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Element ui图片上传

前言

对于广大小白来说,图片上传简直是上传难,难于上青天!废话不多说,步入正题,您就瞧好吧!

步骤一:前端使用element ui组件(upload上传)

我个人喜欢使用第二个组件:

element ui代码如下:

样式在此我不做过多解释,大家自行调试!

action(必须填写)就是我们图片要上传的地址,待会我会在下面展示我的前端实战代码

show-file-list:是否显示已上传文件列表(这句话不用删也不用管,留着即可)

before-upload

:使用

before-upload

限制用户上传的图片格式和大小。(我一般都会删除)

注意!!!

on-success很重要,这个方法是文件上传成功时的钩子,必须借助它实现功能!!!

<el-upload
  class="avatar-uploader"
  action="https://jsonplaceholder.typicode.com/posts/"
  :show-file-list="false"
  :on-success="handleAvatarSuccess"
  :before-upload="beforeAvatarUpload">
  <img v-if="imageUrl" :src="imageUrl" class="avatar">
  <i v-else class="el-icon-plus avatar-uploader-icon"></i>
</el-upload>

<style>
  .avatar-uploader .el-upload {
    border: 1px dashed #d9d9d9;
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
  }
  .avatar-uploader .el-upload:hover {
    border-color: #409EFF;
  }
  .avatar-uploader-icon {
    font-size: 28px;
    color: #8c939d;
    width: 178px;
    height: 178px;
    line-height: 178px;
    text-align: center;
  }
  .avatar {
    width: 178px;
    height: 178px;
    display: block;
  }
</style>

<script>
  export default {
    data() {
      return {
        imageUrl: ''
      };
    },
    methods: {
      handleAvatarSuccess(res, file) {
        this.imageUrl = URL.createObjectURL(file.raw);
      },
      beforeAvatarUpload(file) {
        const isJPG = file.type === 'image/jpeg';
        const isLt2M = file.size / 1024 / 1024 < 2;

        if (!isJPG) {
          this.$message.error('上传头像图片只能是 JPG 格式!');
        }
        if (!isLt2M) {
          this.$message.error('上传头像图片大小不能超过 2MB!');
        }
        return isJPG && isLt2M;
      }
    }
  }
</script>

这里是我自己的图片上传前端实战代码:

我为组件添加了name属性,相当于给他加了个别名叫做img。

<template>
    <div>
        <el-upload name="img" class="avatar-uploader"             
          action="http://127.0.0.1:8700/upload"         
          :show-file-list="false" :on-success="hanadle_success">
            <img v-if="addform.img" :src="addform.img" class="avatar" />
            <i v-else class="el-icon-plus avatar-uploader-icon"></i>
        </el-upload>
    </div>
</template>

<script>
export default {
    name: "app",
    data() {
        return {
            addform:{
                img:''
            }
        };
    },
    methods: {
        hanadle_success(res, file, fileList) {
            this.addform.img = res.path; //实现单独上传
            
            //下面这个实现多种上传,两个都写上也没事,用不到也不报错
            const result = fileList.every((item) => item.status === "success");
            if (result) {
                fileList.map((item) => {
                    item.response &&
                        this.fileList.push({
                            name: "",
                            url: item.response.path,
                        });
                    return true;
                });
            }
        },
    },
};
</script>

<style scoped>
.avatar-uploader .el-upload {
    border: 10px dashed gold;
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}
.avatar-uploader .el-upload:hover {
    border-color: #409eff;
}
.avatar-uploader-icon {
    border: 1px dashed gainsboro;
    font-size: 28px;
    color: #8c939d;
    width: 178px;
    height: 178px;
    line-height: 178px;
    text-align: center;
}
.avatar {
    width: 178px;
    height: 178px;
    display: block;
}
</style>

下面说一下后端代码:

注意记得创建一个upload文件夹用来存储前端存进来的静态资源嗷

const express = require('express')//通过npm i express命令下载模块并导入
const app = express()//创建实例
const multiparty = require('multiparty')//通过npm i multiparty命令下载模块并导入
app.use('/upload',express.static('upload'))//将upload文件作为静态资源文件
app.post('/upload',(req,res)=>{
    const form = new multiparty.Form()
    form.uploadDir = './upload'
    form.parse(req,(err,fields,fiels)=>{
        res.send({
            //拼接路径,我的端口号是8700
            //这里的img对象我前面定义name属性的别名img
            path:'http://127.0.0.1:8700/'+fiels.img[0].path 
        })
    })
})

const port = 8700
app.listen(port, () => console.log(`Server running at  http://127.0.0.1:${port}`))

本文转载自: https://blog.csdn.net/m0_59365887/article/details/139482691
版权归原作者 世伟爱吗喽 所有, 如有侵权,请联系我们删除。

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