JSP文件下载

本例介绍通过超链接下载文件到本例的简单实例。值得注意的是服务器文件目录的动态改变以及对相关字符串的处理。话不多说，直接上例子：

<%@ page import="java.io.*" %>

<%
    String path = application.getRealPath("/");
    String name = null;
    String i = request.getParameter("id");
    if(i.equals("1")){

    response.setHeader("content-disposition","attachment;filename=Roman0.mov");
    name = "Roman0.mov";    

    }
    if(i.equals("2")){

    response.setHeader("content-disposition","attachment;filename=Roman1.mov"); 
    name = "Roman1.mov";
    }
    if(i.equals("3")){

    response.setHeader("content-disposition","attachment;filename=Roman2.mov"); 
    name = "Roman2.mov";
    }
    response.setHeader("contentType","application/download");

    out.clear();

    out=pageContext.pushBody();

    OutputStream  ot = response.getOutputStream();

    File f= new File(path+"\\download\\"+name);//文件位置动态修改

    System.out.print(path+"\\download\\"+name);

    FileInputStream  fin = new FileInputStream(f);

    int x=fin.read();

    while(x!=-1){
        ot.write(x);            
        x=fin.read();



    }

    ot.close();

    fin.close();

%>

文件下载完之后记得关闭连接，而且顺序尽量不作改动。