Struts2实现文件下载功能代码分享(文件名中文转码)

struts2文件下载功能实现代码如下所示：

action文件

public class downloadaction extends actionsupport { 
/** 
* 
*/ 
private static final long serialversionuid = 5879762231742395104l; 
private string filename;//用户请求的文件名 
private string inputpath;//下载资源的路径(在struts配置文件中设置) 
public void setinputpath(string inputpath) { 
this.inputpath = inputpath; 
} 
public string getinputpath() { 
return inputpath; 
} 
public void setfilename(string filename) { 
this.filename = filename; 
} 
public string getfilename() { 
return filename; 
} 
public string downloadfile() throws exception { 
servletcontext context = servletactioncontext.getservletcontext(); 
string downloaddir = context.getrealpath("/upload"); 
string downloadfile = context.getrealpath(inputpath); 
//防止用户请求不安全的资源 
if(!downloadfile.startswith(downloaddir)) { 
return null; 
} 
return "download_success"; 
} 
/* 
* 获取输入流资源 
*/ 
public inputstream getinputstream() throws exception { 
string path = inputpath + file.separatorchar + new string(filename.getbytes("iso-8859-1"), "utf-8"); 
return servletactioncontext.getservletcontext().getresourceasstream(path); 
} 
/* 
* 获取下载时文件默认的文件名 
*/ 
public string getdownloadfilename() { 
string downloadfilename = filename; 
try { 
downloadfilename = urlencoder.encode(downloadfilename, "iso-8859-1"); 
} catch (unsupportedencodingexception e) { 
e.getmessage(); 
e.printstacktrace(); 
} 
return downloadfilename; 
} 
} 

jsp文件：

<li> 
<a href="<%=path%>/download_downloadaction_downloadfile.action?filename=dwr.jar">dwr.jar文件下在</a> 
</li> 
<li> 
<a href="<%=path%>/download_downloadaction_downloadfile.action?filename=struts2教程.pdf">struts2教程.pdf文件下在</a> 
</li> 

struts.xml:

<action name="download_*_*" class="com.wang.action.{1}" method="{2}"> 
<param name="inputpath">/upload</param> 
<!-- result type设置为stream --> 
<result name="download_success" type="stream"> 
<!-- mime类型 --> 
<param name="contenttype">application/octet-stream</param> 
<!-- inputname的值与action获取输入流资源的方法名相对应(action中定义getinputstream方法,并且返回类型为inputstream) --> 
<param name="inputname">inputstream</param> 
<!-- 设置带附件的文件 动态获取文件名(action中定义getdownloadfilename方法) --> 
<param name="contentdisposition">attachment;filename="${downloadfilename}"</param> 
<!-- 设置缓冲大小 --> 
<param name="buffersize">2048</param> 
</result> 
</action> 

以上所述是小编给大家介绍的struts2实现文件下载功能代码分享(文件名中文转码)的相关内容，希望对大家有所帮助！