Upload 上传

通过点击或者拖拽上传文件

点击上传

通过 slot 你可以传入自定义的上传按钮类型和文字提示。可通过设置limit和on-exceed来限制上传文件的个数和定义超出限制时的行为。可通过设置before-remove来阻止文件移除操作。

 1 <el-upload
 2   class="upload-demo"
 3   action="https://jsonplaceholder.typicode.com/posts/"
 4   :on-preview="handlePreview"
 5   :on-remove="handleRemove"
 6   :before-remove="beforeRemove"
 7   multiple
 8   :limit="3"
 9   :on-exceed="handleExceed"
10   :file-list="fileList">
11   <el-button size="small" type="primary">点击上传</el-button>
12   <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
13 </el-upload>
14 <script>
15   export default {
16     data() {
17       return {
18         fileList: [{name: 'food.jpeg', url: 'https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg?imageMogr2/thumbnail/360x360/format/webp/quality/100'}, {name: 'food2.jpeg', url: 'https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg?imageMogr2/thumbnail/360x360/format/webp/quality/100'}]
19       };
20     },
21     methods: {
22       handleRemove(file, fileList) {
23         console.log(file, fileList);
24       },
25       handlePreview(file) {
26         console.log(file);
27       },
28       handleExceed(files, fileList) {
29         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 ${files.length + fileList.length} 个文件`);
30       },
31       beforeRemove(file, fileList) {
32         return this.$confirm(`确定移除 ${ file.name }？`);
33       }
34     }
35   }
36 </script>

用户头像上传

使用 before-upload 限制用户上传的图片格式和大小。

 1 <el-upload
 2   class="avatar-uploader"
 3   action="https://jsonplaceholder.typicode.com/posts/"
 4   :show-file-list="false"
 5   :on-success="handleAvatarSuccess"
 6   :before-upload="beforeAvatarUpload">
 7   <img v-if="imageUrl" :src="imageUrl" class="avatar">
 8   <i v-else class="el-icon-plus avatar-uploader-icon"></i>
 9 </el-upload>
10 
11 <style>
12   .avatar-uploader .el-upload {
13     border: 1px dashed #d9d9d9;
14     border-radius: 6px;
15     cursor: pointer;
16     position: relative;
17     overflow: hidden;
18   }
19   .avatar-uploader .el-upload:hover {
20     border-color: #409EFF;
21   }
22   .avatar-uploader-icon {
23     font-size: 28px;
24     color: #8c939d;
25     width: 178px;
26     height: 178px;
27     line-height: 178px;
28     text-align: center;
29   }
30   .avatar {
31     width: 178px;
32     height: 178px;
33     display: block;
34   }
35 </style>
36 
37 <script>
38   export default {
39     data() {
40       return {
41         imageUrl: ''
42       };
43     },
44     methods: {
45       handleAvatarSuccess(res, file) {
46         this.imageUrl = URL.createObjectURL(file.raw);
47       },
48       beforeAvatarUpload(file) {
49         const isJPG = file.type === 'image/jpeg';
50         const isLt2M = file.size / 1024 / 1024 < 2;
51 
52         if (!isJPG) {
53           this.$message.error('上传头像图片只能是 JPG 格式!');
54         }
55         if (!isLt2M) {
56           this.$message.error('上传头像图片大小不能超过 2MB!');
57         }
58         return isJPG && isLt2M;
59       }
60     }
61   }
62 </script>

照片墙

使用 list-type 属性来设置文件列表的样式。

 1 <el-upload
 2   action="https://jsonplaceholder.typicode.com/posts/"
 3   list-type="picture-card"
 4   :on-preview="handlePictureCardPreview"
 5   :on-remove="handleRemove">
 6   <i class="el-icon-plus"></i>
 7 </el-upload>
 8 <el-dialog :visible.sync="dialogVisible">
 9   <img width="100%" :src="dialogImageUrl" alt="">
10 </el-dialog>
11 <script>
12   export default {
13     data() {
14       return {
15         dialogImageUrl: '',
16         dialogVisible: false
17       };
18     },
19     methods: {
20       handleRemove(file, fileList) {
21         console.log(file, fileList);
22       },
23       handlePictureCardPreview(file) {
24         this.dialogImageUrl = file.url;
25         this.dialogVisible = true;
26       }
27     }
28   }
29 </script>

图片列表缩略图

 1 <el-upload
 2   class="upload-demo"
 3   action="https://jsonplaceholder.typicode.com/posts/"
 4   :on-preview="handlePreview"
 5   :on-remove="handleRemove"
 6   :file-list="fileList2"
 7   list-type="picture">
 8   <el-button size="small" type="primary">点击上传</el-button>
 9   <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
10 </el-upload>
11 <script>
12   export default {
13     data() {
14       return {
15         fileList2: [{name: 'food.jpeg', url: 'https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg?imageMogr2/thumbnail/360x360/format/webp/quality/100'}, {name: 'food2.jpeg', url: 'https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg?imageMogr2/thumbnail/360x360/format/webp/quality/100'}]
16       };
17     },
18     methods: {
19       handleRemove(file, fileList) {
20         console.log(file, fileList);
21       },
22       handlePreview(file) {
23         console.log(file);
24       }
25     }
26   }
27 </script>

