這篇文章主要為大家詳細(xì)介紹了springboot+vue實現(xiàn)文件上傳下載,文中示例代碼介紹的非常詳細(xì),具有一定的參考價值,感興趣的小伙伴們可以參考一下
本文實例為大家分享了springboot+vue實現(xiàn)文件上傳下載的具體代碼,供大家參考,具體內(nèi)容如下
一、文件上傳(基于axios的簡單上傳)
所使用的技術(shù):axios、springboot、vue;
實現(xiàn)思路:通過h5 :input元素標(biāo)簽進(jìn)行選擇文件,獲取所選選擇的文件路徑,new fromdata對象,設(shè)置fromdata的參數(shù),設(shè)置axios對應(yīng)的請求頭,最后通過axios發(fā)送post請求后端服務(wù)。后端服務(wù)同過MultipartFile進(jìn)行文件接收。具體代碼如下:
前端代碼:
1、創(chuàng)建vue對象
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、實現(xiàn)上傳組件
在input標(biāo)簽中添加改變事件監(jiān)聽,當(dāng)發(fā)生改變時調(diào)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(); //創(chuàng)建form對象
param.append("file", file); //通過append向form對象添加數(shù)據(jù)
console.log(param.get("file")); //FormData私有類對象,訪問不到,可以通過get判斷值是否傳進(jìn)去
let config = {
headers: { "Content-Type": "multipart/form-data" }
}; //添加請求頭
this.$http
.post("http://127.0.0.1:8081/data/up", param, config)
.then(response => {
console.log(response.data);
}).catch(
error=>{
alert("失敗");
}
);
}
}
};
</script>
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped lang="less">
</style>
后端代碼:
上傳文件代碼
@RequestMapping(value = "/up", method = RequestMethod.POST)
@ResponseBody
public Result<String> uploade(@RequestParam("file") MultipartFile file) {
try {
log.error("開始上傳?。?!");
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("上傳成功!");
} catch (IOException e) {
e.printStackTrace();
}
Result<String> stringResult = new Result<String>();
stringResult.setMsg("sue");
stringResult.setData("file");
return stringResult;
}
二、文件下載
通過response輸出流返回文件內(nèi)容,核心代碼設(shè)置下載文件的名字(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");
//加上設(shè)置大小下載下來的.xlsx文件打開時才不會報“Excel 已完成文件級驗證和修復(fù)。此工作簿的某些部分可能已被修復(fù)或丟棄”
// 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");
}
以上就是本文的全部內(nèi)容,希望對大家的學(xué)習(xí)有所幫助,也希望大家多多支持腳本之家。
來源:腳本之家
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