一个简单的struts2上传图片的例子

说到上传图片,最近在赶一个项目,也遇到了要上传头像的难题,在网上搜了好久,都没有找到满意的答案。于是又选择了最原始的上传图片的方法,在此做个记录,谨作备忘之用。

首先是添加页面add_UI.jsp

<%@ 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="${basePath }js/datepicker/WdatePicker.js"></script>
</head>
<body class="rightBody">
<form id="form" name="form" action="${basePat }user/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>
    </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>

然后是UserAction.java

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

import javax.annotation.Resource;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;

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

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class UserAction extends BaseAction {
    
    @Resource 
    private UserService userService;
    
    private User user;
    
    private File headImg;
    private String headImgContentType;
    private String headImgFileName;
        //保存新增
    public String add(){
        try {
            if(user != null){
                //处理头像
                if(headImg != null){
                    //1、保存头像,保存头像文件到服务器中
                    String filePath = ServletActionContext.getServletContext().getRealPath("/upload/user");
                    String fileName = UUID.randomUUID().toString().replaceAll("-", "") + headImgFileName.substring(headImgFileName.lastIndexOf("."));
                    FileUtils.copyFile(headImg, new File(filePath, fileName));
                    
                    //2、设置到用户头像
                    user.setHeadImg("user/"+fileName);
                }
                //保存用户及其角色
                userService.saveUser(user);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "list";
    }    
public User getUser() {
        return user;
    }
    public void setUser(User user) {
        this.user = user;
    }
    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;
    }
}
注意:
headImg,
headImgContentType,headImgFileName这三个变量的名称不要改,因为改了可能不成功。
至于具体的saveUser(user)方法就是保存用户的方法啦,这里就不赘述了。
而其他ssh的配置文件和其他java待有空的时候再总结个demo出来吧。
原文地址:https://www.cnblogs.com/yeqrblog/p/4398914.html