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！