书接上回，测试demo用到的前端vue后端springboot做得文件上传预览功能，此处为前端代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css">
</head>
<body>
<div id="app">
<el-upload
action="/upload"
:on-preview="handlePreview"
accept=".pdf"
:limit="10">
<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文件，且不超过500kb</div>
</el-upload>
</div>
<script src="https://unpkg.com/vue/dist/vue.js"></script>
<script src="https://unpkg.com/element-ui/lib/index.js"></script>
<script>
new Vue({
el: '#app',
methods:{
handlePreview(file){
debugger
window.open(file.response.url);
}
}
})
</script>
</body>
</html>