上传文件列表控制

通过 on-change 钩子函数来对列表进行控制

 1 <el-upload
 2   class="upload-demo"
 3   action="https://jsonplaceholder.typicode.com/posts/"
 4   :on-change="handleChange"
 5   :file-list="fileList3">
 6   <el-button size="small" type="primary">点击上传</el-button>
 7   <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
 8 </el-upload>
 9 <script>
10   export default {
11     data() {
12       return {
13         fileList3: [{
14           name: 'food.jpeg',
15           url: 'https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg?imageMogr2/thumbnail/360x360/format/webp/quality/100',
16           status: 'finished'
17         }, {
18           name: 'food2.jpeg',
19           url: 'https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg?imageMogr2/thumbnail/360x360/format/webp/quality/100',
20           status: 'finished'
21         }]
22       };
23     },
24     methods: {
25       handleChange(file, fileList) {
26         this.fileList3 = fileList.slice(-3);
27       }
28     }
29   }
30 </script>

拖拽上传

1 <el-upload
2   class="upload-demo"
3   drag
4   action="https://jsonplaceholder.typicode.com/posts/"
5   multiple>
6   <i class="el-icon-upload"></i>
7   <div class="el-upload__text">将文件拖到此处，或<em>点击上传</em></div>
8   <div class="el-upload__tip" slot="tip">只能上传jpg/png文件，且不超过500kb</div>
9 </el-upload>

手动上传

 1 <el-upload
 2   class="upload-demo"
 3   ref="upload"
 4   action="https://jsonplaceholder.typicode.com/posts/"
 5   :on-preview="handlePreview"
 6   :on-remove="handleRemove"
 7   :file-list="fileList"
 8   :auto-upload="false">
 9   <el-button slot="trigger" size="small" type="primary">选取文件</el-button>
10   <el-button style="margin-left: 10px;" size="small" type="success" @click="submitUpload">上传到服务器</el-button>
11   <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
12 </el-upload>
13 <script>
14   export default {
15     data() {
16       return {
17         fileList: [{name: 'food.jpeg', url: 'https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg?imageMogr2/thumbnail/360x360/format/webp/quality/100'}, {name: 'food2.jpeg', url: 'https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg?imageMogr2/thumbnail/360x360/format/webp/quality/100'}]
18       };
19     },
20     methods: {
21       submitUpload() {
22         this.$refs.upload.submit();
23       },
24       handleRemove(file, fileList) {
25         console.log(file, fileList);
26       },
27       handlePreview(file) {
28         console.log(file);
29       }
30     }
31   }
32 </script>

 

Attribute

参数	说明	类型	可选值	默认值
action	必选参数，上传的地址	string	—	—
headers	设置上传的请求头部	object	—	—
multiple	是否支持多选文件	boolean	—	—
data	上传时附带的额外参数	object	—	—
name	上传的文件字段名	string	—	file
with-credentials	支持发送 cookie 凭证信息	boolean	—	false
show-file-list	是否显示已上传文件列表	boolean	—	true
drag	是否启用拖拽上传	boolean	—	false
accept	接受上传的文件类型（thumbnail-mode 模式下此参数无效）	string	—	—
on-preview	点击已上传的文件链接时的钩子, 可以通过 file.response 拿到服务端返回数据	function(file)	—	—
on-remove	文件列表移除文件时的钩子	function(file, fileList)	—	—
on-success	文件上传成功时的钩子	function(response, file, fileList)	—	—
on-error	文件上传失败时的钩子	function(err, file, fileList)	—	—
on-progress	文件上传时的钩子	function(event, file, fileList)	—	—
on-change	文件状态改变时的钩子，添加文件、上传成功和上传失败时都会被调用	function(file, fileList)	—	—
before-upload	上传文件之前的钩子，参数为上传的文件，若返回 false 或者返回 Promise 且被 reject，则停止上传。	function(file)	—	—
before-remove	删除文件之前的钩子，参数为上传的文件和文件列表，若返回 false 或者返回 Promise 且被 reject，则停止上传。	function(file, fileList)	—	—
list-type	文件列表的类型	string	text/picture/picture-card	text
auto-upload	是否在选取文件后立即进行上传	boolean	—	true
file-list	上传的文件列表, 例如: [{name: 'food.jpg', url: 'https://xxx.cdn.com/xxx.jpg'}]	array	—	[]
http-request	覆盖默认的上传行为，可以自定义上传的实现	function	—	—
disabled	是否禁用	boolean	—	false
limit	最大允许上传个数	number	—	—
on-exceed	文件超出个数限制时的钩子	function(files, fileList)	—	-

¶Methods

方法名	说明	参数
clearFiles	清空已上传的文件列表（该方法不支持在 before-upload 中调用）	—
abort	取消上传请求	（ file: fileList 中的 file 对象 ）

来源：https://www.cnblogs.com/grt322/p/8553342.html