init

plus-ui/src/components/ImageUpload/index.vue

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+<template>
+  <div class="component-upload-image">
+    <el-upload
+      ref="imageUpload"
+      multiple
+      :action="uploadImgUrl"
+      list-type="picture-card"
+      :on-success="handleUploadSuccess"
+      :before-upload="handleBeforeUpload"
+      :limit="limit"
+      :on-error="handleUploadError"
+      :on-exceed="handleExceed"
+      :before-remove="handleDelete"
+      :show-file-list="true"
+      :headers="headers"
+      :file-list="fileList"
+      :on-preview="handlePictureCardPreview"
+      :class="{ hide: fileList.length >= limit }"
+    >
+      <el-icon class="avatar-uploader-icon">
+        <plus />
+      </el-icon>
+    </el-upload>
+    <!-- 上传提示 -->
+    <div v-if="showTip" class="el-upload__tip">
+      请上传
+      <template v-if="fileSize">
+        大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b>
+      </template>
+      <template v-if="fileType">
+        格式为 <b style="color: #f56c6c">{{ fileType.join('/') }}</b>
+      </template>
+      的文件
+    </div>
+
+    <el-dialog v-model="dialogVisible" title="预览" width="800px" append-to-body>
+      <img :src="dialogImageUrl" style="display: block; max-width: 100%; margin: 0 auto" />
+    </el-dialog>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { listByIds, delOss } from '@/api/system/oss';
+import { OssVO } from '@/api/system/oss/types';
+import { propTypes } from '@/utils/propTypes';
+import { globalHeaders } from '@/utils/request';
+import { compressAccurately } from 'image-conversion';
+
+const props = defineProps({
+  modelValue: {
+    type: [String, Object, Array],
+    default: () => []
+  },
+  // 图片数量限制
+  limit: propTypes.number.def(5),
+  // 大小限制(MB)
+  fileSize: propTypes.number.def(5),
+  // 文件类型, 例如['png', 'jpg', 'jpeg']
+  fileType: propTypes.array.def(['png', 'jpg', 'jpeg']),
+  // 是否显示提示
+  isShowTip: {
+    type: Boolean,
+    default: true
+  },
+  // 是否支持压缩，默认否
+  compressSupport: {
+    type: Boolean,
+    default: false
+  },
+  // 压缩目标大小，单位KB。默认300KB以上文件才压缩，并压缩至300KB以内
+  compressTargetSize: propTypes.number.def(300)
+});
+
+const { proxy } = getCurrentInstance() as ComponentInternalInstance;
+const emit = defineEmits(['update:modelValue']);
+const number = ref(0);
+const uploadList = ref<any[]>([]);
+const dialogImageUrl = ref('');
+const dialogVisible = ref(false);
+
+const baseUrl = import.meta.env.VITE_APP_BASE_API;
+const uploadImgUrl = ref(baseUrl + '/resource/oss/upload'); // 上传的图片服务器地址
+const headers = ref(globalHeaders());
+
+const fileList = ref<any[]>([]);
+const showTip = computed(() => props.isShowTip && (props.fileType || props.fileSize));
+
+const imageUploadRef = ref<ElUploadInstance>();
+
+watch(
+  () => props.modelValue,
+  async (val: string) => {
+    if (val) {
+      // 首先将值转为数组
+      let list: OssVO[] = [];
+      if (Array.isArray(val)) {
+        list = val as OssVO[];
+      } else {
+        const res = await listByIds(val);
+        list = res.data;
+      }
+      // 然后将数组转为对象数组
+      fileList.value = list.map((item) => {
+        // 字符串回显处理 如果此处存的是url可直接回显 如果存的是id需要调用接口查出来
+        let itemData;
+        if (typeof item === 'string') {
+          itemData = { name: item, url: item };
+        } else {
+          // 此处name使用ossId 防止删除出现重名
+          itemData = { name: item.ossId, url: item.url, ossId: item.ossId };
+        }
+        return itemData;
+      });
