若依前后端分离 Vue el-upload单图片上传

参考于:原文链接:https://blog.csdn.net/qq_42751248/article/details/107326737

一、前端相关:

<!--:action里面放图片上传调取的后台方法 :headers设置上传的请求头部,使请求携带自定义token,获取访问权限 -->
<!--:on-success图片上传成功后的回调方法,用于拿到图片存储路径等信息-->
<!--:before-upload图片上传前的逻辑判断,例如判断图片大小,格式等-->
<!--:on-preview图片预览方法 :on-remove图片删除方法 list-type代表文件列表的类型 -->
<!--file-list存放成功上传图片列表,这里此属性用于修改功能时页面已有图片的显示-->

<el-form-item label="预览缩略图" prop="articleImg" label-width="40">
              <el-upload
                :action="imgUpload.url"
                :headers="imgUpload.headers"
                list-type="picture-card"
                :limit="limit"
                :on-exceed="handleExceed"
                :on-success="handlePictureSuccess"
                :before-upload="beforeAvatarUpload"
                :on-preview="handlePictureCardPreview"
                :file-list="fileList"
              >
                <i class="el-icon-plus"></i>
              </el-upload>
              <el-dialog :visible.sync="dialogVisible">
                <img width="100%" v-if="imageUrl" :src="imageUrl" alt="">
              </el-dialog>
            </el-form-item>

 

二、属性值方法的定义:

export default {
  name: "Article",
  data() {
    return {
    // 图片数量限制
    limit: 1,
    //页面上存的暂时图片地址List
      fileList: [{url: ""}],
    //图片地址
      imageUrl: "",
      dialogVisible: false,
      imgUpload: {
          // 设置上传的请求头部
          headers: {
            Authorization: "Bearer " + getToken()
          },
          // 图片上传的方法地址:
          url: process.env.VUE_APP_BASE_API + "/forum/forum/multiPicturesUpload",
      }
    };
},
methods: {
// 表单重置
 reset()
{
  ...... 忽略其它   
this.fileList = undefined;
  this.resetForm("form"); }
/** 修改按钮操作 */ handleUpdate(row) { this.reset(); this.getTreeSelect(); const articleId = row.articleId || this.ids; getArticle(articleId).then(response => { this.fileList = [{ url: process.env.VUE_APP_BASE_API + response.data.articleImg}]
   this.form = response.data; this.open = true; this.title = "修改文章"; }); }, /** 提交按钮 */ submitForm: function() { this.form.articleImg = this.imageUrl; // 注:重要(用于添加到数据库) this.$refs["form"].validate(valid => { if (valid) { if (this.form.articleId != undefined) { updateArticle(this.form).then(response => { this.$modal.msgSuccess("修改成功"); this.open = false; this.getList(); }); } else { addArticle(this.form).then(response => { this.$modal.msgSuccess("新增成功"); this.open = false; this.getList(); }); } } }); }, //图片上传前的相关判断 beforeAvatarUpload(file) { const isJPG = file.type === 'image/jpeg' || file.type == 'image/png'; const isLt2M = file.size / 1024 / 1024 < 5; if (!isJPG) { this.$message.error('上传头像图片只能是 JPG/PNG 格式!'); } if (!isLt2M) { this.$message.error('上传头像图片大小不能超过 5MB!'); } return isJPG && isLt2M; }, //图片预览 handlePictureCardPreview(file) { this.imageUrl = file.url; this.dialogVisible = true; }, //图片上传成功后的回调 handlePictureSuccess(res, file) { //设置图片访问路径 (articleImg 后台传过来的的上传地址) this.imageUrl = file.response.articleImg; }, // 文件个数超出 handleExceed() { this.$modal.msgError(`上传链接LOGO图片数量不能超过 ${this.limit} 个!`); }, } };

注:在提交事件中添加:this.form.articleImg = this.imageUrl;

 

三、效果如下:

 

 

 

四、后台上传图片方法代码:

注:articleImg传给了前端 handlePictureSuccess回调方法中
/**
     * 缩略图上传
     */
    @Log(title = "预览缩略图", businessType = BusinessType.UPDATE)
    @PostMapping("/articleImg")
    public AjaxResult uploadFile(MultipartFile file) throws IOException
    {
        if (!file.isEmpty())
        {
            String articleImg = FileUploadUtils.upload(RuoYiConfig.getArticleImgPath(), file);
            if (!StringUtils.isEmpty(articleImg))
            {
                AjaxResult ajax = AjaxResult.success();
                ajax.put("articleImg", articleImg);
                return ajax;
            }
        }
        return AjaxResult.error("上传图片异常,请联系管理员");
    }

 

 

1、文件上传工具类: FileUploadUtils

 /**
     * 根据文件路径上传
     *
     * @param baseDir 相对应用的基目录
     * @param file 上传的文件
     * @return 文件名称
     * @throws IOException
     */
    public static final String upload(String baseDir, MultipartFile file) throws IOException
    {
        try
        {
            return upload(baseDir, file, MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION);
        }
        catch (Exception e)
        {
            throw new IOException(e.getMessage(), e);
        }
    }

2、读取项目相关配置:RuoYiConfig

package com.ruoyi.common.config;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

/**
 * 读取项目相关配置
 * 
 * @author ruoyi
 */
@Component
@ConfigurationProperties(prefix = "ruoyi")
public class RuoYiConfig
{/** 上传路径 */
    private static String profile;
public static String getProfile()
    {
        return profile;
    }

    public void setProfile(String profile)
    {
        RuoYiConfig.profile = profile;
    }
/**
     * 获取导入上传路径
     */
    public static String getImportPath()
    {
        return getProfile() + "/import";
    }/**
     * 获取预览缩略图上传路径
     * @return
     */
    public static String getArticleImgPath()
    {
        return getProfile() + "/articleImg";
    }
    /**
     * 获取下载路径
     */
    public static String getDownloadPath()
    {
        return getProfile() + "/download/";
    }

    /**
     * 获取上传路径
     */
    public static String getUploadPath()
    {
        return getProfile() + "/upload";
    }
}

 

posted @ 2022-03-28 11:21  爱学习的疯倾  阅读(12263)  评论(3编辑  收藏  举报