Struts2 上传下载

后台代码：

public String getFileName() {

String fileName = this.getRequest().getParameter("fileName");

String downloadFileName = fileName;

try {

} catch (Exception e) {

e.printStackTrace();

}

return downloadFileName;

}

// 下载的流

public InputStream getInputStream() {

String rootPath = CustomizedPropertyPlaceholderConfigurer

.getContextProperty(SystemConstants.ROOT_PATH).toString();

String name = this.getFileName();

String realPath = rootPath + name;

InputStream in = null;

try {

in = new FileInputStream(new File(realPath));

return in;

} catch (Exception e) {

e.printStackTrace();

System.out

.println("Can not find a java.io.InputStream with the name [inputStream] in the invocation stack. Check the <param name="inputName"> tag specified for this action.检查action中文件下载路径是否正确.");

return null;

}

}

public String download() {

return "download";

}

struts.xml 配置文件设置

<result name="download" type="stream">
<!-- 该参数负责下载文件后的（另存为），默认保存的文件名-->

     <param name="contentDisposition">filename="${fileName}"</param>

<!--下载文件流 -->

<param name="inputName">inputStream</param>

<!--缓存 -->

<param name="bufferSize">4096</param>

</result>