+    } else {
+      fileList.value = [];
+      return [];
+    }
+  },
+  { deep: true, immediate: true }
+);
+
+/** 上传前loading加载 */
+const handleBeforeUpload = (file: any) => {
+  let isImg = false;
+  if (props.fileType.length) {
+    let fileExtension = '';
+    if (file.name.lastIndexOf('.') > -1) {
+      fileExtension = file.name.slice(file.name.lastIndexOf('.') + 1);
+    }
+    isImg = props.fileType.some((type: any) => {
+      if (file.type.indexOf(type) > -1) return true;
+      if (fileExtension && fileExtension.indexOf(type) > -1) return true;
+      return false;
+    });
+  } else {
+    isImg = file.type.indexOf('image') > -1;
+  }
+  if (!isImg) {
+    proxy?.$modal.msgError(`文件格式不正确, 请上传${props.fileType.join('/')}图片格式文件!`);
+    return false;
+  }
+  if (file.name.includes(',')) {
+    proxy?.$modal.msgError('文件名不正确，不能包含英文逗号!');
+    return false;
+  }
+  if (props.fileSize) {
+    const isLt = file.size / 1024 / 1024 < props.fileSize;
+    if (!isLt) {
+      proxy?.$modal.msgError(`上传头像图片大小不能超过 ${props.fileSize} MB!`);
+      return false;
+    }
+  }
+
+  //压缩图片，开启压缩并且大于指定的压缩大小时才压缩
+  if (props.compressSupport && file.size / 1024 > props.compressTargetSize) {
+    proxy?.$modal.loading('正在上传图片，请稍候...');
+    number.value++;
+    return compressAccurately(file, props.compressTargetSize);
+  } else {
+    proxy?.$modal.loading('正在上传图片，请稍候...');
+    number.value++;
+  }
+};
+
+// 文件个数超出
+const handleExceed = () => {
+  proxy?.$modal.msgError(`上传文件数量不能超过 ${props.limit} 个!`);
+};
+
+// 上传成功回调
+const handleUploadSuccess = (res: any, file: UploadFile) => {
+  if (res.code === 200) {
+    uploadList.value.push({ name: res.data.fileName, url: res.data.url, ossId: res.data.ossId });
+    uploadedSuccessfully();
+  } else {
+    number.value--;
+    proxy?.$modal.closeLoading();
+    proxy?.$modal.msgError(res.msg);
+    imageUploadRef.value?.handleRemove(file);
+    uploadedSuccessfully();
+  }
+};
+
+// 删除图片
+const handleDelete = (file: UploadFile): boolean => {
+  const findex = fileList.value.map((f) => f.name).indexOf(file.name);
+  if (findex > -1 && uploadList.value.length === number.value) {
+    let ossId = fileList.value[findex].ossId;
+    delOss(ossId);
+    fileList.value.splice(findex, 1);
+    emit('update:modelValue', listToString(fileList.value));
+    return false;
+  }
+  return true;
+};
+
+// 上传结束处理
+const uploadedSuccessfully = () => {
+  if (number.value > 0 && uploadList.value.length === number.value) {
+    fileList.value = fileList.value.filter((f) => f.url !== undefined).concat(uploadList.value);
+    uploadList.value = [];
+    number.value = 0;
+    emit('update:modelValue', listToString(fileList.value));
+    proxy?.$modal.closeLoading();
+  }
+};
+
+// 上传失败
+const handleUploadError = () => {
+  proxy?.$modal.msgError('上传图片失败');
+  proxy?.$modal.closeLoading();
+};
+
+// 预览
+const handlePictureCardPreview = (file: any) => {
+  dialogImageUrl.value = file.url;
+  dialogVisible.value = true;
+};
+
+// 对象转成指定字符串分隔
+const listToString = (list: any[], separator?: string) => {
+  let strs = '';
+  separator = separator || ',';
+  for (let i in list) {
+    if (undefined !== list[i].ossId && list[i].url.indexOf('blob:') !== 0) {
+      strs += list[i].ossId + separator;
+    }
+  }
+  return strs != '' ? strs.substring(0, strs.length - 1) : '';
+};
+</script>
+
+<style scoped lang="scss">
+// .el-upload--picture-card 控制加号部分
+:deep(.hide .el-upload--picture-card) {
+  display: none;
+}
+</style>