web/src/components/JImageUpload/index.vue

<template>
  <div class="img">
    <a-upload
      name="file"
      list-type="picture-card"
      :multiple="isMultiple"
      :action="uploadAction"
      :headers="headers"
      :data="{}"
      :file-list="fileList"
      :before-upload="beforeUpload"
      :disabled="disabled"
      :is-multiple="isMultiple"

      :class="[!isMultiple?'imgupload':'', (!isMultiple && picUrl)?'image-upload-single-over':'' ]"
      @change="handleChange"
      @preview="handlePreview"
    >
      <div>
        <!--<img v-if="!isMultiple && picUrl" :src="getAvatarView()" style="width:100%;height:100%"/>-->
        <div class="iconp">
          <a-icon :type="uploadLoading ? 'loading' : 'plus'" />
          <div class="ant-upload-text">{{ text }}</div>
        </div>
      </div>
      <a-modal :visible="previewVisible" :footer="null" @cancel="handleCancel()">
        <img alt="example" style="width: 100%" :src="previewImage">
      </a-modal>
    </a-upload>
  </div>
</template>

<script>
import Vue from 'vue'
import { getToken } from '@/utils/auth'

import { getFileAccessHttpUrl } from '@/utils/util'

const uidGenerator = () => {
  return '-' + parseInt(Math.random() * 10000 + 1, 10)
}
const getFileName = (path) => {
  if (path.lastIndexOf('\\') >= 0) {
    const reg = new RegExp('\\\\', 'g')
    path = path.replace(reg, '/')
  }
  return path.substring(path.lastIndexOf('/') + 1)
}
export default {
  name: 'JImageUpload',
  model: {
    prop: 'value',
    event: 'change'
  },
  props: {
    text: {
      type: String,
      required: false,
      default: '上传'
    },
    /* 这个属性用于控制文件上传的业务路径*/
    bizPath: {
      type: String,
      required: false,
      default: 'temp'
    },
    value: {
      type: [String, Array],
      required: false
    },
    disabled: {
      type: Boolean,
      required: false,
      default: false
    },
    isMultiple: {
      type: Boolean,
      required: false,
      default: false
    },
    // update-begin-author:wangshuai date:20201021 for:LOWCOD-969 新增number属性，用于判断上传数量
    number: {
      type: Number,
      required: false,
      default: 0
    }
    // update-end-author:wangshuai date:20201021 for:LOWCOD-969 新增number属性，用于判断上传数量
  },
  data() {
    return {
      uploadAction: process.env.VUE_APP_BASE_API + '/common/upload',
      uploadLoading: false,
      picUrl: false,
      headers: {},
      fileList: [],
      previewImage: '',
      previewVisible: false
    }
  },
  watch: {
    value: {
      handler(val, oldValue) {
        if (val instanceof Array) {
          this.initFileList(val.join(','))
        } else {
          this.initFileList(val)
        }
        if (!val || val.length == 0) {
          this.picUrl = false
        }
      },
      // 立刻执行handler
      immediate: true
    }
  },
  created() {
    this.headers['Authorization'] = getToken()
  },
  methods: {
    initFileList(paths) {
      if (!paths || paths.length == 0) {
        this.fileList = []
        return
      }
      this.picUrl = true
      const fileList = []
      const arr = paths.split(',')
      for (var a = 0; a < arr.length; a++) {
        const url = getFileAccessHttpUrl(arr[a])
        fileList.push({
          uid: uidGenerator(),
          name: getFileName(arr[a]),
          status: 'done',
          url: url,
          response: {
            status: 'history',
            message: arr[a]
          }
        })
      }
      this.fileList = fileList
    },
    beforeUpload: function(file) {
      var fileType = file.type
      if (fileType.indexOf('image') < 0) {
        this.$message.warning('请上传图片')
        return false
      }
    },
    handleChange(info) {
      this.picUrl = false
      let fileList = info.fileList
      // update-begin-author:wangshuai date:20201022 for:LOWCOD-969 判断number是否大于0和是否多选，返回选定的元素。
      if (this.number > 0 && this.isMultiple) {
        fileList = fileList.slice(-this.number)
      }
      // update-end-author:wangshuai date:20201022 for:LOWCOD-969 判断number是否大于0和是否多选，返回选定的元素。
      if (info.file.status === 'done') {
        if (info.file.response.code === 200) {
          this.picUrl = true
          fileList = fileList.map((file) => {
            if (file.response) {
              file.url = file.response.url
            }
            return file
          })
        }
        // this.$message.success(`${info.file.name} 上传成功!`);
      } else if (info.file.status === 'error') {
        this.$message.error(`${info.file.name} 上传失败.`)
      } else if (info.file.status === 'removed') {
        this.handleDelete(info.file)
      }
      this.fileList = fileList
      if (info.file.status === 'done' || info.file.status === 'removed') {
        this.handlePathChange()
      }
    },
    // 预览
    handlePreview(file) {
      this.previewImage = file.url || file.thumbUrl
      this.previewVisible = true
    },
    getAvatarView() {
      if (this.fileList.length > 0) {
        const url = this.fileList[0].url
        return getFileAccessHttpUrl(url)
      }
    },
    handlePathChange() {
      const uploadFiles = this.fileList
      let path = ''
      if (!uploadFiles || uploadFiles.length == 0) {
        path = ''
      }
      const arr = []
      if (!this.isMultiple && uploadFiles.length > 0) {
        arr.push(uploadFiles[uploadFiles.length - 1].response.url)
      } else {
        for (let a = 0; a < uploadFiles.length; a++) {
          // update-begin-author:taoyan date:20200819 for:【开源问题z】上传图片组件 LOWCOD-783
          if (uploadFiles[a].status === 'done') {
            arr.push(uploadFiles[a].response.url)
          } else {
            return
          }
          // update-end-author:taoyan date:20200819 for:【开源问题z】上传图片组件 LOWCOD-783
        }
      }
      if (arr.length > 0) {
        path = arr.join(',')
      }
      this.$emit('change', path)
    },
    handleDelete(file) {
      // 如有需要新增 删除逻辑
      console.log(file)
    },
    handleCancel() {
      this.close()
      this.previewVisible = false
    },
    close() {

    }
  }
}
</script>

<style scoped>
  /* update--begin--autor:lvdandan-----date:20201016------for：j-image-upload图片组件单张图片详情回显空白
  * https://github.com/zhangdaiscott/jeecg-boot/issues/1810
  * https://github.com/zhangdaiscott/jeecg-boot/issues/1779
  */

  /deep/ .imgupload .iconp{padding:20px;}
  /* update--end--autor:lvdandan-----date:20201016------for：j-image-upload图片组件单张图片详情回显空白*/

  /deep/ .image-upload-single-over .ant-upload-select{display: none}
</style>