest request,String path) ???{ ???????????????List<String> list = new ArrayList<String> (); ???//存放结果 ???????//1、将当前上下文初始化给CommonMutipartResolver ???????CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext()); ???????//2、检查Form中encType是否为multipart/form-data ???????if(multipartResolver.isMultipart(request)) ???????{ ???????????//将request转为MultipartHttpServletRequest ???????????MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request; ???????????//获取迭代器遍历multipartRequest里的文件名 ???????????Iterator<String> iter = multipartRequest.getFileNames(); ???????????while(iter.hasNext()) ???????????{ ???????????????//获取文件并向下遍历 ???????????????MultipartFile file = multipartRequest.getFile(iter.next().toString()); ???????????????if(file != null) ???????????????{ ???????????????????//获取文件类型，即后缀名 ???????????????????String str = file.getOriginalFilename(); ???????????????????String suffix = str.substring(str.lastIndexOf(".")); ???????????????????????????????????????//用 当前日期+UUID作为文件名避免重名 ???????????????????SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd"); ???????????????????String dateStr = sdf.format(new Date()).replaceAll("-", ""); ???????????????????String name = dateStr +UUID.randomUUID().toString().replaceAll("-", ""); ???????????????????????????????????????//拼接文件绝对路径 ???????????????????String filePath = path + name + suffix; ???????????????????try ???????????????????{ ???????????????????????file.transferTo(new File(filePath)); ???????????????????} catch (IllegalStateException | IOException e) ???????????????????{ ???????????????????????// TODO Auto-generated catch block ???????????????????????e.printStackTrace(); ???????????????????} ???????????????????list.add(filePath); ???????????????} ???????????} ???????} ???????return list; ???????????}}最后测试结果
控制台输出的路径也是符合预期的
E:\ckck\EclipseOxygen\MyWeb\WebContent\images\59fd10b473d4463686e1bffeaca5c46c.jpg
基于SSM框架的文件上传
原文地址：http://www.cnblogs.com/yeyeck/p/7442202.html