@RequestMapping(value = "/downLoad", method = RequestMethod.GET)
public static final String downLoad(HttpServletRequest req, HttpServletResponse res){
Map<String, Object> reMap = new HashMap<>();
String fileName = "aaa.txt";
String path = "f:/svss/";
String filepath = path+fileName;
OutputStream os = null;
InputStream is = null;
try {
// 清空输出流
res.reset();
res.setCharacterEncoding("utf-8");
res.setContentType("application/octet-stream");
res.setHeader("Content-Disposition",
"attachment;filename=" + new String(fileName.getBytes("UTF-8"), "ISO8859-1"));
// 读取流
File f = new File(filepath);
is = new FileInputStream(f);
if (is == null) {
reMap.put("msg", "下载附件失败");
}
ServletOutputStream sout = res.getOutputStream();
BufferedInputStream bis = null;
BufferedOutputStream bos = null;
bis = new BufferedInputStream(is);
bos = new BufferedOutputStream(sout);
byte[] buff = new byte[2048];
int bytesRead;
while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
bos.write(buff, 0, bytesRead);
}
bos.flush();
bos.close();
bis.close();
is.close();
os.close();
} catch (Exception e) {
reMap.put("msg", "下载附件失败,error:" + e.getMessage());
}
String str = JsonUtil.map2Json(reMap);
return str;
}
vue+axios+springboot文件下载
//前台代码
<el-button size="medium" type="primary" @click="downloadFile">Test</el-button>
//js函数
downloadFile(){
this.axios({
method: "get",
url: '/api/downloadFile',
responseType: 'blob',
headers: {
Authorization: localStorage.getItem("token")
}
})
.then(response => {
//文件名 文件保存对话框中的默认显示
let fileName = 'test.txt';
let data = response.data;
if(!data){
return
}
console.log(response);
//构造a标签 通过a标签来下载
let url = window.URL.createObjectURL(new Blob([data]))
let a = document.createElement('a')
a.style.display = 'none'
a.href = url
//此处的download是a标签的内容,固定写法,不是后台api接口
a.setAttribute('download',fileName)
document.body.appendChild(a)
//点击下载
a.click()
// 下载完成移除元素
document.body.removeChild(a);
// 释放掉blob对象
window.URL.revokeObjectURL(url);
})
.catch(response => {
this.$message.error(response);
});
},
//后台代码
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转载自www.cnblogs.com/xuchao0506/p/12803316.html
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