struts2文件下载功能实现代码如下所示：
Action文件
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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：
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<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:
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<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！
