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"; 
} 
 
public InputStream getInputStream() throws Exception { 
String path = inputPath + File.separatorChar + new String(fileName.getBytes("ISO-8859-1"), "UTF-8"); 
return ServletActionContext.getServletContext().getResourceAsStream(path); 
} 
 
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：

 
/download_DownLoadAction_downloadFile.action?fileName=dwr.jar">dwr.jar文件下在 
 
 
/download_DownLoadAction_downloadFile.action?fileName=Struts2教程.pdf">Struts2教程.pdf文件下在 
 

struts.xml:

 
/upload 
 
 
 
application/octet-stream 
 
inputStream 
 
attachment;filename="${downloadFileName}" 
 
2048 
 
 

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