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 这篇文章主要为大家详细介绍了springboot+vue实现文件上传下载,文中示例代码介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们可以参考一下 本文实例为大家分享了springboot+vue实现文件上传下载的具体代码,供大家参考,具体内容如下 一、文件上传(基于axios的简单上传) 所使用的技术:axios、springboot、vue; 实现思路:通过h5 :input元素标签进行选择文件,获取所选选择的文件路径,new fromdata对象,设置fromdata的参数,设置axios对应的请求头,最后通过axios发送post请求后端服务。后端服务同过MultipartFile进行文件接收。具体代码如下: 前端代码: 1、创建vue对象 import Vue from 'vue'import App from './App.vue'
 import router from './router'
 import store from './store'
 import http from 'axios'
 Vue.config.productionTip = false;
 Vue.prototype.$http=http;
 window.vm=new Vue({
 router,
 store,
 render: h => h(App)
 }).$mount('#app')
 2、实现上传组件 在input标签中添加改变事件监听,当发生改变时调用up方法。 <template><div>
 <input
 
 
 type="file"
 accept="image/png, image/gif, image/jpeg"
 @change="up"
 />
 </div>
 </template>
 <script> export default {name: "HelloWorld",
 props: {
 msg: String
 },
 methods: {
 up(e) {
 let file = e.target.files[0];
 alert(file.name);
 console.log(file);
 let param = new FormData(); //创建form对象
 param.append("file", file); //通过append向form对象添加数据
 console.log(param.get("file")); //FormData私有类对象,访问不到,可以通过get判断值是否传进去
 let config = {
 headers: { "Content-Type": "multipart/form-data" }
 }; //添加请求头
 this.$http
 .post("http://127.0.0.1:8081/data/up", param, config)
 .then(response => {
 console.log(response.data);
 }).catch(
 error=>{
 alert("失败");
 }
 );
 }
 }
 };
 </script>
 <!-- Add "scoped" attribute to limit CSS to this component only --><style scoped lang="less">
 </style> 后端代码: 上传文件代码 @RequestMapping(value = "/up", method = RequestMethod.POST)@ResponseBody
 public Result<String> uploade(@RequestParam("file") MultipartFile file) {
 try {
 log.error("开始上传!!!");
 String originalFilename = file.getOriginalFilename();
 InputStream inputStream = file.getInputStream();
 String path="d:/2020test/";
 File file1 = new File(path + originalFilename);
 if(!file1.getParentFile().exists()){
 file1.getParentFile().mkdirs();
 }
 file.transferTo(file1);
 log.info("上传成功!");
 } catch (IOException e) {
 e.printStackTrace();
 }
 Result<String> stringResult = new Result<String>();
 stringResult.setMsg("sue");
 stringResult.setData("file");
 return stringResult;
 }
 二、文件下载 通过response输出流返回文件内容,核心代码设置下载文件的名字(res.setHeader(“Content-Disposition”, “attachment;filename=” + java.net.URLEncoder.encode(realFileName.trim(), “UTF-8”));) @RequestMapping(value = "/get", method = RequestMethod.GET)public void downloadFile(HttpServletResponse res) {
 String realFileName="C:/Users/xiongyi/Desktop/12.xls";
 File excelFile = new File(realFileName);
 res.setCharacterEncoding("UTF-8");
 res.setHeader("content-type", "application/octet-stream;charset=UTF-8");
 res.setContentType("application/octet-stream;charset=UTF-8");
 //加上设置大小下载下来的.xlsx文件打开时才不会报“Excel 已完成文件级验证和修复。此工作簿的某些部分可能已被修复或丢弃”
 //  res.addHeader("Content-Length", String.valueOf(excelFile.length()));
 try {
 res.setHeader("Content-Disposition", "attachment;filename=" + java.net.URLEncoder.encode(realFileName.trim(), "UTF-8"));
 } catch (UnsupportedEncodingException e1) {
 e1.printStackTrace();
 }
 byte[] buff = new byte[1024];
 BufferedInputStream bis = null;
 OutputStream os = null;
 try {
 os = res.getOutputStream();
 bis = new BufferedInputStream(new FileInputStream(new File(realFileName)));
 int i = bis.read(buff);
 while (i != -1) {
 os.write(buff, 0, buff.length);
 os.flush();
 i = bis.read(buff);
 }
 } catch (IOException e) {
 e.printStackTrace();
 } finally {
 if (bis != null) {
 try {
 bis.close();
 } catch (IOException e) {
 }
 }
 }
 Result<String> stringResult = new Result<String>();
 stringResult.setMsg("sue");
 stringResult.setData("nimabi");
 }
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