jsp实现从服务器下载xls文件到客户端的方法
本文实例讲述了jsp实现从服务器下载xls文件到客户端的方法。分享给大家供大家参考，具体如下：
参考网上的代码写了一个下载xls文件到客户端的jsp页面，只要将服务器的文件地址传给这个jsp页面就可以实现下载文件到客户端了。
<%@pagelanguage="java"import="java.util.*"pageEncoding="utf-8"%>
<%@taglibprefix="c"uri="http://java.sun.com/jsp/jstl/core"%>
<%@pageimport="java.io.*"%>
<!DOCTYPEhtmlPUBLIC"-//W3C//DTDXHTML1.0Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<htmlxmlns="http://www.w3.org/1999/xhtml">
<head>
<metahttp-equiv="Content-Type"content="text/html;charset=utf-8"/>
<linkhref="styles/basic.css"rel="stylesheet"type="text/css"/>
<title>download</title>
</head>
<%
response.setCharacterEncoding("gb2312");
request.setCharacterEncoding("gb2312");
if(request.getParameter("file")!=null){
OutputStreamos=null;
FileInputStreamfis=null;
try{
Stringfile=request.getParameter("file");
if(!(newFile(file)).exists()){
System.out.println("没有文件");
return;
}
System.out.println("文件名为："+file);
os=response.getOutputStream();
response.setHeader("content-disposition","attachment;filename="+file);
response.setContentType("application/vnd.ms-excel");//此项内容随文件类型而异
bytetemp[]=newbyte[1000];
fis=newFileInputStream(file);
intn=0;
while((n=fis.read(temp))!=-1){
os.write(temp,0,n);
}
}catch(Exceptione){
out.print("出错");
}finally{
if(os!=null)
os.close();
if(fis!=null)
fis.close();
}
out.clear();
out=pageContext.pushBody();
}
%>
<formaction=""method="post">
<selectname="file">
<optionvalue="D:\ProgramFiles\apache-tomcat-6.0.18\webapps\StarAttendance\upload/temp.xls">
冷山sky_snow
</option>
</select>
<inputtype="submit"/>
</form>
</html>
<%@pagelanguage="java"import="java.util.*"pageEncoding="utf-8"%>
<%@taglibprefix="c"uri="http://java.sun.com/jsp/jstl/core"%>
<%@pageimport="java.io.*"%>
<!DOCTYPEhtmlPUBLIC"-//W3C//DTDXHTML1.0Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<htmlxmlns="http://www.w3.org/1999/xhtml">
<head>
<metahttp-equiv="Content-Type"content="text/html;charset=utf-8"/>
<linkhref="styles/basic.css"rel="stylesheet"type="text/css"/>
<title>download</title>
</head>
<%
response.setCharacterEncoding("gb2312");
request.setCharacterEncoding("gb2312");
if(request.getParameter("file")!=null){
OutputStreamos=null;
FileInputStreamfis=null;
try{
Stringfile=request.getParameter("file");
if(!(newFile(file)).exists()){
System.out.println("没有文件");
return;
}
System.out.println("文件名为："+file);
os=response.getOutputStream();
response.setHeader("content-disposition","attachment;filename="+file);
response.setContentType("application/vnd.ms-excel");//此项内容随文件类型而异
bytetemp[]=newbyte[1000];
fis=newFileInputStream(file);
intn=0;
while((n=fis.read(temp))!=-1){
os.write(temp,0,n);
}
}catch(Exceptione){
out.print("出错");
}finally{
if(os!=null)
os.close();
if(fis!=null)
fis.close();
}
out.clear();
out=pageContext.pushBody();
}
%>
<formaction=""method="post">
<selectname="file">
<optionvalue="D:\ProgramFiles\apache-tomcat-6.0.18\webapps\StarAttendance\upload/temp.xls">
冷山sky_snow
</option>
</select>
<inputtype="submit"/>
</form>
</html>
2.另外一个修改后的版本（下载文件名可包含中文）
<%@pagelanguage="java"import="java.util.*,java.net.*"pageEncoding="utf-8"%>
<%@taglibprefix="c"uri="http://java.sun.com/jsp/jstl/core"%>
<%@pageimport="java.io.*"%>
<!DOCTYPEhtmlPUBLIC"-//W3C//DTDXHTML1.0Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<metahttp-equiv="Content-Type"content="text/html;charset=utf-8">
<htmlxmlns="http://www.w3.org/1999/xhtml">
<head>
<metahttp-equiv="Content-Type"content="text/html;charset=utf-8"/>
<linkhref="styles/basic.css"rel="stylesheet"type="text/css"/>
<title>download</title>
</head>
<%
response.setCharacterEncoding("UTF-8");
request.setCharacterEncoding("UTF-8");
Stringfilepath=newString(request.getParameter("file").getBytes("ISO-8859-1"),"UTF-8");
System.out.println("============================"+filepath);
if(filepath!=null){
OutputStreamos=null;
FileInputStreamfis=null;
try{
Stringfile=filepath;
if(!(newFile(file)).exists()){
System.out.println("没有文件");
return;
}
Stringfilefilename=file.substring(file.lastIndexOf("\\")+1);
System.out.println("文件名为："+filename);
os=response.getOutputStream();
response.setHeader("content-disposition","attachment;filename="+newString(filename.getBytes("GBK"),"ISO-8859-1"));
response.setContentType("application/octet-stream");//八进制流与文件类型无关
bytetemp[]=newbyte[1024];
fis=newFileInputStream(file);
intn=0;
while((n=fis.read(temp))!=-1){
os.write(temp,0,n);
}
}catch(Exceptione){
out.print("出错了");
}finally{
if(os!=null)
os.close();
if(fis!=null)
fis.close();
}
out.clear();
out=pageContext.pushBody();
}
%>
</html>
希望本文所述对大家JSP程序设计有所帮助。