2023年11月28日发(作者：)jsp下载全攻略
1、下载链接页面
页面源码如下：
点击下载
>
2、下载处理页面do_
源码如下：
<%@ page contentType="text/html;charset=gb2312"
import=".*" %><%
// 新建一个SmartUpload对象
SmartUpload su = new SmartUpload();
// 初始化
lize(pageContext);
// 设定contentDisposition为null以禁止浏览器自动打开文件，
//保证点击链接后是下载文件。若不设定，则下载的文件扩展名为
//doc时，浏览器将自动用word打开它。扩展名为pdf时，
//浏览器将用acrobat打开。
tentDisposition(null);
// 下载文件
adFile("/upload/如何赚取我的第一桶金.doc");
%>
3、如何下载中文文件
public void downloadFile(String s, String s1, String s2, int i)
throws ServletException, IOException, SmartUploadException
{
if(s == null)
throw new IllegalArgumentException("File '" + s +"' not found (1040).");
if((""))
throw new IllegalArgumentException("File '" + s +
"' not found (1040).");
if(!isVirtual(s) && m_denyPhysicalPath)
throw new SecurityException("Physical path is
denied (1035).");
if(isVirtual(s))
s = m_lPath(s);
file = new (s);
FileInputStream fileinputstream = new FileInputStream(file);
long l = ();
boolean flag = false;
int k = 0;
byte abyte0[] = new byte[i];
if(s1 == null)
m_tentType("application/x-msdownload");
else
if(() == 0)
m_tentType("application/x-msdownload");
else
m_tentType(s1);
m_tentLength((int)l);
m_contentDisposition = m_contentDisposition != null ?
m_contentDisposition : "attachment;";
if(s2 == null)
m_der("Content-Disposition",
m_contentDisposition + " filename=" +
toUtf8String(getFileName(s)));
else
if(() == 0)
m_der("Content-Disposition",
m_contentDisposition);
else
m_der("Content-Disposition",
m_contentDisposition + " filename=" + toUtf8String(s2));
while((long)k < l)
{
int j = (abyte0, 0, i);
k += j;
m_putStream().write(abyte0, 0, j);
}
();
}
public static String toUtf8String(String s) {
StringBuffer sb = new StringBuffer();
for (int i=0;i<();i++) {
char c = (i);
if (c >= 0 && c <= 255) {
(c);
} else {
byte[] b;
try {
b = ng(c).getBytes("utf-8");
} catch (Exception ex) {
n(ex);
b = new byte[0];
}
for
(int j = 0; j < ; j++) {
int k = b[j];
if (k < 0) k += 256;
("%" + tring(k).
toUpperCase());
}
}
}
return ng();
}
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