struts 头像上传

java代码：

 1 package cn.itcast.nsfw.user.action;

 import java.io.File;
 import java.io.IOException;
 import java.util.List;
 import java.util.UUID;

 import javax.annotation.Resource;

 import org.apache.commons.io.FileUtils;
 import org.apache.struts2.ServletActionContext;

 import cn.itcast.nsfw.user.entity.User;
 import cn.itcast.nsfw.user.service.UserService;

 import com.opensymphony.xwork2.ActionSupport;

 public class UserAction extends ActionSupport {

     @Resource
     private UserService userService;
     private List<User> userList;
     private User user;
     private String[] selectedRow;
     private File headImg;
     private String headImgContentType;
     private String headImgFileName;

     //列表页面
     public String listUI(){
         userList = userService.findObjects();
         return "listUI";
     }
     //跳转到新增页面
     public String addUI(){
         return "addUI";
     }
     //保存新增
     public String add(){
         try {
             if(user != null){
                 //处理头像
                 if(headImg != null){
                     //1、保存头像到upload/user
                     //获取保存路径的绝对地址
                     String filePath = ServletActionContext.getServletContext().getRealPath("upload/user");
                     String fileName = UUID.randomUUID().toString().replaceAll("-", "") + headImgFileName.substring(headImgFileName.lastIndexOf("."));
                     //复制文件
                     FileUtils.copyFile(headImg, new File(filePath, fileName));

                     //2、设置用户头像路径
                     user.setHeadImg("user/" + fileName);
                 }
                 userService.save(user);
             }
         } catch (Exception e) {
             e.printStackTrace();
         }
         return "list";
     }
     //跳转到编辑页面
     public String editUI(){
         if (user != null && user.getId() != null) {
             user = userService.findObjectById(user.getId());
         }
         return "editUI";
     }
     //保存编辑
     public String edit(){
         try {
             if(user != null){
                 //处理头像
                 if(headImg != null){
                     //1、保存头像到upload/user
                     //获取保存路径的绝对地址
                     String filePath = ServletActionContext.getServletContext().getRealPath("upload/user");
                     String fileName = UUID.randomUUID().toString().replaceAll("-", "") + headImgFileName.substring(headImgFileName.lastIndexOf("."));
                     //复制文件
                     FileUtils.copyFile(headImg, new File(filePath, fileName));

                     //2、设置用户头像路径
                     user.setHeadImg("user/" + fileName);
                 }

                 userService.update(user);
             }
         } catch (Exception e) {
             e.printStackTrace();
         }
         return "list";
     }
     //删除
     public String delete(){
         if(user != null && user.getId() != null){
             userService.delete(user.getId());
         }
         return "list";
     }
     //批量删除
     public String deleteSelected(){
         if(selectedRow != null){
             for(String id: selectedRow){
                 userService.delete(id);
             }
         }
         return "list";
     }
     public List<User> getUserList() {
         return userList;
     }
     public void setUserList(List<User> userList) {
         this.userList = userList;
     }
     public User getUser() {
         return user;
     }
     public void setUser(User user) {
         this.user = user;
     }
     public String[] getSelectedRow() {
         return selectedRow;
     }
     public void setSelectedRow(String[] selectedRow) {
         this.selectedRow = selectedRow;
     }
     public File getHeadImg() {
         return headImg;
     }
     public void setHeadImg(File headImg) {
         this.headImg = headImg;
     }
     public String getHeadImgContentType() {
         return headImgContentType;
     }
     public void setHeadImgContentType(String headImgContentType) {
         this.headImgContentType = headImgContentType;
     }
     public String getHeadImgFileName() {
         return headImgFileName;
     }
     public void setHeadImgFileName(String headImgFileName) {
         this.headImgFileName = headImgFileName;
     }

