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layui上传图片详解（附代码）

时间：2021-07-01 10:21:17 帮助过：760人阅读

layui上传与bootstrap上传相似，只是不需要下插件，

layui自带的已够用先看一下前台界面，这里是用到的上传头像

先点击开始上传，头像上传至服务器中，

返回json添加至form表单中，与其他数据一起提交

先看一下jsp界面

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>个人资料</title>
<link href="${pageContext.request.contextPath }/js/layui/css/layui.css"
    rel="stylesheet" />
<script src="${pageContext.request.contextPath }/js/layui/layui.js"
    charset="utf-8"></script>
<script src="${pageContext.request.contextPath }/js/jquery-1.8.3.js"></script>
<script type="text/javascript">
        layui.use('upload',function(){
            var upload = layui.upload;
            upload.render({
                elem: '#fileBtn'
                ,url: '../updatePersonalById.do'
                ,accept: 'file'
                ,auto: false
                ,bindAction: '#uploadBtn'
                ,done: function(res){
                    alert(res.data.src);
                    $("[name=userImage]").val(res.data.src);
                }
            });
        });
    </script>

</head>
<body>
    <form class="layui-form" action="../updatePersonalByIdSuccess.do" method="post" charset="utf-8" target="_parent">
         <div class="layui-form-item" style="margin-top: 20px;">
            <label class="layui-form-label">编号</label>
            <div class="layui-input-block">
              <input type="text" name="userId" required  lay-verify="required" value="${ui.userId }" autocomplete="off" readonly="readonly" class="layui-input">
            </div>
          </div>
           <div class="layui-form-item" style="margin-top: 20px;">
            <label class="layui-form-label">登录名</label>
            <div class="layui-input-block">
              <input type="text" name="userName" required  lay-verify="required" value="${ui.userName }" autocomplete="off" readonly="readonly" class="layui-input">
            </div>
          </div>
           <div class="layui-form-item" style="margin-top: 20px;">
            <label class="layui-form-label">密码</label>
            <div class="layui-input-block">
              <input type="password" name="userPwd" required  lay-verify="required" value="${ui.userPwd }" autocomplete="off" class="layui-input">
            </div>
          </div>
          <div class="layui-form-item" style="margin-top: 20px;">
            <label class="layui-form-label">确认密码</label>
            <div class="layui-input-block">
              <input type="password" name="reuserPwd" required  lay-verify="required" value="${ui.userPwd }" autocomplete="off" class="layui-input">
            </div>
          </div>
           <div class="layui-form-item" style="margin-top: 20px;">
            <label class="layui-form-label">真实姓名</label>
            <div class="layui-input-block">
              <input type="text" name="userrealName" required  lay-verify="required" value="${ui.userrealName }" autocomplete="off" class="layui-input">
            </div>
          </div>
           <div class="layui-form-item" style="margin-top: 20px;">
            <label class="layui-form-label">电话</label>
            <div class="layui-input-block">
              <input type="text" name="userPhone" required  lay-verify="required" value="${ui.userPhone }" autocomplete="off" class="layui-input">
            </div>
          </div>
           <div class="layui-form-item" style="margin-top: 20px;">
            <label class="layui-form-label">地址</label>
            <div class="layui-input-block">
              <input type="text" name="userAds" required  lay-verify="required" value="${ui.userAds }" autocomplete="off" class="layui-input">
            </div>
          </div>
          <div class="layui-upload">
                <label class="layui-form-label">头像:</label>
                <div class="layui-upload layui-input-block">
                    <input type="hidden" name="userImage" value="${ui.userImage }" required lay-verify="required" />
                    <button type="button" class="layui-btn layui-btn-primary" id="fileBtn"><i class="layui-icon">&#xe67c;</i>选择文件</button>
                    <button type="button" class="layui-btn layui-btn-warm" id="uploadBtn">开始上传</button>
                </div>
            </div>
             <div class="layui-form-item" style="margin-top: 20px;">
                  <div class="layui-input-block">
                  <button class="layui-btn" id="btn1" lay-submit lay-filter="formDemo">提交</button>
                  <button type="reset" class="layui-btn layui-btn-primary">重置</button>
                </div>
             </div>
          
    </form>
</body>
</html>

与Controller交互的.do

package com.supermanager.controller;

import java.io.File;
import java.io.IOException;
import java.util.Date;
import java.util.List;
import java.util.Random;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;

import com.supermanager.entity.LogsInfo;
import com.supermanager.entity.RoleInfo;
import com.supermanager.entity.StoragesInfo;
import com.supermanager.entity.UserInfo;
import com.supermanager.service.LogsService;
import com.supermanager.service.RoleInfoService;
import com.supermanager.service.StoragesService;
import com.supermanager.service.UserInfoService;

import net.sf.json.JSONArray;

@Controller
@Scope("prototype")
public class UserInfoController {

    @Resource
    private UserInfoService userInfoService;
    @Resource
    private LogsService logService;
    @Resource
    private RoleInfoService roleInfoService;
    @Resource
    private StoragesService storagesService;
    

    /**
     * 修改个人资料
     * @param session
     * @param file
     * @param ui
     * @return
     * @throws IOException 
     * @throws IllegalStateException 
     */
    @RequestMapping(value="updatePersonalById")
    public @ResponseBody String updatePersonal(@RequestParam("file") MultipartFile file,@ModelAttribute UserInfo ui,HttpServletRequest request) throws IllegalStateException, IOException{
        String oldName = file.getOriginalFilename();
        String path = request.getServletContext().getRealPath("/upload/");
        String fileName = changeName(oldName);
        String rappendix = "upload/" + fileName;
        fileName = path + "/" + fileName;
        File file1 = new File(fileName);
        file.transferTo(file1);
        String str = "{\"code\": 0,\"msg\": \"\",\"data\": {\"src\":\"" + rappendix + "\"}}";
        return str;
    }
    public static String changeName(String oldName){
        Random r = new Random();
        Date d = new Date();
        String newName = oldName.substring(oldName.indexOf('.'));
        newName = r.nextInt(99999999) + d.getTime() + newName;
        return newName;
    }
    @RequestMapping(value="updatePersonalByIdSuccess")
    public  String updatePersonalByIdSuccess(@ModelAttribute UserInfo ui){
        UserInfo uif = userInfoService.FindUserByUserId(ui.getUserId());
        ui.setRoleId(uif.getRoleId());
        ui.setUserSex(uif.getUserSex());
        ui.setUserAge(uif.getUserAge());
        int a = userInfoService.Update(ui);
        if(a!=0){
            return "redirect:exitSystem.do";
        }
        return "error";
    }
    
    
    
}

上传成功之后的效果如图

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