java文件与下载文件_java文件下载和在线打开

/**

* &＃64;author chenzheng

* &＃64;since 2013-9-10

* &＃64;Description: java下载

* &＃64;throws

* &＃64;param filePath

* &＃64;param response

* &＃64;param isOnLine

* &＃64;throws Exception

* void

*/

public void downLoad() throws Exception {

String paths&＃61;ServletActionContext.getServletContext().getRealPath("/");

System.out.println(paths);

String filePath&＃61;"F:\\哈哈.txt";

boolean isOnLine&＃61;false;

HttpServletResponse response &＃61; ServletActionContext.getResponse();

response.setCharacterEncoding("utf-8");

File f &＃61; new File(filePath);

if (!f.exists()) {

response.sendError(404, "File not found!");

return;

}

BufferedInputStream br &＃61; new BufferedInputStream(new FileInputStream(f));

byte[] buf &＃61; new byte[1024];

int len &＃61; 0;

response.reset(); // 非常重要

String filename&＃61;new String(f.getName().getBytes("gbk"),"iso-8859-1");

if (isOnLine) { // 在线打开方式

URL u &＃61; new URL("file:///" &＃43; filePath);

response.setContentType(u.openConnection().getContentType());

response.setHeader("Content-Disposition", "inline; filename&＃61;" &＃43; f.getName());

// 文件名应该编码成UTF-8

} else { // 纯下载方式

response.setContentType("application/x-msdownload");

response.setHeader("Content-Disposition", "attachment; filename&＃61;" &＃43;filename );

}

OutputStream out &＃61; response.getOutputStream();

while ((len &＃61; br.read(buf)) > 0)

out.write(buf, 0, len);

br.close();

out.close();

}