 }

头像上传jsp页面（采用struts标签）

 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
 <html>
 <head>
     <%@include file="/common/header.jsp"%>
     <title>用户管理</title>
     <script type="text/javascript" src="${basePath }js/datepicker/WdatePicker.js"></script>
 </head>
 <body class="rightBody">
 <form id="form" name="form" action="${basePath }nsfw/user_add.action" method="post" enctype="multipart/form-data">
     <div class="p_d_1">
         <div class="p_d_1_1">
             <div class="content_info">
     <div class="c_crumbs"><div><b></b><strong>用户管理</strong>&nbsp;-&nbsp;新增用户</div></div>
     <div class="tableH2">新增用户</div>
     <table id="baseInfo" width="100%" align="center" class="list" border="0" cellpadding="0" cellspacing="0"  >
         <tr>
             <td class="tdBg" width="200px">所属部门：</td>
             <td><s:select name="user.dept" list="#{'部门A':'部门A','部门B':'部门B' }"/></td>
         </tr>
         <tr>
             <td class="tdBg" width="200px">头像：</td>
             <td>
                 <input type="file" name="headImg"/>
             </td>
         </tr>
         <tr>
             <td class="tdBg" width="200px">用户名：</td>
             <td><s:textfield name="user.name"/> </td>
         </tr>
         <tr>
             <td class="tdBg" width="200px">帐号：</td>
             <td><s:textfield name="user.account"/></td>
         </tr>
         <tr>
             <td class="tdBg" width="200px">密码：</td>
             <td><s:textfield name="user.password"/></td>
         </tr>
         <tr>
             <td class="tdBg" width="200px">性别：</td>
             <td><s:radio list="#{'true':'男','false':'女'}" name="user.gender"/></td>
         </tr>
         <tr>
             <td class="tdBg" width="200px">角色：</td>
             <td></td>
         </tr>
         <tr>
             <td class="tdBg" width="200px">电子邮箱：</td>
             <td><s:textfield name="user.email"/></td>
         </tr>
         <tr>
             <td class="tdBg" width="200px">手机号：</td>
             <td><s:textfield name="user.mobile"/></td>
         </tr>
         <tr>
             <td class="tdBg" width="200px">生日：</td>
             <td><s:textfield id="birthday" name="user.birthday" readonly="true" onfocus="WdatePicker({'skin':'whyGreen','dateFmt':'yyyy-MM-dd'});" /></td>
         </tr>
         <tr>
             <td class="tdBg" width="200px">状态：</td>
             <td><s:radio list="#{'1':'有效','0':'无效'}" name="user.state" value="1"/></td>
         </tr>
         <tr>
             <td class="tdBg" width="200px">备注：</td>
             <td><s:textarea name="user.memo" cols="75" rows="3"/></td>
         </tr>
     </table>
     <div class="tc mt20">
         <input type="submit" class="btnB2" value="保存" />
         &nbsp;&nbsp;&nbsp;&nbsp;
         <input type="button"  onclick="javascript:history.go(-1)" class="btnB2" value="返回" />
     </div>
     </div></div></div>
 </form>
 </body>
 </html>

头像编辑页面：

 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
 <html>
 <head>
     <%@include file="/common/header.jsp"%>
     <title>用户管理</title>
     <script type="text/javascript" src="${basePath }js/datepicker/WdatePicker.js"></script>
 </head>
 <body class="rightBody">
 <form id="form" name="form" action="${basePath }nsfw/user_edit.action" method="post" enctype="multipart/form-data">
     <div class="p_d_1">
         <div class="p_d_1_1">
             <div class="content_info">
     <div class="c_crumbs"><div><b></b><strong>用户管理</strong>&nbsp;-&nbsp;编辑用户</div></div>
     <div class="tableH2">编辑用户</div>
     <table id="baseInfo" width="100%" align="center" class="list" border="0" cellpadding="0" cellspacing="0"  >
         <tr>
             <td class="tdBg" width="200px">所属部门：</td>
             <td><s:select name="user.dept" list="#{'部门A':'部门A','部门B':'部门B' }"/></td>
         </tr>
         <tr>
             <td class="tdBg" width="200px">头像：</td>
             <td>
                 <s:if test="%{user.headImg != null && user.headImg != ''}">
                     <img src="${basePath }upload/<s:property value='user.headImg'/>" width="100" height="100"/>
                     <s:hidden name="user.headImg"/>
                 </s:if>
                 <input type="file" name="headImg"/>
             </td>
         </tr>
         <tr>
             <td class="tdBg" width="200px">用户名：</td>
             <td><s:textfield name="user.name"/> </td>
         </tr>
         <tr>
             <td class="tdBg" width="200px">帐号：</td>
             <td><s:textfield name="user.account"/></td>
         </tr>
         <tr>
             <td class="tdBg" width="200px">密码：</td>
             <td><s:textfield name="user.password"/></td>
         </tr>
         <tr>
             <td class="tdBg" width="200px">性别：</td>
             <td><s:radio list="#{'true':'男','false':'女'}" name="user.gender"/></td>
         </tr>
         <tr>
             <td class="tdBg" width="200px">角色：</td>
             <td></td>
         </tr>
         <tr>
             <td class="tdBg" width="200px">电子邮箱：</td>
             <td><s:textfield name="user.email"/></td>
         </tr>
         <tr>
             <td class="tdBg" width="200px">手机号：</td>
             <td><s:textfield name="user.mobile"/></td>
         </tr>
         <tr>
             <td class="tdBg" width="200px">生日：</td>
             <td>
             <s:textfield id="birthday" name="user.birthday" readonly="true"
             onfocus="WdatePicker({'skin':'whyGreen','dateFmt':'yyyy-MM-dd'});" >
                 <s:param name="value"><s:date name="user.birthday" format="yyyy-MM-dd"/></s:param>
             </s:textfield>
             </td>
         </tr>
         <tr>
             <td class="tdBg" width="200px">状态：</td>
             <td><s:radio list="#{'1':'有效','0':'无效'}" name="user.state"/></td>
         </tr>
         <tr>
             <td class="tdBg" width="200px">备注：</td>
             <td><s:textarea name="user.memo" cols="75" rows="3"/></td>
         </tr>
     </table>
     <s:hidden name="user.id"/>
     <div class="tc mt20">
         <input type="submit" class="btnB2" value="保存" />
         &nbsp;&nbsp;&nbsp;&nbsp;
         <input type="button"  onclick="javascript:history.go(-1)" class="btnB2" value="返回" />
     </div>
     </div></div></div>
 </form>
 </body>
 </html>