JAVA --下载文件 点击链接直接下载 而不是打开文件

1- html、jsp 设置a标签属性。我这里就不说了.....（<a href="imges/1.jpg" download="图片"><img src="imges/1.jpgf" alt="图片"></a>）

2- PHP

<? 
$file_name = "xxx.rar";     //下载文件名  
$file_dir = "./up/";        //下载文件存放目录  
//检查文件是否存在  
if (! file_exists ( $file_dir . $file_name )) {  echo "文件找不到";  exit ();  
} else {  //打开文件  $file = fopen ( $file_dir . $file_name, "r" );  //输入文件标签   Header ( "Content-type: application/octet-stream" );  Header ( "Accept-Ranges: bytes" );  Header ( "Accept-Length: " . filesize ( $file_dir . $file_name ) );  Header ( "Content-Disposition: attachment; filename=" . $file_name );  //输出文件内容   //读取文件内容并直接输出到浏览器  echo fread ( $file, filesize ( $file_dir . $file_name ) );  fclose ( $file );  exit ();  
}  
?> 

。。。。。。。。。。。。。。。。。

算了，其他的就不说了。。

JAVA --- 生成的链接直接下载

    @RequestMapping(value = "download/pdf", method = RequestMethod.GET)public void creditFailurePdf(HttpServletRequest request, HttpServletResponse response) {String code = CommUtil.toString(request.getParameter("code"));creditFailurePdfService.getPdf(code, response);}

 CommUtil.toString 是转String 的方法

  getPdf()方法如下：这里in为输入流

InputStream in = getFileStream(pdfUrl);

public InputStream getFileStream(String filePath){String DEFAULT_ENCODING = "UTF-8";BufferedReader reader = null;StringBuilder sb = new StringBuilder();URL url;InputStream in = null;try {url = new URL(CommUtil.toString(filePath));URLConnection conn;try {conn = url.openConnection();conn.setDoOutput(true);conn.setConnectTimeout(120000);conn.connect();in = conn.getInputStream();} catch (IOException e1) {// TODO Auto-generated catch blocke1.printStackTrace();}} catch (MalformedURLException e) {// TODO Auto-generated catch blocke.printStackTrace();}return in;}

public void getPdf(String code, HttpServletResponse response){BufferedOutputStream bost = null;BufferedInputStream inbuf = null;ServletOutputStream out = null;try {out = response.getOutputStream();bost = new BufferedOutputStream(out);// 设置response参数，打开下载页面response.reset();response.setContentType("APPLICATION/octet-stream");response.setContentType("text/html;CHARSET=UTF-8");response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode((CommUtil.getUUID() + ".pdf"), "UTF-8"));// 生成下载文件// 每次读取1024字节的数据并写入到文件中ByteArrayOutputStream baos = new ByteArrayOutputStream();byte[] buffer = new byte[1024];int len;try {while ((len = in.read(buffer)) > -1) {baos.write(buffer, 0, len);}baos.flush();} catch (IOException e) {e.printStackTrace();}in = new ByteArrayInputStream(baos.toByteArray());inbuf = new BufferedInputStream(in);byte[] by = new byte[1024];while (true) {len = inbuf.read(by);if (len == -1) {break;}bost.write(by);bost.flush();}out.flush();} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} finally {// 关闭IOtry {if (out != null) {out.close();}if (bost != null) {bost.close();}if (inbuf != null) {inbuf.close();}if (in != null) {in.close();}} catch (IOException e) {e.printStackTrace();}}
}