时间：2021-03-19 09:46:11 | 栏目：vue | 点击：次
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 class="hello">
<input
class="file"
name="file"
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");
}