有這樣一個檔案下載串連如下:
<a href="檔案名稱.xls" >download</a>
在tomcat下,點download的時候,可以彈出檔案下載框,但是在weblogic下卻直接把該檔案開啟了。
原因是:weblogic是根據HTTP Header 的檔案類型來判斷是否彈出下載框的,預設的檔案類型是contentType="text/html",所以是自動開啟的。而tomcat是預設把檔案都作為二進位檔案,所以彈出對話方塊。
那如何讓weblogic能彈出對話方塊呢,樣本如下:
test1.jsp 內容如下:
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<script type="text/javascript">
function returnTo(url){
window.location= 'test2.jsp?filename='+encodeURI(url);
}
</script>
//注意:encodeURI 函數可以很好的解決utf-8編碼下常見的 奇數個漢語最後一個為亂碼的問題。
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<a href="javascript:returnTo('檔案名稱.xls')" >download</a>
</body>
</html>
一:採用RequestDispatcher的方式進行
test2.jsp 內容如下:
<%@ page language="java" pageEncoding="utf-8"%>
<%
String filename = request.getParameter("filename");
response.setContentType("application/x-download");//設定為下載application/x-download
filename = new String(filename.getBytes("ISO-8859-1"), "utf-8"); //解決get請求傳遞參數為亂碼的問題。
String display = java.net.URLEncoder.encode(filename,"utf-8"); //解決檔案下載框漢語檔案名稱為亂碼的問題。
response.addHeader("Content-Disposition","attachment;filename=" + display);
try
{
RequestDispatcher dis = application.getRequestDispatcher("/"+filename);
if(dis!= null)
{
dis.forward(request,response);
}
response.flushBuffer();
}
catch(Exception e)
{
e.printStackTrace();
}
finally
{
}
%>
二:採用檔案流輸出的方式下載
test2.jsp 內容如下:
<%@ page language="java" pageEncoding="utf-8"%>
<%
out.clear();
response.reset();
response.setContentType("application/x-download");
String filename = request.getParameter("filename");
response.setContentType("application/x-download");
filename = new String(filename.getBytes("ISO-8859-1"), "utf-8");
String display = java.net.URLEncoder.encode(filename, "utf-8");
response.addHeader("Content-Disposition", "attachment;filename="
+ display); //
String path = application.getRealPath(filename);//取得實體路徑
java.io.OutputStream outp = null;
java.io.FileInputStream in = null;
try {
outp = response.getOutputStream();
in = new java.io.FileInputStream(path);
byte[] b = new byte[1024];
int i = 0;
while ((i = in.read(b)) > 0) {
outp.write(b, 0, i);
}
} catch (Exception e) {
System.out.println("Error!");
e.printStackTrace();
} finally {
if (in != null) {
in.close();
in = null;
}
}
%>