Java怎么解析出httpservletrepose中的文件流
时间: 2024-02-28 17:57:09 浏览: 15
要解析出`HttpServletResponse`中的文件流,可以按照以下步骤进行:
1. 获取`HttpServletResponse`对象中的输出流,代码如下:
```
OutputStream out = response.getOutputStream();
```
2. 将要下载的文件写入输出流中,代码如下:
```
FileInputStream in = new FileInputStream(file);
byte[] buffer = new byte[4096];
int length;
while ((length = in.read(buffer)) > 0) {
out.write(buffer, 0, length);
}
in.close();
```
其中,`file`表示要下载的文件对象。
3. 设置响应头部信息,代码如下:
```
response.setContentType("application/octet-stream");
response.setHeader("Content-Disposition", "attachment; filename=\"" + file.getName() + "\"");
```
其中,`Content-Type`设置为`application/octet-stream`,表示要下载的是二进制流;`Content-Disposition`设置为`attachment`,表示要下载文件,文件名为`file.getName()`。
完整代码示例:
```
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
File file = new File("path/to/file");
response.setContentType("application/octet-stream");
response.setHeader("Content-Disposition", "attachment; filename=\"" + file.getName() + "\"");
OutputStream out = response.getOutputStream();
FileInputStream in = new FileInputStream(file);
byte[] buffer = new byte[4096];
int length;
while ((length = in.read(buffer)) > 0) {
out.write(buffer, 0, length);
}
in.close();
out.flush();
}
```
这样就可以将`HttpServletResponse`中的文件流解析出来,并将文件以二进制流的形式下载到客户端。