Node.js 进阶（六）：手把手教你使用和理解文件上传的 Multer 实现，通过软件包了解 O(∩_∩)O ~-前端

界面

代码

因为重点在服务端，所以这里对前端部分代码不做过多阐述，直接上代码！

<template>
  <el-upload
    class="upload-demo"
    action="/api/files/upload"
    :on-preview="handlePreview"
    :on-remove="handleRemove"
    :before-remove="beforeRemove"
    multiple
    :limit="3"
    :on-success="handleAvatarSuccess"
    :on-exceed="handleExceed"
    :file-list="fileList"
  >
    <el-button size="small" type="primary">点击上传</el-button>
    <div slot="tip" class="el-upload__tip">只能上传 jpg、png、gif 文件，且不超过 200kb </div>
  </el-upload>
</template>
<script>
export default {
  data() {
    return {
      fileList: [
        { name: 'food.jpeg', url: 'https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg?imageMogr2/thumbnail/360x360/format/webp/quality/100' }
      ]
    }
  },
  methods: {
    handleAvatarSuccess(res, file) {
      if (res.code === 10000) {
        this.$message.error(res.message)
        this.fileList.splice(this.fileList.length, 1)
      } else {
        this.$message.success('上传成功')
      }
    },
    handleRemove(file, fileList) {
      console.log(file, fileList)
    },
    handlePreview(file) {
      console.log(file)
    },
    handleExceed(files, fileList) {
      this.$message.warning(`当前限制选择 3 个文件，本次选择了 ${files.length} 个文件，共选择了 ${files.length + fileList.length} 个文件`)
    },
    beforeRemove(file, fileList) {
      return this.$confirm(`确定移除 ${file.name}？`)
    }
  }
}
</script>
<style lang="scss" scoped>
.upload-demo {
  text-align: center;
  margin-top: 100px;
}
</style>

下面我们重点来看服务端的逻辑！！