java 远程下载服务器的文件

废话不多说，直接上代码：

public void downloadChineseFileByOutputStream(HttpServletRequest req,

HttpServletResponse response,@RequestParam("path") String path)

throws FileNotFoundException, IOException {

String realPath = path;//req.getSession().getServletContext().getRealPath(path);//获取要下载的文件的绝对路径

String fileName = realPath.substring(realPath.lastIndexOf("\")+1);//获取要下载的文件名

String agent = req.getHeader("USER-AGENT").toLowerCase();

//根据浏览器类型处理文件名称 处理火狐浏览器下载文件名乱码

if(agent != null && agent.toLowerCase().indexOf("firefox") > 0)

{

fileName = new String(fileName.getBytes("UTF-8"),"ISO-8859-1");

}

else//其他浏览的中文名称编码

{

fileName = java.net.URLEncoder.encode(fileName, "UTF-8");

}

//设置content-disposition响应头控制浏览器以下载的形式打开文件，中文文件名要使用URLEncoder.encode方法进行编码，否则会出现文件名乱码

response.reset();

response.setHeader("content-disposition", "attachment;filename="+fileName);

response.setContentType("application/octet-stream");

URL url = new URL(realPath);

HttpURLConnection uc = (HttpURLConnection) url.openConnection();

uc.setDoInput(true);//设置是否要从 URL 连接读取数据,默认为true

uc.connect();

InputStream in = uc.getInputStream();

/* File file = new File(realPath);

InputStream in = new FileInputStream(file);*/

int len = 0;

byte[] buffer = new byte[1024];

OutputStream out = response.getOutputStream();

while ((len = in.read(buffer)) > 0) {

out.write(buffer,0,len);//将缓冲区的数据输出到客户端浏览器

out.flush();

}

out.close();

in.close();

}

废话不多说，直接上代码： public void downloadChineseFileByOutputStream(HttpServletRequest req, HttpServletResponse response,@RequestParam("path") String path) throws FileNotFoundException, IOException { String realPath = path;//req.getSession().getServletContext().getRealPath(path);//获取要下载的文件的绝对路径 String fileName = realPath.substring(realPath.lastIndexOf("\")+1);//获取要下载的文件名 String agent = req.getHeader("USER-AGENT").toLowerCase(); //根据浏览器类型处理文件名称 处理火狐浏览器下载文件名乱码 if(agent != null && agent.toLowerCase().indexOf("firefox") > 0) { fileName = new String(fileName.getBytes("UTF-8"),"ISO-8859-1"); } else//其他浏览的中文名称编码 { fileName = java.net.URLEncoder.encode(fileName, "UTF-8"); } //设置content-disposition响应头控制浏览器以下载的形式打开文件，中文文件名要使用URLEncoder.encode方法进行编码，否则会出现文件名乱码 response.reset(); response.setHeader("content-disposition", "attachment;filename="+fileName); response.setContentType("application/octet-stream"); URL url = new URL(realPath); HttpURLConnection uc = (HttpURLConnection) url.openConnection(); uc.setDoInput(true);//设置是否要从 URL 连接读取数据,默认为true uc.connect(); InputStream in = uc.getInputStream(); /* File file = new File(realPath); InputStream in = new FileInputStream(file);*/ int len = 0; byte[] buffer = new byte[1024]; OutputStream out = response.getOutputStream(); while ((len = in.read(buffer)) > 0) { out.write(buffer,0,len);//将缓冲区的数据输出到客户端浏览器 out.flush(); } out.close(); in.close(); }